BS ISO 13050-2014 Synchronous belt drives Metric pitch curvilinear profile systems G H R and S belts and pulleys《同步带传动带 公制螺距曲线系统G H R和S皮带和滑轮》.pdf

1、BSI Standards PublicationBS ISO 13050:2014Synchronous belt drives Metric pitch, curvilinear profilesystems G, H, R and S, beltsand pulleysBS ISO 13050:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13050:2014. Itsupersedes BS ISO 13050:1999 which is withd

2、rawn.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/10, Belts b) belt tooth pitch spacing;c) belt length and width dimensions and tolerances;d) belt length measurement specifications;e) pulley groove dimensions and tolerances;f) pulley diameter and width dimensions a

3、nd tolerances;g) pulley quality specification.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of

4、 the referenced document (including any amendments) applies.ISO 254, Belt drives Pulleys Quality, finish and balance3 Synchronous belt drive system typesFour profile systems and 14 profiles for curvilinear synchronous drives are standardized.Profile system G Profile system RProfile G8M (Tooth/groove

5、 pitch 8mm)Profile R3M (Tooth/groove pitch 3mm)Profile G14M (Tooth/groove pitch 14mm)Profile R5M (Tooth/groove pitch 5mm)Profile R8M (Tooth/groove pitch 8mm)Profile R14M (Tooth/groove pitch 14mm)Profile R20M (Tooth/groove pitch 20mm)INTERNATIONAL STANDARD ISO 13050:2014(E) ISO 2014 All rights reserv

6、ed 1BS ISO 13050:2014ISO 13050:2014(E)Profile system H Profile system SProfile H3M (Tooth/groove pitch 3mm)Profile S8M (Tooth/groove pitch 8mm)Profile H5M (Tooth/groove pitch 5mm)Profile S14M (Tooth/groove pitch 14mm)Profile H8M (Tooth/groove pitch 8mm)Profile H14M (Tooth/groove pitch 14mm)Profile H

7、20M (Tooth/groove pitch 20mm)4 Belt nomenclatureA belt is identified as follows:a) the belt length or pitch length in millimetres, e.g. 1 400 mm;b) the profile system, e.g. “G”,“H”, “R”, or “S”;c) the pitch or tooth pitch in millimetres, e.g. 14 mm;d) the width or belt width in millimetres, e.g. 40

8、mm (for profile system S, the width in millimetres 10);e) double-sided belts are designated by adding the letter “D” before the designation of the profile system.EXAMPLE A synchronous belt in the above profile systems of 1 400 mm length, 14 mm pitch, and 40 mm wide is identified as follows:Profile s

9、ystem G 1400-G14M-40 1400-DG14M-40Profile system R 1400-R14M-40 1400-DR14M-40Profile system H 1400-H14M-40 1400-DH14M-40Profile system S 1400-S14M-400 1400-DS14M-4005 Pulley nomenclatureA pulley is identified as follows:a) the letter “P” indicates a pulley;b) the number of grooves, e.g. 30;c) the pr

10、ofile system, e.g. “G“, “H”, “R”, or “S”;d) the pitch or groove pitch in millimetres, e.g. 14 mm;e) the width or belt width in millimetres, e.g. 40 mm (for profile system S, the width in millimetres 10).2 ISO 2014 All rights reservedBS ISO 13050:2014ISO 13050:2014(E)EXAMPLE A pulley in the above pro

11、file systems of 30 grooves, 14 mm pitch, and 40 mm wide is identified as follows:Profile system G P30-G14M-40Profile system R P30-R14M-40Profile system H P30-H14M-40Profile system S P30-S14M-4006 Profile system G6.1 Belt dimensions and tolerances6.1.1 Belt tooth dimensionsThe nominal belt tooth dime

12、nsions are given in Table 1 and shown in Figure 1.Table 1 Nominal tooth dimensionsDimensions in millimetresProfile Belt pitch bghgR1 Ao aaxo L1G8M 8 5,200 3,43 0,74 2,29 0,80 0,379 1,378G14M 14 9,100 6,00 1,30 4,00 1,40 0,661 2,422aa is the belt design pitch differential.YAoL1XbxoR1ghgaFigure 1 Toot

13、h dimensions Profile system G ISO 2014 All rights reserved 3BS ISO 13050:2014ISO 13050:2014(E)Detail of tooth faceFor Ao x xo:yInAox Ao xxAo=+()()/ /2211 (1)wherexo corresponds to y = hg;L1 is equal to bg - 2(Ao-xo).NOTE 1 Indicated base tooth profile remains constant in all parts.NOTE 2 “O” referen

