Micrometer The origin of Mitutoyo s trustworthy brand of small tool instruments

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1 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Sheet Metal Micrometers SERIES 389, 118 Measures thickness of sheet metal. IP65 water/dust protection (389 series). Measuring faces: Caride Profile of measuring faces: Flat-Flat, Spherical-Flat and Spherical-Spherical. Equipped with Ratchet Stop for constant measuring force. IP Codes (389 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical Data Flatness:.6μm/.24 for models with 15mm/6 throat 1μm/.4 for models with 3mm/12 throat Parallelism: 3μm/.12 Quantizing error (389 series): excluding ±1 count Standard, Flat-Flat (F-F) Order No. Range Resolution Accuracy* Throat Measuring depth surfaces F-F ±4µm 15mm S-F - 25mm S-S mm ±5µm 3mm* F-F mm ±4µm 15mm S-F S-S Order No. Range Graduation Accuracy Throat depth Measuring surfaces Analog mm F-F ±4µm mm 15mm S-F mm S-S ±5µm 3mm* F-F mm ±4µm 15mm S-S *1 Models with a 3mm (12") throat are equipped with a stand for convenience of measurement in the horizontal orientation as standard. Analog models a c d e f / Order No. Range Resolution Accuracy* Throat Measuring depth surfaces F-F ±.2" 6" S-F - 1" S-S.5"/.1mm F-F "- 2" ±.2" 6" S-F S-S Order No. Range Graduation Accuracy Throat depth Measuring surfaces Analog F-F " ±.2" 6" S-F - 1" S-S ±.25" 12".1" "- 2" ±.2" 6" F-F Spherical-Flat (S-F) Spherical-Spherical (S-S) attery for 389 series SR44 (1pc), , 2pcs: , for initial operational checks (standard accessory) Optional accessories Connecting cales for Series 389 (excluding and ) 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 SPC cales for U-WAVE, 389 series (excluding and ) w/ data switch (16mm): 2AZD79 For foot switch: 2AZE14 Connecting ccales for , Recommended cales: L-Type (does not interfere with operating the thimle.) 1m: 4AZ512 2m: 5AZ513 Straight type (may interfere with operating the thimle.) 1m: m: (ø8) (ø21) ø21 33 C.2 oth Spindle / Anvil ø8 ( ): Order No Stand 33 Stand Refer to page A-21 for detailed information aout recommended cales. Order No. a c d e f

2 Sheet Metal Micrometer SERIES 119 Large diameter dial model enales easy and quick measurement of sheet metal thickness. Adjustale anvil. Measuring faces: Caride Equipped with Ratchet Stop for constant measuring force Order No. Range Graduation Accuracy Throat depth mm.1mm ±4µm 5mm SR2 (Anvil) ø6 ø19-38

3 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Tue Micrometers SERIES 395, 115, 295 Measuring faces: Caride (115-11: only the spindle is caride tipped.) 395 series: IP65 digital spherical-flat anvil type micrometer. Equipped with Ratchet Stop for constant measuring force. IP Codes (395 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical Data Flatness:.6μm/.24 (115 & 295 Series).3μm/.12 (395 Series) ød Order No. Range Resolution Accuracy* ød mm ø mm ±2µm.1mm mm ø mm ±3µm ø2 Order No. Range Graduation Accuracy ød Analog mm ø mm ø1 ±3µm mm ø mm.1mm ø mm ±4µm Mechanical counter model mm ±3µm ø1 / Order No. Range Resolution Accuracy* ød " 1" - 2".5"/ ±.1" ø.59" " - 3".1mm " - 4" ±.15" ø.75" Order No. Range Graduation Accuracy ød Analog ".1" ±.15" ø.4" Mechanical counter model ".1" ±.15" ø.4" SR4 attery for series 395 SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 395 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T 2AZD79 16mm For foot switch: 2AZE14 Refer to page A-21 for details ø3 SR ø

4 These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Tue Micrometers SERIES 395, 115, 295 Spherical Anvil and Spindle Type IP Codes (395 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Measuring faces: Caride (115-21: only the spindle is caride tipped.) 395 series: IP65 spherical anvil and spindle type digital micrometer. Equipped with Ratchet Stop for constant measuring force SR4 ød SR4 attery for series 395 SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 395 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T 2AZD79 16mm For foot switch: 2AZE14 Refer to page A-21 for details. Order No. Range Resolution Accuracy* ød mm ø mm ±2µm.1mm mm ø mm ±3µm ø2 Order No. Range Graduation Accuracy ød Analog mm ø mm ø1 ±3µm mm.1mm ø mm ø mm ±4µm Mechanical counter model mm.1mm ±3µm ø1 / Order No. Range Resolution Accuracy* ød " " - 2".5"/ ±.1" ø.59" " - 3".1mm ø.75" " - 4" ±.15" ø.79" Order No. Range Graduation Accuracy ød Analog ".1" ø.4" " ±.15" ø.44".1" " ø.67" Mechanical counter model ".1" ±.15" ø.4" (94) ø15 (42.5) 4 4 ø1 SR SR1 Details of the measuring unit -4

5 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Tue Micrometers SERIES 395, 115, 295 Spherical and Cylindrical Anvil Type Spindle face: Caride 395 Series: IP65 spherical and cylindrical anvil type digital micrometers Equipped with Ratchet Stop for constant measuring force. IP Codes (395 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Type A (pin) Type (spherical) Type C (cylindrical) Type D (cylindrical) Order No. Range Resolution Accuracy* Remarks Type A Type - 25mm.1mm ±3µm Type C Type D Order No. Range Graduation Accuracy Remarks Analog Type A - 25mm Type Type A 25-5mm.1mm ±3µm Type Type C - 25mm Type D / Order No. Range Resolution Accuracy* Remarks Type.5"/ ".1mm ±.15" Type C Type D Order No. Range Graduation Accuracy Remarks Analog " Type A " ±.15" Type C.1" Type D L ød D: Minimum measurale inside diameter L: Distance to spindle center ø1.8 8 Type A (pin) Sø ø ø4 ø6.9 ø6.9 Type (spherical) ø8 Type C (cylindrical) Type D (cylindrical) Anvil D L Type A 2 Type Type C Type D attery for series 395 SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 395 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T 2AZD79 16mm For foot switch: 2AZE14 Refer to page A-21 for details. -41

