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1、J I S BXl1856 93 4933608 0525683 bL0 = JIS JAPANESE INDUSTRIAL STANDARD Synchronous belt drives- Pulleys JIS B 1 8 5 6 - 1 9 9 3 Translated and Published bY Japanese Standards Association UDC 621.85.051 Printed in Japan J I S E*l185b 93 m 4933608 0525b82 557 m In the event of any doubt arising, the
2、original Standard in Japanese is to be final authority. J I S B*i185b 93 W 4933b08 0525b83 493 W t UDC 621.85.051 JAPANESE INDUSTRIAL STANDARD J I S Synchronous belt drives - Pulleys B 1856-1993 1. Scope This Japanese Industrial Standard specifies pulleys produced by gear cutting machine, among the
3、synchronous pulleys (hereafter referred to as “pulleys“) working with the synchronous belts (hereafter referred to as “belts“) specified in JIS K 6372 and JIS K 6373. In addition, straight-sided teeth among the tooth profile specified in IS0 5294 are specified in Annex to this Standard. Further, as
4、to the pulleys of which type is of being fixed to the shaft also, using the pulleys and taper bushings manufactured by sintering, they should be preferable to apply this Standard as appropriate. Remarks 1. The standards cited in this Standard are as given in the following: JIS B O021 JIS B O102 JIS
5、B 0601 JIS B 1752 JIS B 7502 Micrometer callipers JIS K 6372 JIS K 6373 IS0 5294 2. The International standard corresponding to this Standard is as follows: IS0 5294 Synchronous belt drives - Pulleys Indications of geometrical tolerances on drawings Glossary of gear terms Surface roughness - Definit
6、ions and designation Methods of measurement for spur and helical gears Synchronous belts for general power transmission Synchronous belts for light duty power transmission Synchronous belt drives - Pulleys 2. Definitions B 0102 and the following definitions apply: For the purposes of this Standard,
7、the definitions given in JIS (1) pitch circle The circle to be the reference of working of belt with pulley, being outside the tip circle of pulley and corresponds to the position of pitch line (centre line of core wire of belt) of belt wound around the pulley, teeth on the pitch circle. the belt is
8、 composed of the curved surface based on the involute curve. ing with the belt is composed of the plane. (2) pitch (3) involute tooth profile (4) straight-sided tooth profile The length of circular arc between the centre lines of adjacent I The tooth profile of which tooth flank working with The too
9、th profile of which tooth flank work- J I S B*185b 93 = 4933608 0525684 32T Over 25.40 to 50.80 or under Over 50.80 to 101.60 or under 2 B 1856-1993 0.03 0.08 0.03 o. 10 3 . Classification types (l) according to the types of corresponding belt. The pulleys shall be classified into the following seve
10、n MXL, XXL, XL, L, H, XH, XXH Over 101.60 to 177.80 or under Over 177.80 to 304.80 or under Over 304.80 to 508.00 or under Over 508.00 to 762.00 or under Over 762.00 to 967.16 or under Note (l) These types coincide with the types specified in JIS K 6372 and JIS K 6373. 0.05 O. 13 0.05 O. 15 0.08 O.
11、18 0.08 0.20 0.08 0.23 4 . Performances 4 . 1 Appearance belt on the outer peripheral surface of the cylinder, and be free from harmful defects in use such as flaws, cracks, cavities and others. The pulleys shall have teeth working with the teeth of the 4.2 The pitch variation and the cumulative pit
12、ch deviation in an arbitrary section of 90, when measured in accordance with the method of 6.3, shall satisfy the requirements of Table 1 . Pitch variation and cumulative pitch deviation Table 1. Permissible values of pitch variation and cumulative pitch deviation Unit: mm Permissible values deviati
13、on Tip circle diameter of pulley do (2) 5.96 or over to 25.40 or under I 0.03 I 0.05 Note (2) See Fig. 3. 4.3 The parallelism of the teeth of the pulley in respect to the shaft bore centre line, when measured Parallelism of teeth in respect to shaft bore centre line t in accordance withthe method of