14、ce points remain in contact with the part outer surface generated by part radius of curvature.NOTE 3 Groove profile bottom surface in circular part form is an arc whose chordal distance is L1 and whose radius originates at the part centre.6.1.2 Belt widths and tolerancesBelt widths and tolerances ar

15、e given in Table 2.Table 2 Widths and width tolerancesDimensions in millimetresProfile Nominal belt widthTolerance on width for belt pitch lengthsUp to and including 840 mmOver 840 mm and up to and including 1 680 mmOver 1 680 mmG8M12 +0,8 0,8 +0,8 1,2 +0,8 1,221 +0,8 0,8 +0,8 1,2 +0,8 1,236 +0,8 0,

16、8 +0,8 1,2 +0,8 1,262 +1,2 1,2 +1,2 1,6 +1,6 1,6G14M20 +0,8 0,8 +0,8 1,2 +0,8 1,237 +0,8 0,8 +0,8 1,2 +0,8 1,268 +1,2 1,6 +1,6 1,6 +1,6 2,090 +1,6 1,6 +1,6 2,0 +2,0 2,0125 +2,4 2,4 +2,4 2,8 +2,4 3,26.1.3 Pitch length measurementSee Annex A for tolerances and Annex B for the relationship between the

17、centre distance and the belt pitch length.6.1.3.1 Measuring fixture (see Figure 3)The pitch length of a synchronous belt shall be determined by placing the belt on a measuring fixture composed of the following elements.6.1.3.1.1 Two pulleys of equal diameter, as specified in Table 3, of the proper b

18、elt profile and having standard tooth space dimensions. These pulleys should be made to the tolerances shown in Table 3. One pulley shall be free to rotate on a fixed-position shaft, while the other shall be free to rotate on a moveable shaft to permit the centre distance to change.4 ISO 2014 All ri

19、ghts reservedBS ISO 13050:2014ISO 13050:2014(E)6.1.3.1.2 Means of applying a total measuring force to the moveable pulley.6.1.3.1.3 Means of measuring the centre distance between the two pulleys with the necessary degree of accuracy for centre distance measurement.6.1.3.2 Total measuring forceThe to

20、tal measuring force to be applied for measuring belts is given in Table 4.6.1.3.3 ProcedureIn measuring the pitch length of a synchronous belt, the belt should be rotated at least two revolutions to seat it properly and to divide the total force equally between the two spans of the belt. The pitch l

21、ength shall be calculated by adding the pitch circumference of one of the pulleys to twice the measured centre distance.21Key1 centre distance2 total measuring forceFigure 2 Diagram of fixture for measuring pitch lengthTable 3 Belt length measuring pulleysDimensions in millimetresProfileNumber of gr

22、oovesPitch cir-cumferenceOutside diameteraRadial runoutF.I.M.bAxial runoutF.I.M.bG8M 34 27284,9800,0130,013 0,025G14M 40 560175,4540,0250,013 0,051a Pulleys outside of the diameter tolerance range specified can be used if the resulting belt length measurements are corrected for the actual pulley dia

23、meters.b Full indicator movement.NOTE The number of pulley teeth specified in Table 3 determines the recommended sizes for measuring the belt pitch length. Practically, other sizes of pulleys could be used provided they have the same number of teeth, and meet the dimensional requirements of Table 3.

24、 ISO 2014 All rights reserved 5BS ISO 13050:2014ISO 13050:2014(E)Table 4 Total measuring forceForces in newtonsProfileBelt width mm12 20 21 36 37 62 68 90 125G8M 267 467 756 1223 G14M 1179 2046 3447 4315 56276.2 Pulleys, profile system G6.2.1 GeneralSee Annex C for tolerances.The pulley is character

25、ized by a curvilinear groove profile. This groove profile is defined as the profile formed by the generating tool rack form required to machine-finish the curvilinear profile. The profile is different for each pulley diameter, but can be closely approximated by a nominal groove profile over specifie

26、d ranges of number of grooves.6.2.2 Generating tool rackDimensions and tolerances for the generating tool rack for pulleys with profile system G are given in Table 5 and shown in Figure 3.XXXXXXXXXP0P1P2P3P4P5P6P7P8r1r2r4r5r6r7r8PhXr3br(0,0)Figure 3 Pulley generating tool rack dimensions6 ISO 2014 A