6 These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Spline Micrometers SERIES 331, 111, 131 IP Codes (331 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical Data Flatness:.3μm/.12 Parallelism: (2+R/1)μm, R = max. range (mm) [.8 +.4(R/4)] R = max range (inch) fraction rounded down The anvil and spindle are of small diameter for measuring splined shafts, slots, and keyways. IP65 water/dust protection (series 331). Measuring faces: Caride Equipped with Ratchet Stop for constant measuring force Type A ø3mm Type ø2mm ø3 ø2 attery for series 331 SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 331 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T 2AZD79 16mm For foot switch: 2AZE14 Refer to page A-21 for details. Order No. Range Resolution Accuracy* Remarks mm mm ±2µm mm Type A mm.1mm ±3µm mm mm mm ±2µm mm ±3µm Type Order No. Range Graduation Accuracy Remarks Analog mm Type mm mm ±3µm mm mm mm ±4µm mm mm.1mm Type A mm ±5µm mm mm mm ±6µm mm Mechanical counter model mm ±3µm Type A / Order No. Range Resolution Accuracy* Remarks " " - 2" ±.1" " - 3" Type A " - 4".5"/ ±.15" ".1mm " - 2" " - 3" ±.1" " - 4" ±.15" Type Order No. Range Graduation Accuracy Remarks Analog ".1" ±.15" Type A -42

7 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Digital Models Models up to 75mm measuring range a d c Range a c d - 25mm mm mm Digital Models Models over 75mm measuring range 16.7 a d c Analog Models Models up to 3mm measuring range a c d Range a c d - 25mm mm mm mm mm mm mm mm mm mm mm mm

8 These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV. (Refer to page IX for details.) Point Micrometers SERIES 342, 142, 112 IP Codes (342 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical Data Pointed spindle and anvil for measuring the we thickness of drills, small grooves, keyways, and other hard-to-reach features. The measuring points (caride tipped) have approximately.3mm radius. 342 series: IP65 Digimatic micrometers Equipped with Ratchet Stop for constant measuring force Tip angle: 15º Tip angle: 3º attery for 342 series SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 342 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 SPC cales for U-WAVE w/ data switch (16mm): 2AZD79 For foot switch: 2AZE14 (Refer to page A-21 for details.) Order No. Range Resolution Accuracy* Point (With caride tip) mm mm ±2µm mm mm ±3µm.1mm mm mm ±2µm mm mm ±3µm 15º 3º / Order No. Range Resolution Accuracy* Point (With caride tip) " " ±.1" " 15º ".5"/ ±.15" ".1mm " ±.1" " 3º " ±.15" Order No. Range Graduation Accuracy Point Analog mm mm ±3µm mm 15º mm ±4µm mm mm mm ±3µm mm ±4µm Analog (With caride tip) mm.1mm mm ±3µm mm mm ±4µm mm ±3µm mm mm mm ±4µm Mechanical counter model º 15º 3º 15º - 25mm ±3µm º Order No. Range Graduation Accuracy Point Analog " 15º " - 2" ±.15" " 3º " - 2" Analog (With caride tip) " - 1" " - 2".1" 15º " - 3" ±.15" " " - 2" 3º Mechanical counter model º - 1" ±.15" º -44

9 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Digital models up to 75mm measuring range (25) a c d c Digital models over 75mm measuring range a d (25) c Analog models measuring range a d c Order No. a c d Frame thickness* (11.2) (12.8) (12.8) (2.8) (9) (1) (11) (13) *1 Digimatic type: thickness over heat shield 15 type 3 type (SR.3) (SR.3) -45

10 attery for 314 series SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for 314 series 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 SPC cales for U-WAVE w/ data switch (16mm): 2AZD79 For foot switch: 2AZE14 (Refer to page A-21 for details.) V-Anvil Micrometers SERIES 314, Flutes and 5 Flutes Measures the outside diameter of cutting tools (such as taps, reamers, end mills) which have three or five flutes. Measures pitch diameter: refer to Quick Guide to Precision Measuring Instruments on page -72. Measuring faces: Caride Equipped with Ratchet Stop for constant measuring force Anvil Wire Spindle Tap Pitch Diameter Measurement of Tap y Single-wire Method

11 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments For 3-flute cutting tools Order No. Range Resolution Accuracy* Remarks Anvil mm mm ±4µm w/groove mm.1mm ±5µm 6º mm ±4µm mm *Excluding quantizing error For 3-flute cutting tools Order No. Range Graduation Accuracy Remarks Anvil Analog Anvil, Spindle (With caride tip) mm ±4µm Analog Spindle (With caride tip) mm mm ±4µm w/groove mm ±5µm.1mm 6º mm ±6µm mm mm ±7µm mm ±4µm mm For 5-flute cutting tools Order No. Range Resolution Accuracy Remarks Anvil Analog Anvil, Spindle (With caride tip) mm ±4µm Analog Spindle (With caride tip) mm ±4µm w/groove mm.1mm ±5µm 18º mm ±6µm mm ±7µm mm ±4µm / For 3-flute cutting tools Order No. Range Resolution Accuracy* Remarks Anvil " ±.2" w/groove " - 1".5"/ " - 1.6" ±.25".1mm " ±.2" " - 1" 6º *Excluding quantizing error For 3-flute cutting tools Order No. Range Graduation Accuracy Remarks Anvil Analog Spindle (With caride tip) " - 6" ±.2".1" " - 1.6" ±.25" 6º For 5-flute cutting tools Order No. Range Graduation Accuracy Remarks Anvil Analog Spindle (With caride tip) " - 1".1" ±.2" 18º 12 A 9 A View on arrow (a) For 3-flute cutting tools Range (a) 1-25mm mm mm mm mm w/o groove model w/ groove model.5(14.7) 8 ø1.5 8 ø (14.5) (23.46) A A View on arrow

