This standard specifies the technical requirements, inspection rules, marking and packaging of connecting rod nuts for internal combustion engines. JB/T 8417-1996 Technical requirements for connecting rod nuts for internal combustion engines JB/T8417-1996 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 8417-96
Internal Combustion Engine Connecting Rod Nuts
1996-09-03 Issued
Technical Conditions
19970701 Implementation
Ministry of Machinery Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Internal Combustion Engine Connecting Rod Nuts
Technical Specifications
1 Main Content and Scope of Application
This standard defines the technical requirements, inspection and inspection requirements, and packaging of engine connecting rod nuts. JB/18417-96
The main standard is applicable to the connecting rod nuts (hereinafter referred to as nuts) of piston internal combustion engines with a minimum diameter of 200m: 2 Referenced Standards
Acceptance inspection, marking and packaging of fasteners
General tolerance and fit (preferably 1~355mm in diameter) G9/TC3! Surface roughness frequency parameters change its numerical letter GB1184
Shape and position tolerance "Meter tolerance provisions GKS0S8.4 Marriage press dream fast fine tooth dyeing science
H51C3.-155 years general agreement) Fastener tolerance screw selection, screw and nut 3 technical requirements
3.1 The custom shall meet the requirements of the standard and shall be designed according to the product drawings and technical documents approved by the prescribed procedures. 3.2 The materials shall be in accordance with the provisions of GB339.13,
3.3 The mechanical properties of the noise shall be in accordance with the heat treatment sequence of 3098.4, and the performance grade shall be 10 or equivalent. 3.4 After heat treatment, the hardness difference of the nut is: less than or equal to one unit of hardness; less than one unit of hardness.
3.5 The blasting pattern of the screw field shall adopt the electric fine tooth belt blasting effect, and its blasting tolerance shall be in accordance with the specified level 6: 3.6 The position tolerance of each diameter shall be in accordance with the following specifications: the width of the nut body to the smaller diameter of the screw shall be selected as IT12 level; a.
The symmetry of the axis of the nut to the axis of the screw shall be selected as level 2 according to the nominal size of the blasting pattern; b.
The nut shall face the larger axis of the screw and directly follow the 11th level of Appendix 3 of B1184. 3. The thickness of the surface of each part of the nut shall be R according to the standard of GB/1031. 3.3urm
h. Climbing effect surface R.5.2ur1. www.bzxz.net
3.8 The surface of the screw is not allowed to have burrs, cracks, marks, etc. 3.9 The screw thread should be emulsified or rust-proof. 3.10 The technical requirements of the frequency support should be in accordance with GB3103.1. 4 Inspection rules
4.1 The screw thread can only be shipped after the manufacturer's inspection and control. 4.2 When the product is released in bulk, the R3 standard is determined. Approved by the Ministry of Machinery Industry on September 3, 1996
1997-07-01
The product label and packaging
marking and production equipment are in accordance with the standard.
Additional instructions:
JB/T 941796
This standard was proposed and submitted by the National Commission for the International Standardization of Gas Turbines on June 1, 2009. This standard has been assigned by the Ministry of Industry and Commerce for research and development. This standard is drafted; it will replace the original technical parts of the internal machine before the implementation of this standard.
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