14、 6.4, shall satisfy the requirements of Table 2. J I S B*:185b 93 4933608 0525b85 2bb Nominal widths of pulley (s) MXL, XXL 3.2 to 6.4 XL, L, H, XH, XXH 025 to 150 3 B 1856-1993 Tolerance 0.03 Table 2 . Tolerances on parallelism Unit: mm - 400 500 0.05 - I 200 - 300 I 0.04 Over 254.00 to 967.16 or u
15、nder 0.25 + (Tip circle diameter do - 254.00) x 0.00051 4.4 Run-out of side face The run-out of the side face in respect to the shaft bore centre line of the pulley, when measured in accordance with the method of 6.5, shall satisfy the requirements of Table 3. Tip circle diameter of pulley do 5.96 o
16、r over to 203.20 or under Table 3. Tolerances on run-out of side face Unit: mm Tolerance on run-out (run-out of periphery) (6 0.13 Tip circle diameter of pulley d o I Tolerance on run-out (TIR) (4) Over 203.20 to 967.16 or under 5.96 or over to 101.60 or under I 0.10 0.13 + (Tip circle diameter do -
17、 203.20) x 0.00051 Over 101.60 to 254.00 or under I Tip circle diameter do x 0.001 4.5 respect to the shaft bore centre line of the pulley, when measured in accordance with the method of 6.6, shall satisfy the requirements of Table 4. Run-out of tip circle periphery The run-out of the tip circle per
18、iphery in Note (5 See JI$ B 0021. 4.6 Cylindricity of tip cylinder ed in accordance with the method of 6.8, shall satisfy the requirements of Table 5. The cylindricity of tip cylinder, when measur- J I S B+L85b 93 4933608 0525686 I T 2 m 3.2 to 6.4 - - 4 B 1856-1993 _ _ _ _ 025 to 050 0.01 075 to 15
19、0 0.02 200 * 300 0.04 Table 5 . Tolerances on cylindricity Unit: mm Nominal widths of pulley I Tolerance - MXL, XXL I XL, L, H, XH, XXH I 400 500 0.06 4.7 Surface roughness of teeth of the teeth of the pulley shall be 3.2a or 12.52 specified in JIS B 0601. The surface roughness (including tip surfac
20、e) 4.8 Balancing quality unbalanced mass on the outer periphery shall comply with the maximum toler- ance taking whichever the larger value, 0.2 % the mass of pulley or 5 g. How- ever, as to MXL and XXL, it shall be as agreed upon between the manufacturer and purchaser. The balancing quality of the
21、pulley expressed by the 5. Dimensions 5.1 shall be the involute tooth profile. The involute tooth profile shall be specified by Shape and dimensions of tooth profile The tooth profile of the pulley the cutter to generate the teeth, and the rack dimensions and tolerances of the cutter, when measured
22、by the method of 6.2, shall satisfy Table 6. Table 6. Rack dimensions and tolerances of cutter J I S B*:L85b 93 = 4933608 0525b87 039 Type MXL XXL 5 B 1856-1993 Number of teeth P* 9 hT g Yb 7i 2u(6) of pulley ( O f0.05 +O.os k0.03 f 0 . 0 3 (informative * O . 12 O 01 reference) 10 min. 23 max. 2.032
23、+0.008 28 0.64 0.61 0.30 0.23 O. 508 24 min. 20 0.67 10 min. 3.175-tO.008 25 0.84 0.96 0.30 0.28 O. 508 Table 6. (continued) XL L Unit: mm 10 min. 1 5.080k0.010 25 1.40 1.27 0.61 0.61 O. 508 10 min. 9.525IO. 012 20 2.13 I 3.10 0.86 0.53 O. 762 H XH XXH 14 min. 19 max. 12.700 +O. 016 20 2.59 i 4.24 1
24、.47 1 .O4 1.372 _. 20 min. 1.42 18 min. 1 22.225+0.020 20 6.88 7.59 2.01 1.93 2.794 18 min. 1 31.750+0.025 20 10.29 11.61 2.69 2.82 3.048 5.2 ber of teeth of pulley, pitch circle diameter () and tip circle diameter shall be in accordance with Table 7. The tip circle diameter shall be measured by the
25、 method of 6.7 and its toler- ances shall be in accordance with Table 8. Number of teeth, pitch circle diameter and tip circle diameter The num- Note (9 The pitch circle diameter shall be the value obtained from the following formula: where, dp ; pitch circle diameter (mm) Pt : pitch (mm) n : number
