This standard refers to ISO 6525-1983 (E) "Sliding bearings - Full-circle thrust washers made of bimetallic strips - Dimensions and tolerances". This standard specifies the terminology, code and structural type, technical requirements, inspection rules and markings, packaging, transportation and storage of crankshaft thrust washers for internal combustion engines. This standard is applicable to crankshaft thrust washers for tractors, automobiles, construction machinery, ships and fixed reciprocating piston internal combustion engines with cylinder diameters within 200mm. Within the above range, thrust washers made of bimetallic materials (except for special designs) must comply with the provisions of this standard. JB/T 5084-1991 Technical conditions for crankshaft thrust washers for internal combustion engines JB/T5084-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB5084--91
Technical Conditions for Crankshaft Thrust Washers of Internal Combustion Engines
Published on July 1, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implementation on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Crankshaft Thrust Washers of Internal Combustion Engines
JB5084--91
This standard refers to ISO6525-1983 (E) Sliding bearings-Full circle thrust washers made of bimetallic strips-Dimensions and tolerances. Subject content and scope of application
This standard specifies the terminology, code and structural type, technical requirements, inspection rules and marking, packaging, transportation and storage of crankshaft thrust washers for internal combustion engines.
This standard is applicable to crankshaft thrust washers for tractors, automobiles, engineering machinery, ships and fixed reciprocating piston internal combustion engines with a cylinder diameter of less than 200mm (hereinafter referred to as thrust washers). Within the above range, thrust washers made of bimetallic materials (except for special design requirements) must comply with the provisions of this standard. 3
Cited standards
GB2828
GB8896www.bzxz.net
GB10451
GB10453
JB3657
ZBT12 003
Technical conditions for high-quality carbon structural steel
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) Aluminum-tin-20 copper-steel bimetallic plates
Sliding bearingsMetallic multilayer materials for thin-walled bearingsSliding bearingsHardness test method for multilayer bearingsReduction alloys for automobile engine bearingsMetallographic standards for tin-based and lead-based alloysMetallographic inspection standards for cast copper-lead alloy bearings for internal combustion enginesMetallographic test standards for copper-lead alloy bearings for automobile engine bearings
3 Terms, codes and structural types
3.1 Terms and codes
The terms and codes for thrust washers are shown in Table 1, Figure 1 and Figure 2. Table 1
Alloy layer purity
Thrust pad true diameter
Approved by the Ministry of Machinery and Electronics Industry on July 1, 1991
Implemented on July 1, 1992
Thrust pad seat depth
Location pin hole center position
Location pin diameter
Oil groove position
Oil groove bottom width
Oil groove bottom wall thickness
Oil groove angle
Oil groove radius
Distance between the grid and the outside Distance
Angle or angle
Alloy surface angle or angle
Flatness
3.2 Structural type
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Continued Table 1
Typical assembly and structural forms of thrust washers are shown in Figures 1 and 2. Figure 1
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4 Technical requirements
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4.1 Products should be manufactured according to product drawings and technical documents approved by the prescribed procedures. 4.2 Materials
4.2.1 Steel back
4.2.1.1 The steel back of the Babbitt alloy bimetal material of the casting process shall be made of 08, 10, 15, 20 steel specified in GB699. 4.2.1.2 For copper-based alloy bimetallic materials by casting and sintering processes, the steel back shall be made of 08, 10, 15 steel specified in GB699. 4.2.1.3 For aluminum-based alloy bimetallic materials by rolling processes, the steel back shall be made of 08A1, 08, 10 steel specified in GB699. 4.2.2 Alloy
, Babbitt alloy,
b Copper-based alloy:
e. Base alloy. The grades, chemical composition, metallographic structure and mechanical properties of the above alloys are shown in Appendix A (Supplement). 4.3 Dimensions and tolerances
4.3.1 Outer diameter D, inner diameter, wall thickness er, center position of locating pin hole c, diameter F of locating pin hole and tolerances The outer diameter D, inner diameter 4, wall thickness er, center position of locating pin hole c, diameter F of locating pin hole and tolerances of thrust washers shall be as specified in Table 2. Table 2 Dimension tolerances
Basic dimensions of bearing seats
Preferred
Non-preferred
Inner diameter.
Outer diameter D
Wall thickness.
Center position of locating pin hole

Location pin hole
True diameter
Basic dimensions of bearing seat
Preferred
Non-preferred
Inner diameter 4
4.3.2Thrust washer seat diameter D and tolerance
Outer diameter D
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Continued Table 2
Wall thickness r
Location pin hole
Center position measurement.
