JB/T 9770-1999 This standard is a revision of ZB J94 004-88 "Technical Conditions for Oil Pump Gears of Internal Combustion Engines". During the revision, only editorial modifications were made in accordance with relevant regulations, and the main technical content remained unchanged. This standard specifies the technical requirements, inspection rules and markings, packaging, transportation, storage, etc. for oil pump gears of internal combustion engines. This standard applies to the main and passive gears of external meshing involute gear pumps made of steel and ductile iron for small and medium power internal combustion engines. This standard was first issued in 1975 and revised for the first time in 1988. JB/T 9770-1999 Technical Conditions for Oil Pump Gears of Internal Combustion Engines JB/T9770-1999 Standard download decompression password: www.bzxz.net

JCS27.020
Machinery Industry Standard of the People's Republic of China
JB/T9770-1999
Internal combustion engine oil pump gears
Technical conditions
Inner combustion engine oil pump gears-Gears for lubricating oil pumps-Specifications
1999-09-17 Issued
State Machinery Industry Bureau
Implementation on 2008-01-01
JE/T5770-1
Small standard reflects the revision of ZBJ940D4-B8.Technical specifications for internal combustion engine oil pump gears. The original standard has been revised and edited: the main technical content has not changed. This standard replaces 2BJ94004-88 from the date of implementation: This standard was issued by the Technical Committee for Standardization of Metallic Internal Combustion Engines and is under the jurisdiction of the Standardization Technical Committee of Metallic Internal Combustion Engines. The drafting unit of this standard is Shanghai Internal Combustion Engine Research Institute. The main drafter of this standard is Fu Zeming.
This standard was first issued in 1975 and first approved in 1989. The Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Oil Pump Gears for Internal Combustion Engines
Local CPMbustlon Engines-Gears for Lubrlcating Ail PumpeSpecifications
JB/T9770-1999
Find 28 J94 004-B8
This standard adds technical requirements for oil pump gears for internal combustion engines, inspection rules and markings, packaging: transportation and storage. This standard is applicable to the main and passive gears of the external disconnect line gear system made of steel and ferrite for small and medium-sized internal combustion engines (hereinafter referred to as oil pump gears).
2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the vehicle standard is published, the versions shown are valid. All standards will be revised. All parties using the vehicle standard should explore the possibility of using the latest version of the following standards. GB/T2838--1987 Sampling sequence and sampling table for batch inspection (applicable to the next consecutive batch of inspection) GB/T1009 5-1988 Disconnection bearing gear precision 3 Technical requirements
3.1 The gear should meet the standard and be manufactured according to the product drawings and technical documents approved by the standard procedure. 3.2 Gear material and hardness
Medium carbon steel: 26IIRC:
Ball: 30-300HBC.
3.3 The surface roughness of the gear should not be less than the following requirements: a) The surface size of both ends is 0.8μm:
b) The R of the tooth circle surface, tooth profile surface, and gear shaft (or inner hole) surface is 1.6um. 3.4 The required manufacturing accuracy of the gear should not be less than 5GK and should comply with the provisions of GB/10095. 3.5 The size tolerance of the gear hole is [T7; the size tolerance of the shaft is IT6. It should comply with the provisions of Table 1 of GB/T10095-1988. 3.6 The radial runout of the cylindrical surface of the pump gear facing the gear matching hole (or shaft) shall comply with the provisions of GB/T10095-1988 Table 10.
3. The end runout of the pump gear facing the gear matching hole [or shaft] surface shall comply with the provisions of GB/T10095-1988 Table 11.
3. The axis line tolerance of the gear pair shall comply with the provisions of GB/T10095-1988 Table 10. 3.9 The gear pair center distance limit deviation +6 shall comply with the provisions of GB/T10095-1988 Table 11. 3.E0 The tooth profile surface shall not have any defects such as magnetic scratches and scratches. Guohao Engine Industry Co., Ltd. Issued on 1999-09-17 Approved on 2000-01-01 Implementation
JB/T9770-[999
3.11 Oil pump gears are under warranty for 2000 hours under normal use within 24 months from the date of leaving the factory. If the gears are damaged due to manufacturing quality problems during the warranty period, the manufacturer shall be responsible for warranty, replacement and refund. 4 Inspection rules
4.1 Each gear shall be inspected by the inspection department of the manufacturer. Only after the inspection is qualified and the product certificate is issued can it leave the factory. 4.2 The manufacturing quality of the oil pump gear shall be inspected according to the items listed in Table 1. Table 1
Quality inspection itemsbZxz.net
4. When the ordering unit randomly inspects the oil pump gear products, it shall be carried out in accordance with the provisions of BT2828. The AQL value of the qualified quality level shall be agreed upon by both parties. 5. Marking, packaging, transportation, storage 5.1 The gears of the oil pump must be cleaned and oil-sealed, sealed, and rust-proofed before packaging. 5.2 The packed gears of the oil pump must be packed in cartons or wooden boxes and ensure that they will not be damaged during transportation. The total weight of the gears shall not exceed 50kg. Simple packaging may also be used if the shipping unit agrees. 5.3 Each tray shall be accompanied by a product quality certificate and a certificate signed by the inspector. The following shall be noted on the certificate: a) Manufacturer name, factory name and address: b) Product name or delivery number: c) Inspection date.
5.4 The outside of the packaging box should be marked with:
a) Manufacturer's name and address:
5) Product name or model:
Expiration date, quantity and total quantity
d) Packing box size (length × width × width, mm): Name and address of the receiving unit:
"Moisture-proof" mark,
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