12 Technical Data Parallelism 3μm/.12 for models up to 75mm/ 3 (3+R/1)μm for models over 75mm, R = max. range (mm) fraction rounded up.16 for 4 models Type and Dimensions Type A ø6 R8.75 Type ø6 R lade Micrometers SERIES 422, 122 Non-Rotating Spindle Type The anvil and spindle are lade-shaped for measuring the groove diameter of shafts, keyways, and other hard-to-reach features. Caride-tipped measuring faces are also availale. Non-rotating spindle type. Equipped with Ratchet Stop for constant measuring force Type C (caride-tipped) 6 ø Type D (caride-tipped) 6 ø Quickmike Type (LCD) attery for 422 series SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales for digital models 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T (digital models) 2AZD79 (16mm) For foot switch: 2AZE14 Connecting cales for Quickmike type 1m: m: US Input Tool Direct US-ITN-E (2m): 6ADV38E Connecting cales for U-WAVE-T (Quickmike type) 2AZD79E 16mm For foot switch: 2AZE14E Refer to page A-21 for details. Quickmike Provides a speedy spindle feed of 1mm per thimle rotation, which enales widely differently sized features to e measured quickly. Deviation etween the Anvil and Spindle in the Vertical Direction within.15mm Deviation etween the anvil and spindle in the vertical direction Deviation of.15mm or less is guaranteed etween the anvil and spindle in the vertical direction. * When the measuring range is - 25mm Order No. Range Resolution Accuracy* Remark mm mm ±3µm mm Type A mm ±4µm.1mm mm Type mm ±3µm Type C - 25mm Type D Quickmike type Order No. Range Resolution Accuracy* Remark mm mm.1mm ±3µm Type A Order No. Range Graduation Accuracy Remark Analog mm mm ±3µm mm mm mm ±4µm mm mm.1mm Type A mm ±5µm mm mm mm mm mm mm Analog (With caride tip) mm ±6µm.1mm ±3µm Type.1mm Type C mm ±3µm mm.1mm Type D mm Notes: 1) A heat shield is provided with Digimatic models and as standard. / Order No. Range Resolution Accuracy* Remark " " - 2" ±.15" Type A " - 3".5"/ " - 4" ±.2".1mm Type " ±.15" Type C Type D / Quickmike type Order No. Range Resolution Accuracy* Remark ".5"/.1mm ±.15" Type A Order No. Range Graduation Accuracy Remark Analog " " - 2" ±.15" Type A " - 3".1" " - 4" ±.2" Type - 1" ±.15" Type D -48

13 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Digital models up to 5mm measuring range a d 42.5 c ø6 ø14 Range a C d - 25mm mm Digital models over 75mm measuring range a d c ø6 Range a C d 5-75mm mm Quickmike type a c d ø6 ø24.9 Range a C d - 3mm mm Analog models measuring range a d c a c d ø6 ø8 ø6 ø8 ø12 Range a C d 25-5mm mm mm mm mm mm mm mm mm mm mm Range a C d - 25mm

14 ø6 ø6 ø6 Technical Data Can Seam Micrometers SERIES 147 Measures the width, height, and depth of can seams for steel cans (for depth measurements up to 5mm) Order No. Range Graduation Accuracy Remarks for steel cans mm.1mm ±3µm for aluminum cans for spray cans Order No. Range Graduation Accuracy Remarks for steel cans ".1 ±.15" for aluminum cans for spray cans for aluminum cans Zero point adjustment , ø ø5 for spray cans SR.3 x ø ø13.7 ø13 ø13.7 ø13 Zero point adjustment , ø13.7 ø13 Zero point adjustment ,

15 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Hu Micrometers SERIES 147 Measures hu thickness and shoulders inside a ore. Measuring faces: Caride Equipped with Ratchet Stop for constant measuring force. Technical data Flatness:.6μm/.24 Parallelism: (2+R/1)μm, R = max. range (mm) [ (R/4)] R = max. range (mm) *fraction rounded up Order No. Range Graduation Accuracy mm mm ±2µm.1mm mm mm ±3µm Order No. Range Graduation Accuracy " " - 2" ±.1" " - 3" " - 4" ±.15" 2.8 L h3 Wire Micrometers Series 147 Technical Data Flatness:.6μm/.24 Parallelism: 1.3μm/.5 Designed for measuring wire thickness. Measurale wire dia.: 1mm or less Measuring faces: Caride Equipped with Ratchet Stop for constant measuring force. Order No. Range Graduation Accuracy mm.1mm ±3µm Order No. Range Graduation Accuracy ".1 ±.15" ø15 2 ø16 7 H h1 Range h1 h2 h3 H L h2-25mm mm mm mm 75-51

16 These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Crimp Height Micrometers Series 342,112,142 IP Codes ( , 371 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Measures the height of crimp contacts. Equipped with Ratchet Stop for constant measuring force. IP65 water/dust protection (digital model). Model is the Quickmike type, which provides a speedy spindle feed of 1mm per thimle rotation, which enales widely differently sized features to e measured quickly Quickmike type (LCD) ø , , ø , ø.6 27 attery for 342 series SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales (digital model) 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T (digital model) 2AZD79 (16mm) For foot switch: 2AZE14 Connecting cales (Quickmike type) 1m: m: US Input Tool Direct US-ITN-E (2m): 6ADV38E Connecting cales for U-WAVE-T (Quickmike type) 2AZD79E 16mm For foot switch: 2AZE14E Refer to page A-21 for details. Order No. Range Resolution Accuracy* mm.1mm ±3µm Quickmike (LCD) mm.1mm ±3µm Order No. Range Graduation Accuracy Mechanical counter model mm - 25mm mm ±3µm Order No. Range Graduation Accuracy Analog mm.1mm ±3µm No A / Order No. Range Resolution Accuracy* ".5"/.1mm ±.15" C.5.5 ø.5 A View on arrow 6-52

