
 Britton Bailey
 3 months ago
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6 Selection of jack size No. 5 Check again with ball screw jack Type JB. Yes. Set the hand wheel radius if the screw jack is to be used for manual operation. Yes. Yes. Specification Select temporarily the size No. of the screw jack having the standard capacity to meet the load. Assume the worm reduction ratio as"h"and obtain the required input shaft rpm from the lifting speed. Is the allowable maximum input shaft rpm exceeded? No. Calculate the required input shaft torque from the load at the time of lifting. Obtain the required power per jack from the required input shaft torque and rpm. Is the maximum power per jack exceeded? No. Is the allowable buckling load exceeded? No. If low speed or fine adjustment is specially required, check assuming the worm reduction ration as "L" If the jack is so designed that tensile loads are applied to the screw, the size No. can be selected economically without concern about bucking even when a long stroke is needed. Adopt the size No. Required jack performance <Step 1> Formula (1) Select temporarily J2G and obtain the input shaft min 1 n assuming the worm reduction ratio as H. V : lifting speed (mm/min) n : input shaft min 1 C : speed coefficient (see page 7) n Since the allowable input min 1 for J2G is 10 min 1, this n is acceptable. <Step 2> Next. obtain the required input shaft torque. Formula (2) Formula (3) [Calculation example] Load at the time of lifting: 30 kn Lifting speed: 0 mm/min. n T : required input shaft torquenm a : torque coefficient (see page 7) b : input shaft no load torque (see page 7) W : lifting load (kn) <Step 3> Obtain the required power from the values and P : required power kw n : input shaft min 1 T : required input shaft torque Nm Since the maximum power per jack for J2G is 2.3 kw from the table on page 7, the required power is not met. So the selection of J2G is inappropriate. Change the size No. to J3GH and perform the above calculatins again as follows. As the maximum power per jack for J3GH is 3.1 kw the required power is met. So this size No. shall be adopted. The following formula can also be used to obtain the required power. : jack efficiency
7 Screw jack Ball screw jack H L
8 J0G J1G J2G J3G JGA J4A J5A J6A JFA J7A Capacity kn Lifting screw diameter and lead mm Worm gear ratio Efficiency Maximum allowablepower per jack Required input at allowable load Maximum input at allowable load Allowable maximum input kw min 1 min 1 min 1 H / / / /3 L H L H L H L H L H L Approximate Weight (Without prevent key) kg (stroke:mm) (With prevent key) Grease charging quantity kg Prevent key torque N m Input shaft allowable overhang load N Input shaft no load torque b N m Troque coefficient a H L Speed coefficient c (screw lead per rotation H of input shaft) mm L Lifting screw forming Roll threading Machining Lifting screw cover material Rigid PVC Steel Remarks: 1) If the screw jack is used at input 1,000 min 1 or over, oil Iubrication is adopted. 2) The allowable overhang load is obtained by the formula below. Overhang load = Input torque (N m) Radius of pulley, sprocket, etc. 3) In the presence of impact or Vibration, the selflocking function does not work in some cases. Then, the use of brake must be considered. 4) The service temperature ranges for standard products are 15 to + C for JOG to JGA and 15 to + C for J4A to J7A. If these ranges are exceeded, we can meet your requirements at your option. Please consult us. 5) As the lifting screw end is not locked, do not use the jack outside the service ranges. 6) Allowable loads of 2 kn and 4 kn are also available. Please refer to special bulletin (J005). 7) If special accuracy, grade, etc., are necessary, please consult us.