27、ll rights reservedBS ISO 13050:2014ISO 13050:2014(E)Table5 Pulley generating tool rack dimensionsDimensions in millimetresProfileNum-ber of groovesPbhrP0(X,Y)r1P1(X,Y)r2P2(X,Y)r3P3(X,Y)r4P4(X,Y)r5P5(X,Y)r6P6(X,Y)r7P7(X,Y)r8P8(X,Y)XG8M22 to 277,7843,5413,48000,8422,7100,4331,4592,5670,7888,8332,4271,

28、2755,8821,8412,5803,1231,3243,2351,4500,9793,4910,5520,8563,5410,85628 to 377,8433,5133,44800,8282,7460,3481,0862,5780,7159,4872,4471,1935,9011,8942,4863,1521,3673,1771,5051,0093,4470,6400,8433,5130,84338 to 587,8913,4873,42600,8192,8290,2320,9182,5830,6689,9642,4621,1265,9211,9402,4023,1811,4103,11

29、91,5621,0243,4140,6690,8313,4870,83159 to 897,9303,4673,41200,8182,9430,1300,8462,5860,63210,3852,4701,0825,9321,9782,3283,2051,4433,0721,6141,0393,3840,7250,8203,4670,82090 to 2508,0403,4523,55800,8463,0400,1640,9572,7510,5121,9842,6170,8738,2752,3451,7245,1111,9782,4953,0421,5593,0561,7251,1813,35

30、90,8050,9513,4520,951G14M27 to 2913,6746,1746,00901,4614,7770,6842,1884,5361,2229,7284,4051,69611,8673,7683,4879,6253,1614,6196,1142,4865,4893,3381,8086,0411,5111,5056,1741,50530 to 3513,7256,1475,98601,4534,7380,7172,2064,5191,2449,4484,4181,62611,9193,8003,4089,5843,2134,5316,1292,5225,4363,4331,8

31、505,9901,5881,4966,1471,49636 to 4513,7806,1175,96101,4464,6850,7802,2414,4901,31213,0513,9513,04110,1153,2974,3876,1632,5825,3563,4891,8835,9421,6721,4856,1171,48546 to 6013,8316,0905,94001,4374,6520,8152,1804,4841,31313,0913,9712,98310,0923,4174,1726,2222,6495,2673,5411,9135,8991,7451,4766,0901,47

32、661 to 9013,8796,0655,91901,4294,6080,8832,1514,4841,28513,1833,9882,92810,0673,4634,0816,2362,7025,1933,5861,9405,8571,8121,4676,0651,46791 to 14913,9276,0405,90001,4204,5680,9552,5864,4761,29213,3044,0142,84810,0513,5053,9976,2452,7465,1283,6291,9695,8151,8721,4586,0401,458150 to 25013,9566,0245,8

33、8701,4144,5371,0315,7574,4581,35213,1504,0302,79910,0513,5333,9386,2492,7015,1713,6521,9835,7921,9081,4536,0241,453 ISO 2014 All rights reserved 7BS ISO 13050:2014ISO 13050:2014(E)6.2.3 Pulley groove profile dimensions and tolerancesDimensions and tolerances for the pulley groove profile for G8M and

34、 G14M pulleys are given in Table 6 and shown in Figures 4 and 5.Table 6 Pulley groove profile dimensionsDimensions in millimetresProfile Number ofgroovesbghgR1Ao xo L1 aG8M 22 to 8990 to 2505,4005,6603,433,430,800,802,292,290,3790,3791,601,600,80G14M 28 to over 9,450 6,00 1,40 4,00 0,661 2,80 1,40hY

35、AoL1XbxoR1ggFigure 4 Pulley groove profileFor Ao x xo:yInAox Ao xxAo=+()()/ /2211 (2)wherexo corresponds to y = hg;L1 is equal to bg - 2(Ao-xo).NOTE 1 Indicated base tooth profile remains constant in all parts.NOTE 2 “O” Reference points remain in contact with the part outer surface generated by par

36、t radius of curvature.NOTE 3 Groove profile bottom surface in circular part form is an arc whose chordal distance is L1 and whose radius originates at the part centre.8 ISO 2014 All rights reservedBS ISO 13050:2014ISO 13050:2014(E)Key1 pulley outside diameterNOTE The true profile of the groove sides

37、 can only be produced by plotting the function associated with the cross-section.Figure 5 Groove profile Tolerance bands Millimetres6.2.4 Pulley outside diametersPulleys outside diameters for the standard pulleys are given in Table 7. The relationship of the pulley outside and pitch diameters is ill

38、ustrated in Figure 6 and Formulae (3) and (4).PitchdiameterNo of grooves pulleypitch=.pi(3)Outside diameter = Pitch diameter - 2a (4)where a is given in Table 1.Key1 pitch 4 pitch diameter2 belt pitch line 5 outside diameter3 belt tooth 6 pulley grooveFigure 6 Pulley dimensions ISO 2014 All rights r