17 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments These marks indicate that a product has successfully passed IP65-level testing, which is carried out y the independent German certification organization TÜV Rheinland. (Refer to page IX for details.) Uni-Mike Series 317, 117 Interchangeale Anvil Type Measures tuing thickness, shoulderedge distance, rivet head height, etc., with interchangeale anvils (flat anvil, rod anvil, V-anvil). IP65 water/dust protection (317 series). Equipped with Ratchet Stop for constant measuring force. IP Codes (317 series) Level 6: Dust-proof. No ingress of dust allowed. Level 5: Protected against water jets. Water projected in jets against the enclosure from any direction shall have no harmful effects. Technical data Flatness: Spindle face.6μm Anvil face 2μm Parallelism: 3μm Order No. Range Resolution Accuracy* mm mm.1mm ±4µm Order No. Range Graduation Accuracy Analog mm mm.1mm ±4µm (27.5) 25 () / Order No. Range Resolution Accuracy* " " - 2".5"/.1mm ±.2" Order No. Range Graduation Accuracy Analog " " - 2".1" ±.2" ( ): for -25mm measuring range model attery for 317 series SR44 (1 pc), , for initial operational checks (standard accessory) Optional accessories Connecting cales (317 series) 1m: 5CZA662 2m: 5CZA663 US Input Tool Direct US-ITN- (2m): 6ADV38 Connecting cales for U-WAVE-T 2AZD79 16mm For foot switch: 2AZE14 Refer to page A-21 for details. Accessories ø3 (for 25mm) ø5 (for 5mm) Rod anvil (Standard accessory) 12 V-anvil (optional) R Flat anvil (Standard accessory) Order No. Item Flat anvil (standard accessory) Rod anvil (standard accessory for ) Rod anvil (standard accessory for ) V-anvil (optional) ase for 25mm (optional) -53

18 Limit Micrometers SERIES 113 Dual-spindle design enales use as a GO/±NG gage y setting upper and lower limits. Measuring faces: Caride Order No. Range Graduation Accuracy Flatness Parallelism mm mm.1mm ±3µm.6µm 3µm a d C.5 (each spindle & anvil) Range a d - 25mm mm

19 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Indicating Micrometers SERIES 51 (Refer to page IX for details.) Suited to the measurement of low-volume manufactured parts. Easy to use when operating one-handed due to retractale anvil. In the 25mm measuring range, the model lineup offers a choice of left or right positioning of the anvil-retraction utton. Greatly improved accuracy: indication error and graduation of 1μm. Water-proof to protection level IP54. Hard-coated crystal: enhanced oil and scratch resistance. Indicator scale is large and easy-to-read. The zero position and adjustale limit markers, for GO/±NG testing, are easily set. Measuring faces: Caride Technical Data Flatness:.3μm/.12 Parallelism:.6μm/.24 for models up to 5mm/ 2 1μm/.4 for models over 5mm/ 2 Accuracy: ±2μm Spindle feed error: 3μm/.15 Dispersion of indication:.4μm/.2 Dial indication accuracy: 1μm/.5 Workpiece stop (optional) Realizes more stale measurement. Three types are availale to suit workpieces of different sizes. Range A Workpiece stop A 4AZA124 ø16 23 Workpiece stop 4AZA125 ø Workpiece stop C 4AZA126 ø14 15 A Dmin Dmax C Workpiece stop (optional) Order No. Range Indicating range Graduation d Dial graduation Measuring force Anvil retraction utton 5 Mass Right side 52g - 25mm g mm ±.6mm.1mm 2.1mm 3 5-1N Left side 67g mm 82g mm Retractale anvil 97g utton 6 6 Heat shield Order No. Range Indicating range Graduation Dial graduation Measuring Thickness: force Anvil t retraction utton Mass Workpiece stop (optional) Right side 52g - 1" d g " - 2" 5 ±.23".1".5" 5-1N Left side 67g " - 3" 45 82g " - 4" g Up to 25mm measuring range (anvil-retraction utton on the right side) Workpiece stop (optional) Retractale anvil utton Heat shield Over 5mm measuring range (anvil-retraction Thickness: t utton on the left side) d 19Workpiece 3 5stop (optional) d d Range mm Retractale anvil utton mm Retractale anvil utton 5 5 Heat shield 6.1 mm 6 Thickness: Heat tshield Up to 25mm measuring range (anvil-retraction Workpiece Thickness: stop tutton (optional) on the left side) d 19Workpiece 3 5stop (optional) d Retractale anvil utton mm mm Retractale anvil utton Heat shield Thickness: t Retractale anvil utton Heat shield Thickness: t d Range d Range ø8 ø8 ø8 ø8 ø8 Workpiece stop ø ø ø21 ø mm.1 mm ø8 ø8 ø8 Workpiece stop (optional) Heat shield Thickness: t ø21 ø21 Range d t - 25mm mm mm mm ø21 Dmin: Minimum measurale diameter Dmax: Maximum measurale diameter C: Distance from the center of the workpiece to the upper surface of the workpiece stop 6 4 Order No , , , Dmin Dmax C Workpiece stop A N/A N/A N/A Workpiece stop Workpiece stop C and Dmin Dmax C Workpiece stop A Workpiece stop Workpiece stop C and Dmin Dmax C Workpiece stop A Workpiece stop Workpiece stop C and Dmin Dmax C Workpiece stop A Workpiece stop Workpiece stop C

20 (Refer to page IX for details.) Dial Snap Meters SERIES 523 Technical Data Indicator Indicating range: ±.6mm/±.23 Repeataility of indication:.4μm/.2 Dial indication accuracy: 1μm/.5 Flatness:.3μm/.12 Parallelism:.6μm/.24 for models up to 5mm/2 measuring range 1μm/.4 for models over 5mm/2 measuring range Suited to the measurement of massproduced parts. Designed for measurement using a stand: realizes stale measurement. Greatly improved accuracy: indication error and graduation of 1μm. Water-proof to protection level IP54. Hard-coated crystal: enhanced oil and scratch resistance. Indicator scale is large and easy-to-read. Easily settale adjustale limit markers for GO/±NG testing. Equipped with an elevating workpiece stop as standard. Measuring faces: Caride Order No. Range Dial graduation Measuring force Mass mm 74g mm 84g.1mm 5-1N mm 95g mm 18g Order No. Range Dial graduation Measuring force Mass " 74g " - 2" 84g.5" 5-1N " - 3" 95g " - 4" 18g 89.5 d Range ø Anvil retraction utton Work-stopper Range d - 25mm mm mm mm

21 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Snap Meters SERIES 523 Suited to the measurement of massproduced parts. Various types of indicator can e selected according to the measurement application. Measuring faces: Caride Accuracy Flatness:.3μm/.12 Parallelism:.6μm/.24 for models up to 5mm/2 1μm/.4 for models over 5mm/2 Repeataility of indication:.4μm/.2 Typical Indicators used with gage ID-C (.1mm)/ LGF-L (.1mm)/ & Counter (Indicator: optional) Order No. Range Anvil movement Measuring force* Mass mm 71g mm 81g 2mm 5-1N mm 92g mm 15g Order No. Range Anvil movement Measuring force* Mass " 71g " - 2" 81g.78" 5-1N " - 3" 92g " - 4" 15g * Measured at the position where the anvil is retracted y 1mm from the free position without installing the indicator. AS Digimatic Indicator Linear Gage and counter ø16 d 11.5 Range 88.8 Dial indicator holding diameter 89.5 ø1.8 ø Work-stopper option Range d - 25mm mm mm mm