26、 of teeth JIS B*:L856 93 4933608 0525688 T75 152.84 159.92 166.99 222.34 232.45 242.55 174.07 181.14 188.22 195.29 209.44 252.66 262.76 272.87 282.98 303.19 6 B 1856-1993 Table 7. Number of teeth of pulley n, pitch circle diameter dp and tip circle diameter do Unit: mm MXL XXL XL L H XH I XXH m= Num
27、ber of teeth n 10 11 12 (13) 14 pip * J e liam$m do 5.96 6.61 7.25 7.90 8.55 - lp rirele diameter di - 9.60 10.61 11.62 12.63 13.64 Tip anlc diameter da 15.66 17.28 18.90 20.51 22.13 23.75 25.36 26.96 28.60 30.22 31.83 33.45 35.07 36.63 38.30 - - - tch cire16 am* 4 10.11 11.12 12.13 13.14 14.15 - it
28、ch c k C imneter 4 16.17 17.79 19.40 21 .o2 22.64 24.26 25.87 27.49 29.11 30.72 32.34 33.96 35.57 37.19 38.81 - ._ - Itch c i d iameter 4 - - 56.60 60.64 64.68 68.72 72.77 76.81 itch cirek ametar 4 I - - 155.64 162.71 169.79 Tip cide diameter d, Rp rde Eameter d a - - 55.22 59.27 63.31 67.35 71.39 7
29、5.44 79.48 83.52 87.56 91.61 95.65 - . . itch c i d Euneter 4 6.47 7.11 7.76 8.41 9.06 36.38 39.41 42.45 45.48 48.51 51.54 54.57 57.61 60.64 63.67 66.70 69.73 72.77 35.62 38.65 41.68 9.70 10.35 11.00 11.64 12.29 9.19 9.84 10.49 11.13 11.78 14.65 15.66 16.67 17.68 18.69 44.72 47.75 50.78 53.81 56.84
30、59.88 62.91 65.94 68.97 72.00 - 15.16 16.17 17.18 18.19 19.20 20.21 21.22 22.23 23.24 24.26 25.27 26.28 27.29 28.30 30.32 _ _ 19.70 20.72 21.73 22.74 23.75 24.76 25.77 26.78 27.79 29.81 _. . 80.85 84.89 88.94 92.98 97.02 12.94 13.58 14.23 14.88 15.52 12.43 13.07 13.72 14.37 15.02 - 219.29 229.40 239
31、.50 I . 16.17 16.82 17.46 18.11 19.40 15.66 16.31 16.96 17.60 18.90 40.43 42.04 43.66 45.28 48.51 39.92 41.53 43.15 44.77 48.00 75.80 78,83 81.86 84.89 90.96 75.04 78.07 81.10 84.13 90.20 101 .O6 105.11 109.15 113.19 121.28 99.69 103.73 i07.78 111.82 119.90 176.86 183.94 191.01 198.08 212.23 249.61
32、259.72 269.82 279.93 300.14 320.35 360.78 401.21 482.06 603.33 _ 32 36 40 48 60 20.70 23.29 25.87 31 .O5 38.81 46.57 _ 20.19 22.78 25.36 30.54 38.30 46.06 _ 31.83 35.87 39.92 48.00 60.13 72.26 . 51.74 58.21 64.68 77.62 97.02 116.43 51.24 57.70 64.17 77.11 96.51 115.92 97.02 109.15 121.28 145.53 i81.
33、91 96.26 108.39 120.51 144.77 181.15 129.36 145.53 161.70 194.04 242.55 291.06 339.57 388.08 - i27.99 144.16 i60.33 i92.67 l41.18 l89.69 338.20 386.71 - 226.38 254.68 282.98 339.57 424.47 509.36 594.25 679.15 848.93 _ 32.34 36.38 40.43 48.51 60.64 72.77 72 84 96 120 !18.30 154.68 - 217.53 253.92 - 7
34、24.61 845.88 967.16 346.14 Remarks: The number of teeth given in parentheses should preferably be not used as far as possible. Table 8. Tolerances on tip circle diameter do of pulley Unit: mm Tip circle diameter of pulley do I Tolerances I + O 5.96 or over to 25.40 or under + 0.08 I O Over 25.40 to
35、50.80 or under Over 50.80 to 101.60 or under I + 0.10 O JIS B*185b 73 4933608 0525687 901 Over 101.60 to 177.80 or under + 0.13 O Over 177.80 to 304.80 or under + 0.15 O Over 762.00 to 967.16 or under + 0.23 O Type MXL XXL XL L - H XH XXH Nomini of pulie For light load 3.2 4.8 6.4 3.2 4.8 6.4 _ _ .-
36、 7 B 1856-1993 Table 8. (continued) Unit: mm Tip circle diameter of pulley do I Tolerances + 0.18 I O Over 304.80 to 508.00 or under I + O Over 508.00 to 762.00 or under 5.3 Facewidths types according to the presence of the flange for each nominal width, and its minimum value shall be in accordance
37、with Table 9. Table 9. Minimum facewidth of pulley The facewidths of the pulley shall be classified into three Unit: mm widths 1 Minimum facewidths mor genera, Double flanged - 7 un b, I b, Single flanged 4.7 6.2 8.0 5.6 7.1 8.9 3.8 5.3 7.1 3.8 5.3 7.1 4.7 6.2 8.0 5.6 7.1 8.9 8.9 10.4 12.2 17.0 23.3
38、 29.7 . . - 025 031 037 7.1 8.0 8.6 I 9.5 10.4 11.3 14.0 0 : ; 20.3 1 O0 26.7 15.5 21.8 28.2 22.6 29.0 41.7 55.1 81.3 24.8 31.2 43.9 57.3 83.5 075 100 150 200 300 200 300 400 20.3 26.7 39.4 52.8 79.0 56.6 83.8 110.7 59.6 86.8 113.7 62.6 89.8 116.7 200 300 400 500 56.6 83.8 110.7 137.7 60.4 87.6 114.
