POLE WHEELS. Where the shaft is very large a cost-effective alternative is to add a pole band (see following section).
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1 A pole wheel on the target shaft is required when using contactless sensors to generate a signal. Often an existing gear wheel can be used but where none is present a special gear, slotted or holed disk would be added. Where the shaft is very large a cost-effective alternative is to add a pole band (see following section). Other existing parts such as clutches, flanges or shafts, to which slots, holes or pegs can be added may also be suitable as the pole wheel. See notes on pole wheel geometry. TE CONNECTIVITY SENSORS /// 09/07 Page
2 Pole wheel sensing This is usually via radially mounted sensors (occasionally via axial mounting). All mounting and operational tolerances should be taken into account when determining the sensor/pole wheel air gap. ln the case of axial mounting the often considerable axial shaft play should be allowed for. To maintain a relatively constant mark: space ratio of the sensor output signal during rotation of the pole wheel, the pole wheel/sensor air gap should be kept as small as possible. Material Sensors that operate on the principle of changes to the magnetic flux require a pole wheel out of ferromagnetic material (iron, steel, castings). Stainless steel and plating with 8 % CrNi are not suitable. For certain applications (e.g. in turbochargers or for Sen sing with a large air gap) pole wheels having permanent magnets can be used. HF sensors require a pole wheel out of any metallic material. Target geometry For optimum signal generation, pole wheels having an involute gear form should ideally be used, or alternatively slotted or holed disks. Stamped sections (pole bands), bolts and screw heads are also possibilities. lt must however be ensured, that the air gap between the part and the sensor remains the same. For optimum sensing the following is recommended: Run out and float to be kept to a minimum (< 0. mm or < 0% of the air gap). Holes or slots to be within the dimensions and gaps shown in the adjacent drawings (recommended values underlined). Holes (slots) to be within the Limits shown in the adjacent drawings or corresponding to the tooth height for the gear module specified. TE CONNECTIVITY SENSORS /// 09/07 Page
3 Geometries relationships with disk pole wheels The following relationships are valid for involute gear wheels: Pitch circumference Uo [mm] π do [mm] with then pitch p [mm] defined as = Tooth center spacing on the pitch diameter and pole count = z Pitch circumference Uo [mm] = Z p [mm] with then Pitch diameter do[mm] = Z p [mm] / π module[mm] defined as = p / π Pitch diameter do[mm] = Z module [mm] For optimum power transmission in a gearbox, the pitch diameter for standard gear wheels having involute gear form is: do dk df p Z m h hf hk b s pitch diameter outer diameter tooth base diameter pitch number of poles or teeth module tooth height tooth base tooth height tooth width tooth thickness hence: Outer diameter dk [mm] = pitch diameter + module [mm] = (Z + ) module [mm] The following geometric relationships are valid for gear wheels: = = = + module[mm] = dk / (Z + ) Extract from DIN 780, standard module series: ; 0.35; 0.; 0.5; 0.6; 0.7; 0.8; 0.9;.0;.5;.5;.75;.0;.5;.5;.75; 3.0; 3.5; 3.5; 3.75;.0;.5; 5.0; 6.0; 7.0; Pitch (inch) = (Z + ) / dk (inch) = (Z + ) 5. / dk [mm] = 5. / module [mm] TE CONNECTIVITY SENSORS /// 09/07 Page 3
4 50 One piece pole wheels without boss, Series FTP P M D H Number of teeth Module External diameter Tooth width BN = Standard bare (H7 tolerance) B = Special bare range Dimensions in mm. Typ Part Nr. p M D H BN B... [kg] FTP 5/ FTP 5/ FTP 5/ FTP 5/80 FTP 5/0 FTP 5/ FTP 5/ FTP 5/ FTP 590 FTP 5/ FTP5/ FTP5/ FTP5/5 FTP5/ Extra fixing holes 6F-69 6F-650 6F-65 6F-65 6F-653 6F-65 6F-655 6F-656 6F-657 6F-658 6F-659 6F-6 6F-66 6F One piece pole wheels with boss, Series FTP 5 p = Number of teeth M = Module D = External diameter H = Tooth width U = Boss diameter T = Boss width BN = Standard bare (H7 tolerance) B... = Special bare range F = Thread SW = Allen key size for the fixing screw Dimensions in mm. TE CONNECTIVITY SENSORS /// 09/07 Page
5 Type Part. Nr. P M D H U T BN 8.. F SW[kg] 6G M3.5 6G M5.5 6G G M G M 6.0 FTP 53/ FTP53/ FTP 53/ FTP 53/80 FTP 53/0 FTP 53/ FTP 53/ FTP 53/ FTP 5390 FTP53/ FTP 53/ FTP53/ FTP 53/5 FTP 53/ 6G-66B 6G-669 6G-670 6G-67 6G-67 6G-673 6G-67 6G-675 6G M3 M5 M0 M M5 M0 M Two-piece pole wheels with boss, Series FTP 50 P... = M... = D... = H... = U... = T... = B... = Number of teeth Module External diameter Tooth width Boss diameter Boss width Special bore range F = Thread SW = Allen key size for the fixing screw Type Part Nr. p M D H u T B... F SW [kg] FTP 5/ FTP 5/80 FTP 5/0 6H-679 6H-680 6H M0 M 6 0 FTP5/ FTP5/90 FTP 5/ FTP 5 FTP 5/5 FTP 5/ 6H-68 6H-683 6H-68 6H-685 6H-686 6H M0 M M0 M TE CONNECTIVITY SENSORS /// 09/07 Page 5
6 Two-piece pole wheels with flange, Type Part Nr. Module FTP 50/Flange type 6N FTP 50/Flange type 6N FTP 50/Flange type 6N FTP 50/Flange type 6N FTP 50/Flange type 6N FTP 50/Flange type 6N Order details Model number, exact shaft diameter. Other dimensions CONTACT US Tel jaquet.info@te.com te.com/sensor solutions JAQUET, TE Connectivity, and TE connectivity (logo) are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity s obligations shall only be as set forth in TE Connectivity s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. 07 TE Connectivity Ltd. family of companies All Rights Reserved. TE CONNECTIVITY SENSORS /// 09/07 Page 6
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