22 Technical data Parallelism: 1μm/.4 Groove Micrometers SERIES 146 Flanged spindle and anvil for measuring width and location of grooves inside ores and tues. Two-directional ratchet stop. For ID and OD (except for - 25mm) measurement, a master gage is required for adjusting the reference point Flanges (measuring faces) Order No. Range Outside Range Inside Graduation Accuracy Flange Rotating spindle mm - 25mm mm mm mm.1mm ±1µm mm mm ø12.7mm mm mm Order No. Range Outside Range Inside Graduation Accuracy Flange Non-rotating spindle mm - 25mm mm mm mm.1mm ±1µm mm mm ø12.7mm mm mm Order No. Range Outside Range Inside Graduation Accuracy Flange Rotating spindle ø.25" - 1".55" - 1.5" " - 2" 1.5" - 2.5".1" ±.4" " - 3" 2.5" - 3.5" ø.5" " - 4" 3.5" - 4.5" Order No. Range Outside Range Inside Graduation Accuracy Flange Non-rotating spindle ø.25" - 1".55" - 1.5" " - 2" 1.5" - 2.5".1" ±.4" " - 3" 2.5" - 3.5" ø.5" " - 4" 3.5" - 4.5".75 ø ø5 ø1 ø15 (35) ø3.5 ø5 ø1 ø (34.5) ø12.7 ø12.7 ø1.75 L.75 ( ) (228.8) ø , , , L ( ) 25 (13.3) 5 (78.3) 75 (53.3) 1 (28.3) ø12.7 ø12.7 ø1 L ( ) 25 (115) 5 (9) 75 (65) 1 (4) 18 ø15.75 L.75 ( ) , , ,

23 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Quick-Mini SERIES 7 Lightweight and palm-sized. Highly suitale for quick dimensional inspection of small, thin and delicate ojects. Functions: origin setting and zero-setting. Application examples Measurement of small ojects: pearls, jewels, shims for engine tappets and screws. Measurement of thin ojects: printing paper, polyethylene ags, sheet materials, foods including noodles, lenses for glasses, media sustrates, foils, thin plates and medical products including filter cloths. Measurement of fine lines and ars: fishing lines, dental reamers, pasta, drills for PC and hard wiring. Technical Data SR44 (1 pc), , for initial operational checks (standard accessory) Order No. Range Resolution Accuracy* Mass mm.1mm ±.2 7 g / Order No. Range Resolution Accuracy* Mass "- 5"/ - 12mm.5"/.1mm ±.1" 7 g ø

24 Small Hole Gage Set SERIES 154 Extra long for gaging deep and shallow holes, slots, and similar workpiece features. Two sprung leaves are fully expanded inside a feature so that its size can e measured with an outside micrometer after extraction. 67 L Clamp ød1 ød Range ød1 L ød 3-5mm mm mm mm Order No. Range 4-gage Set mm Gages included mm mm mm mm Order No. Range 4-gage Set " -.5" Gages included " -.2" " " " Telescoping Gage Set SERIES 155 A spring-loaded plunger expands within a ore (or groove) and is locked in place, allowing measurement of diameter (or width) with an outside micrometer after extraction. Order No. Range 6-gage Set mm Gages included mm mm mm mm mm mm ød1 ød2 L Clamp ød Order No. Range 6-gage Set " - 6" Gages included " -.5" " " " " " Range L ød ød1 ød mm mm mm mm 54-9mm 9-15mm

25 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Setting Standards for Outside Micrometers SERIES 167 Used for adjusting the reference point of the outside micrometer. Technical Data Flatness:.3μm Parallelism: 2μm and D L 12.7 Order No. Length (L) Tolerance Diameter (D) mm ±1.5µm mm mm ±2.µm mm mm ±2.5µm mm Order No. Length (L) Tolerance Diameter (D) " ±.5" 18.25" " ±.1" 4.25" " ±.1" 4.25" L Order No. Length (L) Tolerance Diameter (D) mm ±3µm 7.9mm mm ±3.5µm 7.9mm mm ±4µm 7.9mm mm ±4.5µm 7.9mm Order No. Length (L) Tolerance Diameter (D) " ±.1".31" " ±.15".31" " ±.15".31" " ±.15".31" L Order No. Length (L) Tolerance Diameter (D) mm ±5.µm mm mm ±5.5µm mm mm ±6.µm mm mm ±6.5µm mm mm ±7µm mm mm ±7.5µm mm mm ±8µm mm mm ±8.5µm 8 9.4mm mm ±9µm mm mm ±9.5µm 9 9.4mm mm ±1µm mm mm ±1.5µm mm Order No. Length (L) Tolerance Diameter (D) " ±.15" 47.37" " ±.2" 47.37" " ±.2" 52.37" " ±.2" 57.37" " ±.25 " 64.37" " ±.25" 69.37" " ±.25" 74.37" " ±.25" 8.37" " ±.25" 85.37" " ±.25" 9.37" " ±.25" 95.37" " ±.3" 11.37" -61

