JB/T 10238—2001 This standard specifies the code method, dimensions and technical conditions for double-row angular contact ball hub bearings and double-row tapered roller hub bearings for automobiles. This standard applies to the production, inspection and user acceptance of hub bearings for cars and light vehicles. This standard was first issued in May 2001. JB/T 10238-2001 Automobile Hub Bearing Unit JB/T10238-2001 Standard download decompression password: www.bzxz.net

ICS 21.100.20
Machinery Industry Standard of the People's Republic of China
JB/T18239—2001
Rolling bearings
Deep groove ball bearing curled dust coverwww.bzxz.net
Technical conditions
Rolling bearings-Specifications of curled shieldfor deep groovec hall bearlngs2001-05-23 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB 10239—2001
This standard is formulated by the People's Republic of China. This standard is proposed and approved by the National Technical Committee for Standardization of Rolling Bearings. Drafting unit of this standard: Cage Branch of China Bearing Industry Association Technical Committee The main drafters of this standard: Xiao Zhenyu, Yang Jinzhou, Wen Chuang. 1 Scope
Machinery Industry Standard of the People's Republic of China
Rolling bearings
Deep groove ball bearings Rolled dust cover
Technical conditions
Ralling buaringsSpecialties of carled shleldTor drep groove ball bearingsJB/T10239—2001
This standard specifies the technical requirements, measurement methods, inspection rules, and markings of deep groove ball bearing rolled dust cover (hereinafter referred to as rolled dust cover). Packaging and storage,
This standard is used for production inspection and acceptance by manufacturers. 2 Reference standards
The texts contained in the following standards are used in this standard and constitute the provisions of this standard. When this standard is published, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 70B1988 | 1997
JR/T 8921—1999
Size, shape, measurement and tolerance of cold-rolled plate and steel
Stainless steel cold-rolled steel strip
Rolling bearing packaging
High-quality carbon steel cold-rolled steel plate and steel strip for rolling bearing oil seal anti-rust
Dynamic bearing product logo
Dynamic bearing skin and other commodity parts inspection regulations
3 Symbols and abbreviations (see 1)
d: Nominal inner diameter of dust cover
|Dp: Nominal outer diameter of dust cover
: Nominal inner diameter of dust cover after winding
R: Nominal radius of inner fillet near dust cover winding
: Nominal width of dust cover
: Distance between upper and lower planes of dust cover: Difference between inner and outer radius of dust cover
Vny: External diameter changes and Vr=DrmixDrninVa: Internal diameter changes and Va.=drnx-drainApproved by China Machinery Industry Federation on 201-05-23, 2001-10-01 Implementation
18/T10239—2001
Ve: Change of inner diameter of curling Vew-Dnnu-DyVi: Change of difference between inner and outer radius W..=Her.He.Va, : B, Vs.=Brirm-rimm Figure
4 Technical requirements
4.1 Materials
4.1.1 Dust-proof benefits are made of 08A] minus 10 high-quality carbon cable structural steel cold-rolled thin plates and steel strips, and the technical requirements should comply with the provisions of GR 13237. The surface quality is lower than the light high-grade material surface II group: drawing damage is ordinary drawing grade P. The shape, size and tolerance of steel plates and strips shall conform to the provisions of GBT708. 4.1.2 Stainless steel stamped dust covers can be made of 0Cr18N9, 1Cr18Yi9, 1Cr13, 2Cr13 cold-rolled stainless steel strips or cold-rolled stainless steel plates. Their technical requirements shall conform to the provisions of GB/T3220 or GR/T4239. 4.2 Tolerances 4. 2.1 VVa and V of dust covers shall conform to the provisions of Table 1. Table 1 Note: According to the requirements of the product drawings, the dust covers shall conform to the provisions of Table 2. 4.2.3 V of dust covers shall conform to the provisions of Table 3.
Surface treatment and appearance quality
JB/T10239—2001
The finished dust cover should be treated with zinc, rust or oxidation to prevent rust. The dust cover is not allowed to have cracks, rust, scratches, hair bundles, flaking and falling defects.
4.4 Others
The opening of the dust cover is evenly divided into the groove hook, and the curling radius R shall comply with the requirements of the product drawing. 5 Measurement method
5.1 The outer diameter deviation and inner diameter shrinkage difference of the dust cover, V, Vm and Vm are measured with a vernier caliper with a spread of 0.02mm. The measurement shall not be stepped down at the next point along the diameter.
5.2 The dust cover, with a height measuring instrument, is measured (see Figure 2). The measurement of the parts along the wet circumference direction shall not be less than three places. 5.3 Curling radius R. Check with R gauge
6 Inspection rules
6.【The appearance of the dust cover should be inspected by 10U% of the pressure. 6.2 The inspection and observation of the dust cover shall be in accordance with the provisions of JBIT.8921. The main items include D, dl, Vnm, Ps,, VHc, Vg. The other provisions of the product drawing are modified items. The sample size is selected from the special inspection level $-2, and the acceptable quality level-AQL value is 2.5 for the half item and 6.5 for the secondary item. If the subscriber has other requirements, it can be negotiated with the manufacturer. 7 Marking
The dust cover mark shall comply with the provisions of JB3574 or meet the requirements of the product drawing. Inner packaging and storage
month.1 The dust cover that has passed the final inspection shall be rust-proofed and inner-packed according to the provisions of JB73034, and then packed in GB/T8597. The code of the bearing used, the number of the dust cover, the packaging date and the manufacturer's name shall be marked on the packaging box. 8.1 The dust cover shall not be rusted or deformed during the aging and storage period of 1 year.
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