JB/T 6766-1993 Rubber and plastic parts for lead-acid batteries

This standard specifies the dimensional tolerances of rubber and plastic parts for lead-acid batteries. JB/T 6766-1993 Rubber and plastic parts for lead-acid batteries JB/T6766-1993 Standard download and decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
Dimensional Tolerance Subject Content and Scope of Application of Rubber and Plastic Parts for Lead-acid Batteries
JB/T 6766—1993
This standard specifies the dimensional tolerances for lead-acid batteries Dimensional tolerances of rubber and plastic parts (hereinafter referred to as dimensional tolerances). This standard applies to tolerances for injection molded plastic parts and compression molded rubber parts. Code, grade, numerical value and labeling of dimensional tolerances 2
The tolerance grade of dimension tolerances is divided into 7 levels (levels 1 to 7). See Table 1 for values ??at each level. The upper and lower deviations of the basic dimensions can be allocated according to the design requirements
For example: the basic size is 13, the tolerance level is level 4, the tolerance value is 0.50, the upper and lower deviations can be allocated as 13±0:, 13±0.25, 13-8.5, 13+9.”, etc.
Table 1
Tolerance, limit deviation level
Dimensional section
10~~14
30--40||tt ||40~50
65~~80
80~100
100~120
120~140
140 ~160
160~180
180~200
200225
0.16|| tt||0.18
0.34||tt| |0.36
0.48|| tt||0.52
Ministry of Machinery Industry 1993- 08-21Approved
0.44||tt| |0.48
Tolerance value
0.44| |tt||0.50
0.96||tt ||1.03
1.13| |tt||1.21
1. 98| |tt||2.03
1.23||tt ||1.36
1.58| |tt||1.75
3.22||tt ||3..39
±1.42| |tt||±1.53
±2.36|| tt||±2.49
Limit deviation
±0.98||tt| |±1.12
±1.40||tt ||±1.57
±2.71||tt| |±2.92
1993-10-01 Implementation
Size segment
225~250
250~280
280~315
315~355
355~400
400-150
450~500
500~~560
560~630
630-710
710 ~800
800～900
900～1000
1000~～1250
0.81| |tt||0.86
0.95||tt ||0.99
1.89| |tt||2.04
JB/T6766—1993
表1（完）
公差、公差凯店电影
公差所作|| tt||1.50
2.08||tt| |2.20
3.42|| tt||3.59
3.60||tt| |3.80
2.2未注公差化学的公差电影图像3级。，见表1中8～10级。
4.64||tt| |4.86
±3.18||tt ||±3.35
±5.08| tt| tt||±4.37
±5.91||tt ||±6.35
梦注时用公差电影号注明。
For example: 未注公差利用的公差电影的8级的公差电影的JB/T6766—1993。常用materials制件公差电影选用
常用materials制件公差电影可电影电影电影电影电影选用，见表2表2
常用materials名行
acrylonitrile-丁二质质共聚物||tt| |acrylonitrile-鳨质共聚物
聚自质（高了作）
聚自质（高源了）
聚閄质
聚呄至
聚氯质（自）
手机设计：
materials代号
LDLE.下载起草人吴申南。
公差电影
2～4 ，．
Use the tolerance grade number when marking.
For example: the tolerance level of dimensions without tolerances is level 8 in JB/T6766-1993. Selection of tolerance levels of commonly used materials
Tolerance levels of commonly used materials can be selected according to the production level of the enterprise, see Table 2 Table 2
Common material names
Acrylonitrile-butadiene Ethylene copolymer
Acrylonitrile-styrene copolymer
Polyethylene (high density)
Polyethylene (low density)
Polystyrene
Polypropylene
Polyvinyl chloride (soft)
Rubber
Additional instructions:
Material code
AS||tt| |HDPEwww.bzxz.net
This standard is proposed and managed by the Shenyang Battery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Shenyang Battery Research Institute. The main drafter of this standard is Wu Shennan.
Tolerance level
2～4,．
±6.07| |tt||±6.35
Use the tolerance grade number when marking.
For example: the tolerance level of dimensions without tolerances is level 8 in JB/T6766-1993. Selection of tolerance levels of commonly used materials
Tolerance levels of commonly used materials can be selected according to the production level of the enterprise, see Table 2 Table 2
Common material names
Acrylonitrile-butadiene Ethylene copolymer
Acrylonitrile-styrene copolymer
Polyethylene (high density)
Polyethylene (low density)
Polystyrene
Polypropylene
Polyvinyl chloride (soft)
Rubber
Additional instructions:
Material code
AS||tt| |HDPE
This standard is proposed and managed by the Shenyang Battery Research Institute of the Ministry of Machinery Industry. This standard is drafted by Shenyang Battery Research Institute. The main drafter of this standard is Wu Shennan.
Tolerance level
2～4,．
±6.07| |tt||±6.35
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