26 L Order No. Length (L) Tolerance Diameter (D) mm ±11µm mm mm ±11.5µm mm mm ±12.µm mm mm ±12.5µm mm mm ±13µm mm mm ±13.5µm mm mm ±14µm mm mm ±14.5µm mm mm ±15µm mm mm ±15.5µm mm mm ±16µm mm mm ±16.5µm mm mm ±17µm mm mm ±17.5µm mm mm ±18µm mm mm ±18.5µm mm mm ±19µm mm mm ±19.5µm mm mm ±2µm mm mm ±2.5µm mm mm ±21µm mm mm ±21.5µm mm mm ±22µm mm mm ±22.5µm mm mm ±23µm mm mm ±23.5µm mm mm ±24µm mm mm ±24.5µm mm mm ±25µm mm mm ±25.5µm mm mm ±26µm mm mm ±26.5µm mm mm ±27µm mm mm ±27.5µm mm mm ±28µm mm mm ±28.5µm mm mm ±29µm mm mm ±29.5µm mm mm ±3µm mm mm ±3.5µm mm mm ±31µm mm mm ±31.5µm mm mm ±32µm mm mm ±32.5µm mm mm ±33µm mm mm ±33.5µm mm mm ±34µm mm mm ±34.5µm mm mm ±35µm mm mm ±35.5µm mm mm ±36µm mm mm ±36.5µm mm mm ±37µm mm mm ±37.5µm mm mm ±38µm mm mm ±38.5µm mm mm ±39µm mm mm ±39.5µm mm mm ±4µm mm mm ±4.5µm mm mm ±41µm mm Order No. Length (L) Tolerance Diameter (D) " ±.3" 16.47" " ±.3" " " ±.3" " " ±.3" " " ±.3" " " ±.35" " " ±.35" " " ±.35" " " ±.35" " " ±.35" " " ±.35" " " ±.35" " " ±.35" 17.47" " ±.35" " " ±.35" 18.47" " ±.35" " " ±.35" " " ±.4" " " ±.4" 21.47" " ±.4" 27.47" " ±.4" " Availale up to 79" -62

27 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Setting Standards for Screw Thread Micrometers SERIES 167 Used for accurately setting screw thread micrometers at the start or end of the measuring range (6 screw) Order No. Length Accuracy (unified) θ = mm ±4µm mm ±5µm mm ±6µm mm ±7µm mm ±8µm mm ±9µm mm ±1µm mm ±11µm mm ±12µm mm ±13µm mm ±14µm Whitworth θ = mm ±4µm mm ±5µm mm ±6µm mm ±7µm mm ±8µm mm ±9µm mm ±1µm mm ±11µm mm ±12µm mm ±13µm mm ±14µm (6 screw) Order No. Length (L) Accuracy (unified) θ = " ±.15" " ±.2" " ±.25" " ±.3" " ±.35" " ±.4" Whitworth θ = " ±.15" " ±.2" " ±.25" " ±.3" " ±.35" " ±.4" Setting Standards for V-Anvil Micrometers SERIES 167 Specially designed for accurately setting of V-anvil micrometers. ø25 Order No. Length Accuracy Type mm mm ±2µm Plug mm mm mm mm ±3µm Ring mm Order No. Length (L) Accuracy Type " " ±.1" Plug " " " " ±.15" Ring " -63

28 Optical Parallels SERIES 157 Designed to inspect parallelism and flatness of measuring faces of micrometers. For details, refer to Quick Guide to Precision Measuring Instruments. Each set consists of 4 sizes to aid in testing parallelism at various angular positions of the micrometer spindle Order No. Range of micrometer to e checked Sizes of parallels included in set Diameter Flatness Parallelism Remarks mm 12., 12.12, 12.25, 12.37mm For 25mm ø3.1µm.2µm mm 25., 25.12, 25.25, 13.37mm For 5mm Order No. Range of micrometer to e checked Sizes of parallels included in set Diameter Flatness Parallelism Remarks ".5",.562",.5125",.5187" For 25mm ø3.1µm.2µm " 1.", 1.62", 1.125", 1.187" For 5mm Optical Flats SERIES 158 Used for inspecting the flatness of very flat surfaces. For details, refer to Quick Guide to Precision Measuring Instruments Order No. Thickness Diameter Flatness grade ø45.2µm 12mm ø45.1µm ø6.2µm 15mm ø6.1µm Order No. Thickness Diameter Flatness grade " 1.8" " 2.4".4" -64

29 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Spindle Attachment Tips Simple interchangeale tips attached to standard micrometer spindles enale measurement of contours otherwise unmeasurale (for Φ6.35 spindles only). Measuring range changes when a spindle attachment tip is mounted: the maximum measuring range is 1mm or less (accuracy is not guaranteed). Technical Data Tip length: 1mm ±5μm Specifications and Dimensions Order No. Tip type Dimensions 2862 Spline ø Comparator 3 1 ø lade Knife-edge Disk-plate.7 ø12.7 Micrometer Oil Special luricant for micrometers. 27 (Content: 3ml) Order No. Product name Remarks 27 Micrometer oil Grease (3ml) -65

30 Color-Coded Ratchet and Speeder Covers Ratchet and speeder covers in a choice of seven colors for use in instrument identification control schemes: red, lue, yellow, green, rown, lack and gray. Ratchet and speeder covers Standard outside micrometers Ratchet Speeder Analog type: - 3mm Order No. Ratchet Speeder Color Material 4GZA239 4GAA26 Gray lack Red lue Plastic Yellow Green rown 957 Gray Steel Analog type: 3-1mm Order No. Ratchet Speeder Color Material 4GZA243 4GAA26 Gray 3178 lack 3179 Red lue Yellow Green 3171 rown Plastic 9571 Gray Steel Digimatic type - 3mm* Order No.* Ratchet Speeder Color 4GZA241 4GAA26 Gray 3178 lack 3179 Red lue Yellow Green 3171 rown Material Plastic Gray Steel *Cannot e used for analog types. Color-coded speeder covers Ratchet thimle micrometers QuantuMike Color-coded speeder covers Order No. 4GAA899 4GAA9 4GAA91 4GAA92 4GAA93 4AA28 Color lack Red Yellow Green lue Gray -66

31 Micrometer The origin of Mitutoyo s trustworthy rand of small tool instruments Micrometer Stands SERIES 156 Designed to allow enchtop use of hand micrometers or other gages which have frames suitale for gripping y the clamp Order No. Micrometer ranges Remarks Up to 1mm (4")* Adjustale angle type mm (-1"), 25-5mm (1"-2") Fixed angle type mm (5"-12") Vertical type mm (12"-4") Vertical type * Items that cannot e mounted on these stands ø Opening range: Opening range: ø

32 Quick Guide to Precision Measuring Instruments Micrometers Nomenclature Standard Analogue Outside Micrometer Frame Anvil Measuring faces Spindle Sleeve Adjusting nut Thimle Thimle scale Ratchet in fast drive Sleeve scale Heat Thermally insulating plate Spindle clamp Fiducial line Digimatic Outside Micrometer Measuring faces Spindle Fiducial line Thimle Sleeve Anvil Ratchet in fast drive Frame Spindle clamp Thimle scale Sleeve scale Output connector (not present in plain digital model) Display reading HOLD utton ZERO (Incremental mode) / AS (Asolute mode) setting utton Heat Thermally insulating plate Origin utton -68