The basic dimension of the thrust washer seat diameter D is the same as the outer diameter D of the thrust washer drawing: its tolerance is G10. 4.3.3Thrust washer seat depth e and tolerance
The basic dimension and tolerance of the thrust washer seat depth shall be agreed upon by the supply and demand parties. 4.3.4Alloy layer thickness e
The alloy layer thickness of the thrust washer drawing shall be as specified in Table 3. Table 3
Alloy materials
Babbitt alloy
Steel-based alloy
Cap-based alloy
4.3.5 Alloy layer thickness tolerance
Taiwan alloy layer thickness
0.25~0.70
0.25~0.75
0.30~0.90
The difference between the maximum and minimum values ​​of the alloy layer thickness of the same thrust pad shall not be greater than that specified in Table 4. Table 4
Alloy materials
Babbitt alloy
Base alloy
Aluminum-based alloy
Alloy layer rhombus tolerance:
Locate pin holder
Diameter F
4.3.6 Oil lift
4. 3. 6. 1
JB5084-91
The dimensions and tolerances of the oil groove bottom width (w) shall be as specified in Table 5. Table 5
Groove bottom width
Basic dimensions
4.3.B.2 The limit deviation of the wall thickness G of the oil groove is (一.s) mm. If the surface is formed by oil pressing, its depth should be slightly less than the thickness of the alloy layer e. 4.3.6.3 The chamfer angle α of the oil groove is recommended to be 45°4.3.6.4 The tolerance of the oil groove position G, shall be as specified in Table 6. Table 6
4.3.6.5 Oil groove The distance between the top and the outer circle GL ≥ 1mm, 4.3.6.6 Oil plate radius 7mm.t250mm,
4.3.7 Chamfer or corner radius
Limit deviation
Limit deviation of oil position G,
4.3.7.1 The chamfer between the steel and the outer surface should be, × 45*, or the corner with a radius of,. , determined according to the following range, that is; 0.3mm≤r, ≤0.6mm
The radius of the alloy surface corner or corner is determined according to the following formula, that is: rsm. 0. 1(D -= ±)/2
4.3.8 Flatness limit value
The limit value of flatness of thrust pad without oil injection is as specified in Table 7, and the limit value of flatness of thrust pad with oil injection is agreed upon by the supplier and the buyer.
4.3.9 Unspecified tolerance
For lengths and angles without specified tolerance, the limit deviation is as follows: length ±0.25mml
angle ±5°| |tt||4.4 Surface roughness
4.4.1 The roughness R. value of the steel back surface should not be greater than 2.5um, 4.4.2 The roughness R. value of the alloy surface should not be greater than 1.25μm. 6
Flatness>Limit value
JB5084—91
4.5 The alloy layer and the steel back should be firmly combined, and no peeling phenomenon is allowed. 4.6 The steel back surface shall not have burrs, Rust, cracks and other defects. 4.7 The alloy layer shall not have defects such as foreign debris, pores, shrinkage, etc. 4.8 The alloy surface is not allowed to have scratches, bumps and crushing 4.9 The warranty period of the thrust washer is 2000h. During the warranty period, if the thrust washer is damaged due to poor manufacturing quality, the manufacturer shall replace it for the user free of charge.
5 Inspection rules
5.1 Inspection category
Regular inspection:
b warehouse inspection;
Delivery acceptance.
5.2 Inspection items
Dimensions:
Geometric accuracy:
Surface phase accuracy:
Physical and chemical properties;
Appearance quality:
Marking, packaging.
5.3 Sampling method
According to the sampling inspection rules formulated in GB2828. 5.4 Test methods
5.4.1 Hardness test
The hardness test method of steel back and edible gold shall be in accordance with the provisions of GB10453. 5.4.2 The fit test between the alloy layer and the steel back is mainly based on the sound. When the steel back of the thrust washer is tapped lightly, the sound should be clear and loud, and there should be no gurgling sound. Instruments or destructive tests can also be used. The method of destructive test is as follows:
Bend the thrust washer 90 degrees toward the steel back, and cracks in the alloy layer are allowed, but alloy falling or separation of the alloy layer from the steel back is not allowed. 5.4.3 Flatness test
The thrust washer without oil must fall between two vertical parallel plates with a distance of er10. It falls by its own recoil. The thrust washer with oil shall be agreed upon by the supplier and the supplier.
6 Marking, packaging, transportation and storage
6.1 Marking
6.1.1 The packaging box must have a label indicating the manufacturer's name or factory mark and product model. 6.1.2
The outer surface of the packaging basin should be marked with:
Manufacturer name, factory logo and address:
Product name and model,
Quantity:
Packing date:
The outer surface of the packaging box should be marked with:
Manufacturer name and address;
Product name and model:
Total weight and quantity:
Receiving unit and address:
e, "Handle with care", "Pressure protection", "Pressure protection" 1. Factory date:
JB5084—91
6.2 Packaging
6.2.1 Each thrust pad should be clean and anti-corrosion treated before packaging, and then put into the packaging box after packaging. 6.2.2 Each packaging box should be accompanied by a product certificate signed by the inspector of the quality inspection department of the manufacturer. 6.3 Transportation
The packaging box must be placed in a dry packaging box. The total weight of each packaging box should not exceed 50kg, and it must be guaranteed that it will not be damaged during normal transportation.
6.4 Storage
The packed thrust washer should be stored in a ventilated and dry warehouse. Under normal storage conditions, the manufacturer should ensure that the thrust washer will not rust within 12 months from the date of leaving the factory.
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