JIS-B-1856-1993-ENG.pdf
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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
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