33 Special Purpose Micrometer Applications lade micrometer Inside micrometer, caliper type Spline micrometer For diameter inside narrow groove measurement For small internal diameter, and groove width measurement For splined shaft diameter measurement Tue micrometer Point micrometer Screw thread micrometer For pipe thickness measurement For root diameter measurement For effective thread diameter measurement Disc type outside micrometer all tooth thickness micrometer V-anvil micrometer For root tangent measurement on spur gears and helical gears. Measurement of gear over-pin diameter For measurement of 3- or 5-flute cutting tools -69

34 How to Read the Scale Micrometer with standard scale (graduation:.1mm) (1) (1) Sleeve scale reading 7.mm 45 (2) Thimle scale reading +.37mm 5 4 (2) Micrometer reading 7.37mm 35 Note).37 mm (2) is read at the position where the sleeve 3 fiducial line is aligned to the thimle graduations. The thimle scale can e read directly to.1mm, as shown aove, ut may also e estimated to.1mm when the lines are nearly coincident ecause the line thickness is 1/5 of the spacing etween them. Index line Approx. +1µm Thimle scale Index line Approx. +2µm Thimle scale Micrometer with vernier scale (graduation:.1mm) The vernier scale provided aove the sleeve index line enales direct readings to e made to within.1mm. (3) (1) (2) 15 1 (1) Sleeve scale reading 6.mm (2) Thimle scale reading.21mm (3) Reading from the vernier scale marking and thimle graduation line +.3mm Micrometer reading 6.213mm Measuring Force Limiting Device Ratchet stop Friction thimle (F type) Ratchet thimle (T type) Ratchet thimle Measuring Face Detail ø6.3 Audile in operation Onehanded operation Yes Unsuitale No Yes Yes Suitale Suitale Suitale 3 Remarks Audile clicking operation causes micro-shocks Smooth operation without shock or sound Audile operation provides confirmation of constant measuring force Audile operation provides confirmation of constant measuring force spindle Note).21 mm (2) is read at the position where the index line is etween two graduations (21 and 22 in this case)..3 mm (3) is read at the position where one of the vernier graduations aligns with one of the thimle graduations. Caride tip 3 Micrometer with mechanical-digit display (digital step:.1mm) Third decimal place on vernier scale (.1 mm units) ø7.95 spindle ø Caride tip These drawings aove are for illustration only and are not to scale (1) mm Vernier reading.4mm (2) Fiducial line Third decimal place Second decimal place First decimal place Millimetres + Tens of mm Counter reading.4mm (2).9 mm.9 mm (1) 2. mm. mm *Indicates four digits mm Note).4 mm (2) is read at the position where a vernier graduation line corresponds with one of the thimle graduation lines. -7

35 Micrometer Expansion due to Holding Frame with the are Hand Expansion (µm) The aove graph shows micrometer frame expansion due to heat transfer from hand to frame when the frame is held in the are hand which, as can e seen, may result in a significant measurement error due to temperatureinduced expansion. If the micrometer must e held y hand during measurement then try to minimize contact time. A heat insulator will reduce this effect consideraly if fitted, or gloves may e worn. (Note that the aove graph shows typical effects, and is not guaranteed). Length Standard Expansion with Change of Temperature (for 2mm ar initially at 2 C) Thermal expansion (µm) 1 27 C 5 21 C Lapse of time (minutes) The aove experimental graph shows how a particular micrometer standard expanded with time as people whose hand temperatures were different (as shown) held the end of it at a room temperature of 2 C. This graph shows that it is important not to set a micrometer while directly holding the micrometer standard ut to make adjustments only while wearing gloves or lightly supporting the length standard y its heat insulators. When performing a measurement, note also that it takes time until the expanded micrometer standard returns to the original length. (Note that the graph values are not guaranteed values ut experimental values.) Difference in Thermal Expansion etween Micrometer and Length Standard Difference in expansion (µm) Time (minutes) 2 C 1 C Nominal length (mm) In the aove experiment, after the micrometer and its standard were left at a room temperature of 2ºC for aout 24 hours for temperature stailization, the start point was adjusted using the micrometer standard. Then, the micrometer with its standard were left at the temperatures of ºC and 1ºC for aout the same period of time, and the start point was tested for shift. The aove graph shows the results for each of the sizes from 125 through 525 mm at each temperature. This graph shows that oth the micrometer and its standard must e left at the same location for at least several hours efore adjusting the start point. (Note that the graph values are not guaranteed values ut experimental values.) 31 C -71 C Effect of Changing Support Method and Orientation (Unit: µm) Changing the support method and/or orientation of a micrometer after zero setting affects susequent measuring results. The tales elow highlight the measurement errors to e expected in three other cases after micrometers are zeroset in the Supported at the ottom and center case. These actual results show that it is est to set and measure using the same orientation and support method. Ae s Principle Ae s principle states that maximum accuracy L is otained when the scale and the measurement axes are common. This is ecause any variation in the relative angle ( ) of the moving measuring jaw on an instrument, such as a caliper jaw micrometer, causes displacement that is not measured on the instrument s scale and this is an Ae error ( = L in the diagram). Spindle straightness error, play in the spindle guide or variation of measuring force can all cause ( ) to vary and the error increases with R. Hooke's Law Hooke s law states that strain in an elastic material is proportional to the stress causing that strain, providing the strain remains within the elastic limit for that material. Hertz's Formulae Hertz s formulae give the apparent reduction in diameter of spheres and cylinders due to elastic compression when measured etween plane surfaces. These formulae are useful for determining the deformation of a workpiece caused y the measuring force in point and line contact situations. R Supporting method Supported at the ottom and center Supported only at the center Maximum measuring length (mm) P SøD (a) Sphere etween two planes Attitude Supporting method Maximum measuring length (mm) Attitude 2 2 Supported at the center in a lateral orientation. L P ød () Cylinder etween two planes 2 2 Supported y hand downward Assuming that the material is steel and units are as follows: Modulus of elasticity: E =25 GPa Amount of deformation: (µm) Diameter of sphere or cylinder: D (mm) Length of cylinder: L (mm) Measuring force: P (N) a) Apparent reduction in diameter of sphere 1=.82 P 3 2 /D ) Apparent reduction in diameter of cylinder 2 =.94 P/L 1/D 3