39、5 141.5 64.1 91.3 118.2 145.2 J I S D*L85b 93 4933608 0525b90 623 e ( 0 ) Type a B 1856-1993 k (minimum t (informative value) reference) 5.4 Dimensions of flange in accordance with Table 10. The dimensions of the flange of the pulley shall be Table 10. Dimensions of flange (the shape other than the
40、dimensional symbols in the figure indicates an example) fi Break sharp corners Break sharp comers MXL XXL XL L 8 to 25 I 0.5 I 0.5 to 1.5 I 0.8 I 0.5 io 1.5 I 1.0 I 1 . 0 to 1 . 6 1.5 I 1.2 to 2 . 3 1 H I I 2.0 I 1.6 to 2.8 XH I I 4.8 I 4.0 to 5.0 1 6.1 1 4.0 to 6.3 Unit: mm s (informative reference
41、) O to 0.5 6. Testing methods 6.1 General ordinary temperature (20 f 15C). The measurements of 6.2 to 6 . 8 shall be carried out under the 6.2 Tooth profile cutter for generating by using a projector, shape measuring device and the like. As to the tooth profile, measure the rack shape of the I J I S
42、 EX1856 93 = 4933b08 0525b91 5bT = 9 B 1856-1993 6.3 and the cumulative pitch deviation in an arbitrary section of 90, measure the linear distance between the two points obtained by the intersection of the two tooth flanks corresponding to adjacent teeth of a pulley of which shaft bore has been fini
43、shed and the circle of an arbitrary diameter concentric with the pulley (larger than the root circle diameter and smaller than the tip circle diameter), or the size of an angle included by these points in respect to the centre of pulley in accordance with-the method of 3.1 of JIS B 1752, as appropri
44、ate, successively, and obtain the results by converting into the values on the pitch circle. Pitch variation and cumulative pitch deviation As to the pitch variation 6.4 lelism of the tooth of the pulley in respect to the shaft bore centre line, obtain the error of tooth trace direction in respect t
45、o the finished shaft bore centre line by the method in accordance with 5. of JIS B 1752 as appropriate, and consider this value to be the parallelism. Parallelism of tooth in respect to shaft bore centre line As to the paral- 6.5 Run-out of side face the shaft bore has been finished, allow the pulle
46、y to rotate being supported by the method given in Fig. 1, measure at the side face near the tooth part of the pulley, and obtain the size of run-out from the following formula: As to the run-out of the side face of a pulley, after A = B x - do w where, A : size of run-out (mm) B : TIR (4) at measur
47、ing point (mm) do : tip circle diameter of pulley (mm) X : distance from the shaft bore centre line of pulley to the measuring point (mm) Fig. 1 . Run-out of side face J I S Bx185b 93 W 4933608 0525692 4Tb W 10 B 1856-1993 6.6 ery of a pulley, after the shaft bore has been finished, allow the pulley
48、 to rotate being supported by the method given in Fig. 2, and measure the run-out at an arbitrary position at that time. Run-out of tip circle periphery As to the run-out of the tip circle periph- Fig. 2. Run-out of tip circle periphery 6.7 Tip circle diameter As to the tip circle diameter do of the
49、 pulley of a teeth of even number, measure on arbitrary two places or more as given in Fig. 3 by the micrometer specified in JIS B 7502 or the measuring device equivalent thereto, as appropriate. Further, in the case of a teeth of odd number also, measure do in the same manner, for example, as given in Fig. 4, and add the height h of the tooth of the cutter. 6.8 Cylindricity of tip cylinder As to the cylindricity of the tip cylinder of a pu