9 Reduction ratio H The size No. can be selected from the graph based on the lifting load and lifting screw speed. Lifting load (kn) Reduction ratio H Lifting screw speed (mm/min) Lifting load (kn) Lifting screw speed (mm/min)
10 Allowable buckling load (kn) Allowable buckling load (kn) Allowable buckling load (kn) (N) Emodulis of longitudinal elasticity J0G: G 16.0 J 1 G :.0 J2G: G 32.0 J 3 G : 39.5 JGA: 44.5 J 4 A :.5 J5A: 68 J6A:101 JFA:115 J 7 A : 129
11 Allowable side force of liftingtype screw jack: N (If bellows are used, the values for one size No. above are applicable.) Stroke mm Allowable side force of suspendingtype screw jack: N (If bellows are used, the values for one size No. above are applicable.) (N) Stroke mm (N)
12 Stroke Symbol A A A L L H If the stroke exceeds 0, please consult us Symbol T H T J T K T L T M T N J 0 G J 1 G J 2 G J 3 G J G A J 4 A J 5 A
13 J 1 G Symbol A 155 with ( Prevent key) (155) A A B A ø L = 5 B E 53 B F 106 B G 54 B H 73 C D 44.5 E F 92 G H 115 with ( Prevent key) (115) K 1 J 2 G 175 (175) ø L = (1) 230 J 3 G 185 (2) ø L = (170) 2 J G A 2 (270) ø55 L = (210) 2 J 4 A 2 (305) ø63 L = (244) J 5 A 2 (410) 70 ø85 L = (339) 3 L ( ) with Prevent key L H with ( Prevent key) M N P Q S T U V W Z Stroke + 55 ( 55) 170 (170) M Stroke + ( ) 185 (185) M Stroke + ( ) 196 (230) M Stroke + (1) 2 (170) M Stroke + 65 ( 65) 2 (309) M Stroke + 75 (175) 285 (514) M Symbol A Stroke J 1 G 195 (195) J 2 G 215 (215) J 3 G 2 (2) J G A 265 (315) J 4 A 285 (5) J 5 A 3 (465) (230) 0 (0) 2 (295) (3) 3 (3) 370 (0) A A (270) 270 (270) 2 (2) 2 (2) (3) (3) 3 (3) 3 (3) (430) 3 (430) (5) 410 (5) 1 L (265) (175) Symbol T A T B T C T D T E T F T G J 0 G J 1 G 70 J 2 G J 3 G J G A 1 85 J 4 A J 5 A B D (365) 365 (465) 465 (565) 565 (865) 865 (665) 1065 (865) 275 (275) 375 (475) 475 (675) 575 (675) 875 (875) 1075 (875) 1
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15 Grease fitting Stroke Size No, Direction L U L I L U L I L U L I L U L I Grease fitting Table of dimensions: Symbol J 0 G J 1 G J 2 G J 3 G J G A J 4 A J 5 A A A øl= 4 øl = 5 øl = 8 øl = 10 ø55l = 10 ø63l = 12 ø85l = 16 A B A C B A B B For dimensions of Type J6A and larger, please consult us. B C 63 1 B D B E Z d 9 (M 8) 11 (M10) 14 (M12) 18 (M16) (M) (M) 26 (M24) C A C B C C C D (Unit: mm) C E 70 C F
16 Table of dimensions Size Type Type Type Type 4 Dimensions R K AJ R K AJ R K AJ R K AJ J 0 G 1 95 J 1 G J 2 G J 3 G * The grip size for Type only is.
17 Item Type Allowable load (KN) Lifting screw diameter () Lifting screw lead (mm) Ratio Efficiency Please designate code No. (size No. type) Example: " BA000" (" BA00, Iifting screw diameter mmand lead 4 mm" ) Symbol A B C D E F G H K L M N P S T U V W AA AB AC AD AK Type Symbol R J Size Type 12 Type 18 Type 24
18 Capacity Lifting screw diameter and lead Worm gear ratio Efficiency Maximum allowable power per jack Required input torque N m Nm for allowable load Worm rotation per 10mm of stroke Holding torque Approximate weight (stroke: mm) N m Nm Grease charging quantity Prevent Key torque Input shaft allowable oberhang load Input shaft no load torque Torque coefficient Speed coefficient c (screw lead per rotation of input shaft) mm Lifting screw forming Lifting screw cover material a kn KN ø mm H L H L kw H L H L H L kg kg Nm N m N Nm N m H L H L J 0 B J 1 B J 2 B J 3 B J 4 B Roll threading Machining Rigid PVC Steel 3 J 5 B J 6 B J F B J 7 B ) The maximum input rotational frequency is 1,0 min 1. If the jack is used at input 1,000 min 1 or over, oil lubrication is adopted. Input torque (Nm) Radius of pulley, sprocket, etc. B
19 Lifting load (kn) Lifting load (kn)
20 Allowable buckling load (kn) Allowable buckling load (kn) Allowable buckling load (kn) (N) Emodulis of longitudinal elasticity J0B: 17.5 J1B: 21.4 J2B: 31.2 J3B: 39.6 J4B: 53.0 J 5 B : 70.5 J6B: 88.3 JFB:106.4 J7B:123.7
21 Expected traveling distance (m) =Stroke (m) 2 number of reciprocations/day 365 days expected number of years Load (kn) Example of table lifter using ball screw jacks
22 Stroke Symbol 0 A A A L L H If the stroke exceeds 0, please consult us Symbol T H T J T K T L T M T N J 0 B J 1 B J 2 B J 3 B J 4 B J 5 B
23 Symbol A A A J 1 B J 2 B J 3 B J 4 B J 5 B 5 85 B A ø L = 8 ø36 L = 10 ø L = 12 ø L = 16 ø L = B E B F B G B H B J C D E F G H K L Stroke + Stroke + Stroke + Stroke + Stroke L H M N P Q S 15 T M M 2 M32 2 M 2 M 2 U V W Z Symbol Stroke J 1 B J 2 B J 3 B J 4 B J 5 B A A A Symbol J 0 B J 1 B J 2 B J 3 B J 4 B J 5 B L T A T B T C T D T E T F T G B D
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25 Stroke Direction L U (Unit: mm) J 0 B J 1 B J 2 B J 3 B L I L U L I L U L I L U L I We can manufacture lifting screws of lengths other than those shown above. Please consult us. Drawing of dimensions: (Unit: mm) Symbol J 0 B J 1 B J 2 B J 3 B J 4 B J 5 B A A A B A C B A B B ø L = 5 ø L = 8 ø 36 L = 10 ø L = 12 ø L = 16 ø L = For dimensions of Type J6B and larger, Please consult us. B C B D B E B F B G d C A C B C C C D C E C F
26 2) They can be used at highspeed rotation (1,0 min 1 maximum). Symbol J0G ( B ) J1G ( B ) J2G ( B ) J3G ( B ) JGA J4A ( B ) J5A ( B ) J6A ( B ) JFA ( B ) J7A ( B ) (Unit: mm) A B
27 J0G J0B J1G J1B J2G J2B J3G J3B JGA J4A J4B J5A J5B J6A J6B JFA JFB J7A J7B A B 2 Train Type B' 4 Train Type C 2 Train Type C' 2 Train Type Setting direction symbols Geared limit switch setting procedure 1 Remove the cover. Once reached to the setting position, 5 stop the equipment, then make sure the white lines in line Raise the center of stopper with pushing it. (This enable the setting button to be pushed.) Raise the "A" button into locked position with pushing it. (This will release the internal clutch engagement. Make sure that the white lines in the window are in line. If it is not in line, repeat above setting procedure again. ) Turn on the equipment and operate to the setting position. Recover the "A" button into the original 6 position Make sure the operation. Put the screw jack back slightly, then operate to the set position. Set "B" button as same as "A". Once confirmed ""A" & "B" operation, return the stopper. Put the cover back.