36 Major measurement errors of the screw micrometer Error cause Micrometer feed error Anvil angle error Misaligned contact points Influence of measuring force Angle error of thread gage Length error of thread gage Workpiece thread angle error Cumulative error Error that might Error cause Precautions for eliminating errors Possile error not e eliminated even with precautions 1. Correct the pitch error ( p = E) Pitch error 2. Measure several points and adopt their ±18µm assuming (workpiece) average. that the pitch error ±3μm 3. Reduce single pitch errors. is.2 mm. Error of half angle 1. Use the optimal wire diameter. (workpiece) 2. No correction is needed. ±.3μm ±.3μm 1. Use the optimal wire diameter. Due to anvil 2. Use the wire which has a diameter difference close to the average at the one wire ±8μm ±1μm side. 1. Use the predetermined measuring force appropriate for the pitch. Wire diameter error 2. Use the predetermined width of 3μm 1μm measurement edge. 3. Use a stale measuring force. Cumulative error Maximum possile error Screw pitch diameter measurement Three-wire method The screw pitch diameter can e measured with the three-wire method as shown in the figure. Calculate the pitch diameter (E) with equations (1) and (2). thread or unified screw (6 ) E=M 3d P...(1) Whitworth thread (55 ) E=M d P...(2) Precautions for eliminating errors 3μm 1. Correct the micrometer efore use. ±1μm ±5μm assuming the error of a half angle is 15 minutes +1μm 1. Measure the angle error and correct the micrometer. 2. Adjust the micrometer using the same thread gage as the workpiece. Screw d = Wire diameter E = Screw pitch diameter M = Micrometer reading including three wires P = Screw pitch (Convert inches to millimeters for unified screws.) Thread type Optimal wire size at D thread or unified screw (6 ).577P Whitworth thread (55 ).564P P In the worst case +2μm 35μm Error that might not e eliminated even with precautions ±3μm expected measurement error of half angle +3μm ±1μm 1. Use a micrometer with a low measuring force if possile. 2. Always use the ratchet stop. 3. Adjust the micrometer using a thread gage with the same pitch. +3μm 1. Perform correction calculation (angle). ±1μm 2. Correct the length error. 3. Adjust the micrometer using the same +3μm thread gage as the workpiece. ± ( 3+ 25) L 1. Perform correction calculation. 2. Adjust the micrometer using the same ±1μm JIS 2 grade error of half angle ±229 minutes -91μm +71μm (±117+4)μm thread gage as the workpiece. 1. Minimize the angle error as much as possile. 2. Measure the angle error and perform correction calculation. 3. Use the three-wire method for a large angle error. ±8μm assuming the error of half angle is ±23 minutes +26μm -12μm Spindle Anvil d ( 3) Major measurement errors of the three-wire method E When measured carefully +3μm 5μm M One-wire method The pitch diameter of odd-fluted tap can e measured using the V-anvil micrometer with the one-wire method. Otain the measured value (M1) and calculate M with equation (3) or (4). M1 = Micrometer reading during one-wire measurement D = Odd-fluted tap diameter Tap with three flutes : M = 3M1 2D (3) Tap with five flutes : M = 2.236M D (4) Then, assign the calculated M to equation (1) or (2) to calculate the pitch diameter (E). Root tangent length Formula for calculating a root tangent length (Sm): Sm = m cos { (Zm.5) + Z inv } + 2Xm sin Formula for calculating the numer of teeth within the root tangent length (Zm): Zm' = Z K (f) +.5 ( Zm is the integer closest to Zm'.) where, K (f) = 1 { sec (1 + 2f) 2 cos 2 inv 2f tan } and, f = X Z inv inv Gear measurement Over-pin method dp Sm dm (a) For a gear with an even numer of teeth: dg dm = dp + cosø = dp + z m cos cosø For a gear with an odd numer of teeth: dg dm = dp + cos ø cos 9 = dp + z m cos ( cosø cos z ) 9 ( z ) however, dp invø = X dp = dg 2 z m cos 2z inv + 2tan z X ( ) Otain ø (invø) from the involute function tale. Anvil Odd-fluted tap m: Module : Pressure angle Z: Numer of teeth X : Addendum modification coefficient Sm: Root tangent length Zm: Numer of teeth within the root tangent length dp () dm 9º Z Spindle Wire z : Numer of teeth : Pressure angle teeth m : Module X : Addendum modification coefficient -72

37 Testing Parallelism of Micrometer Measuring Faces Optical parallel reading direction on the spindle side Optical parallel Fringes on the spindle side Parallelism can e estimated using an optical parallel held etween the faces. Firstly, wring the parallel to the anvil measuring face. Then close the spindle on the parallel using normal measuring force and count the numer of red interference fringes seen on the measuring face of the spindle in white light. Each fringe represents a half wavelength difference in height (.32μm for red fringes). In the aove figure a parallelism of approximately 1µm is otained from.32µm x 3=.96µm. Testing Flatness of Micrometer Measuring Faces Flatness can e estimated using an optical flat (or parallel) held against a face. Count the numer of red interference fringes seen on the measuring face in white light. Each fringe represents a half wavelength difference in height (.32μm for red). General notes on using the micrometer 1. Carefully check the type, measuring range, accuracy, and other specifications to select the appropriate model for your application. 2. Leave the micrometer and workpiece at room temperature long enough for their temperatures to equalize efore making a measurement. 3. Look directly at the fiducial line when taking a reading against the thimle graduations. If the graduation lines are viewed from an angle, the correct alignment position of the lines cannot e read due to parallax error. (a) () (c) Sleeve Thimle (a) From aove the index line () Looking directly at the index line Interference fringe reading direction (c) From elow the index line 4. Wipe off the measuring faces of oth the anvil and spindle with lint-freepaper set the start (zero) point efore measuring. Optical flat Anvil Measuring face is curved y approximately 1.3μm. (.32μm x 4 paired red fringes.) Optical flat Anvil Measuring face is concave (or convex) approximately.6μm deep. (.32μm x 2 continuous fringes) -73