39、eserved 9BS ISO 13050:2014ISO 13050:2014(E)Table 7 Standard pulley sizesDimensions in millimetresNumberofgroovesProfileG8M G14MPitchdiameterOutsidediameterPitchdiameterOutsidediameter22 56,02 54,42 25 63,66 62,06 28 71,30 69,70 124,78 121,98 29 129,23 126,43 30 76,39 74,79 133,69 130,89 31 138,15 13

40、5,35323334353637383981,4986,5891,6796,7779,8984,9890,0795,17142,60147,06151,52155,97160,43164,88169,34173,80139,80144,26148,72153,17157,63162,08166,54171,0040424344454850535660101,86106,95114,59122,23127,32134,96142,60152,79100,26105,35112,99120,63125,72133,36141,00151,19178,25191,62196,08200,54213,

41、90222,82236,19249,55267,38175,45188,82193,28197,74211,10220,02233,39246,75264,586364677172758090160,43162,97170,61180,80190,99203,72229,18158,83161,37169,01179,20189,39202,12227,58280,75285,21298,57316,40320,86334,23356,51401,07277,95282,41295,77313,60318,06331,43353,71398,2710 ISO 2014 All rights r

42、eservedBS ISO 13050:2014ISO 13050:2014(E)NumberofgroovesProfileG8M G14MPitchdiameterOutsidediameterPitchdiameterOutsidediameter112140168192180192200224285,21356,51488,92458,37570,41283,61354,91487,32456,77568,81499,11623,89748,66802,14855,62891,27998,22496,31621,09745,86799,34852,82888,47995,426.2.5

43、 Pulley widthThe standard nominal pulley width, and the minimum actual pulley width required, bffor flanged pulleys, bffor unflanged pulleys are given in Table 8 and shown in Figure 7. Users are advised that the values given for bfapply also to pulleys with only one flange (see Annex D).Table 8 Stan

44、dard pulley widthsDimensions in millimetresProfileStandard nominalpulley widthMinimum pulley widthFlanged bfUnflanged bfG8M122136621423406622304774G14M2037689012526447699134355285107143The minimum unflanged pulley width can be reduced when the alignment of the drive can be controlled, but shall not

45、be less than the minimum flanged pulley width.Table 7 (continued) ISO 2014 All rights reserved 11BS ISO 13050:2014ISO 13050:2014(E)b1 2fbfKey1 flanged pulley2 unflanged pulleyFigure 7 Minimum pulley width7 Profile system H7.1 Belt dimensions and tolerances7.1.1 Belt tooth dimensionsThe nominal belt

46、tooth dimensions are the same for single-sided and double-sided belts; they are given in Table 9 and shown in Figure 8.Table 9 Nominal tooth dimensionsDimensions in millimetresProfile Pitch hshdhtP1(X, Y)P5(X, Y)r1P2(X, Y)P6(X, Y)P3(X, Y)P7(X, Y)r2P4(X, Y)P8(X, Y)aaH3M 3 2,4 1,211,14 0,00 0,300,83 0

47、,300,83 0,35 0,860,00 1,21 0,381DH3M 3 3,2 1,14 0,760,30 0,83 1,060,83 1,110,86 0,00 1,970,381H5M 5 3,8 2,081,850,00 0,411,440,421,440,53 1,500,002,08 0,572DH5M 5 5,3 1,851,140,41 1,441,561,441,671,50 0,003,220,572H8M 8 6,0 3,383,300,00 0,762,550,652,471,17 2,590,003,38 0,686DH8M 8 8,1 3,301,370,76

48、2,552,022,472,542,59 0,004,750,686H14M 14 10,0 6,025,780,00 1,424,361,294,301,97 4,460,006,02 1,397aa is the belt design pitch differential.12 ISO 2014 All rights reservedBS ISO 13050:2014ISO 13050:2014(E)Profile Pitch hshdhtP1(X, Y)P5(X, Y)r1P2(X, Y)P6(X, Y)P3(X, Y)P7(X, Y)r2P4(X, Y)P8(X, Y)aaDH14M 14 14,8 5,782,791,42 4,364,084,304,764,46 0,008,811,397H20M 20 13,2 8,688,340,00 2,036,321,846,222,90 6,400,008,68 2,159aa is the belt design pitch differential.P4P2P3P1P8P7P6P5P4P3P2P1Xr21rXXXXXXXXXXX1r(0,0)r