This standard specifies the type, tooth size, pitch line length, belt width, limit deviation and marking of circular arc tooth synchronous belt transmission. This standard is applicable to the belts of circular arc tooth synchronous belt transmission for general industrial use. JB/T 7512.1-1994 Circular Arc Tooth Synchronous Belt Transmission Belt JB/T7512.1-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Circular arc tooth synchronous belt transmission
1 Subject content and scope of application
JB/T 7512. 7---94
This standard specifies the belt model, belt tooth size, pitch line length, belt width and its limit deviation and marking in circular arc tooth synchronous belt transmission. This standard applies to the belts in circular arc tooth synchronous belt transmission for general industrial use. 2 Belt type and belt tooth size
The belt models are 3M, 5M.8M, 14M and 20M. The shape and size of the belt teeth are shown in Figure 1 and Table 1. Figure 1 Circular arc tooth step belt tooth shape
Table 1 Circular arc tooth synchronous belt belt tooth size
Pitch P
Tooth height h
Tooth top fillet radius r.
Tooth root fillet radius
Tooth root thickness.
Tooth angle 28
Belt height.
0. 24 ~~ 0. 30
3.1See Table 2 for belt width dimensions.
0. 40~~0. 44
Approved by the Ministry of Machinery Industry of the People's Republic of China on October 25, 1994442
0. 64~0. 76
1.20~~1.35
1. 77~~2. 01
Implemented on October 1, 1995
Band width code
See Table 3 for bandwidth limit deviation.
>6～~10
>10～35
>35～50
>50~65
65～75
>75～100
>100~180
>180～290
>290~340
4 Nodal line length and its limit deviation
JB/T7512.1—94
Table 2 Bandwidth size
Standard bandwidth
Table 3 Bandwidth limit deviation
Nodal line length L
4.1 See Table 4, Table 5, Table 6, Table 7 and Table 8 for the standard nodal line length of the belt. 4.2 See Table 9 for the limit deviation of the nodal line length of the belt. ≥800～1 650
>1 650
Length code
Length code
Pitch line length Lp
Pitch line length Lp
JB/T 7512.1--94
Table 43M Arc tooth synchronous belt length series
Length code
55M Circular arc tooth synchronous belt length series
Length code
Pitch line length LP
Pitch line length Lp
Length code
Length code
Pitch line length Lp
Pitch line length Lp
|JB/T7512.1—94
Continued Table 5
Length code
8M circular tooth synchronous belt length series
Length code
Pitch line length Lp
Pitch line length Lp
Length code
Length code
Pitch line length range
>254～381
>381~ 508
>508~762
7762~1 016
>1 016~1 270
>1 270~1 524
>1 524~1 778
Pitch line length Lr
Pitch line length Lp
Center distance limit deviation
JB/T 7512.1—94
14M circular solitary tooth synchronous belt length series
Length code
20M circular arc tooth synchronous belt length series
Length code
Pitch line length limit deviation
Pitch line length limit deviation
Pitch line length range
>1 7782 032
>2 032~2 286
>2 286-2 540
>2 540-2 794
>2 794~3 048
>3 048~3 320
3 320~3 556
>3 556~3 810
Pitch line length Lp
Pitch line length Lp
Center distance limit deviation
Pitch line length limit deviation
±1, 06
Pitch line length range
≥3 810~4 064
4 0644 318
4 318-4 572
4 572-4 826
>4 826~5 008
>5 008~5 334
5 mark
Center distance limit deviation
JB/T7512.1—94
Continued table 9bzxZ.net
Pitch line length limit deviation
Pitch line length range
75 334~5 588
75 588~5 842
75 842-6 096
>6 096~6 350
76 350-~6 604
>6 604~6 858
Center distance limit deviation
Pitch line length limit deviation
±1, 64
μThe marking of arc tooth synchronous belt consists of length code, belt type, bandwidth code and standard number. The length code and belt type are connected by "". 5.1
5.2 Marking example
Arc tooth synchronous belt with pitch line length of 1120mm, belt type of 8M and bandwidth of 30mm: 1120-8M30JB/T7512.1—94
Additional instructions:
This standard is proposed by the Ministry of Machinery Industry.
This standard is under the jurisdiction of the Machinery Standardization Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Machinery Standardization Research Institute of the Ministry of Machinery Industry, Yangzhong Special Adhesive Belt Factory, Shanghai University of Engineering Science, Harbin Institute of Technology, and Wuxi County Taihu Synchronous Belt Wheel Factory.
The main drafters of this standard are Qin Shuan, Cao Zhujia, Han Yongchun, Zhou Jilong and Feng Ruying. 447
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