28 J = J(H) + J(C1) + J(GR) + (J(C2) + J(JACK))(1/i) 2 Further, the necessary braking torque is calculated from the stop time and the J of the driving rotary body. J: total of J in terms of motor shaft J(H): J of motor with brake J(C1): J of coupling on motor side J(C2): J of coupling on jack side J(GR): J in terms of the input shaft of intermediate speed reducer J(JACK): J in terms of the worm shaft of jack i: reduction ratio of intermediate speed reducer T J N T t Total braking torque in terms of motor shaft Nm N motor min 1 T(L) load torquenm
29 Unit Nm J0G(B) J1G(B) J2G(B) J3G(B) JGA J4A(B) J5A(B) J6A(B) JFA(B) J7A(B)
30 J 0 G J 1 G J 2 G J 3 G J G A J 4 A J 5 A J 6 A J F A J 7 A Indication B C D E F G H K M N P Q S W d Bolt size J 0 B M10 J 1 B M10 J 2 B M16 J 3 B M M J 4 B M24 J 5 B M30 J 6 B M42 J F B M42 J 7 B M52
31 one for 2 kn and one for 5 kn. Main specifications Item Allowable load kn Lifting screw diameter Worm gear ratio Efficiency Maximum power per Approximate mass (stroke: mm) JMGH JSGH JSGL Main specifications Item JMR JSR Standard capacity kn Rack diameter Rack lead per revolution of input shaft Efficiency Maximum speed
32 Screw Ball screw Rack Your company name: When you inquire for jacks, please copy this inquiry specification and fill it up. Jack Inquiry Specification Customer name Date: User name Tel: Name of person in charge Fax: Machinery name Purpose of use Necessary function Lifting Transfer Tilting Pushing up Opening Adjustment Sustention Constantamount Load conditions Operating conditions Service conditions STATIC LOAD DYNAMIC LOAD Total maximum load kn Number of jacks Maximum load per jack kn Total maximum load kn Number of jacks kn Maximum load per jack kn Load direction Compression Tension Both direction Mounting conditions in the case of compressive load Jack fixed Shaft end free Jack supported Shaft end supported Jack fixed Shaft end supported Lateral load None Applied kn Offset None Applied mm Lifting screw direction Upright Inverted Lifting screw prevent key Necessary Not necessary Lifting screw bellows Necessary Not necessary Lifting screw end shape Screw end Plain end Clevis Disc Required stroke mm Driving source Manual With brake Geared motor Without brake Electric motor Hydraulic motor Air motor Power kw p Hz Driving shaft rotation frequency min 1 Jack input rotational frequency min 1 Worm reduction ratio i == Lifting screw lead L == mm Lifting screw speed mm/min Limit switch Necessary Not necessary 2row type (2TR) 4row type (4TR) Service frequency Hr/day reciprocations in minutes reciprocations/day hours m/day Operating days days/month days/year Expected life Service environment Indoor Outdoor Very dusty Rather dusty Not dusty Ambient temperature range C to C Impact and Vibration Quiet operation Some impact and vibration Great impact and vibraton Consideration of corrosion resistance Not necessary Stainless steel lifting screw must be used (SUS 304) Selection of type and specification Type Specification Number of jacks Date of delivery Head Office Sales Head quater 7 Kiriharacho, Fujisawashi, Kanagawaken, 2 Japan NOF Yokohama Nishiguchi Building Kitasaiwai1 chome, Nisiku, Yokohama Japan Telephone : Facsimile : BULLETIN R301F AS