GB/T 290-2017 in English
VALIDRolling bearings-Needle roller bearings with drawn cup and without inner ring-Boundary dimensions
- Issued on:2017-11-01
- Implemented on:2018-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$136.00
《GB/T 290-2017滚动轴承 无内圈冲压外圈滚针轴承 外形尺寸》由TC98（全国滚动轴承标准化技术委员会）归口，TC98SC2（全国滚动轴承标准化技术委员会滚针轴承分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
GB/T 290-2017 specifies the serialized dimensions of drawn cup needle roller bearings without inner rings, which are applicable to the inner diameter range of bearing sets from 3mm to 68mm. Compared with the 1998 version, the 71D/22D/32D series and seal structure types are newly added.
Key technical changes
| Improvement dimensions | GB/T 290-1998 | GB/T 290-2017 |
|---|---|---|
| Structural types | 2 basic types | 4 new types including sealed type and full complement needle roller type |
| Dimensional parameters | C₂ dimension not specified | New flat bottom end thickness C₂ parameter |
| Series coverage | 1D series mainly | 2D/3D series expanded |
| Technical symbols | Use old symbols | Synchronize with the latest symbol system of GB/T 7811 |
Typical structural parameters
Take HK1416-2RS type bearing as an example:
- Inner diameter of needle roller set Fw=14mm
- Outer diameter of outer ring D=20mm
- Outer ring width C=16mm
- End thickness C₂≤1.3mm
The sealing structure can effectively prevent grease leakage and is suitable for working conditions such as automobile gearboxes.
Implementation suggestions
- Pay special attention to the C₁/C₂ size limit when selecting to avoid interference with the shaft end
- Full complement needle roller type (FY series) is suitable for high load occasions
- Oil hole diameter is selected according to Table 9 to ensure lubrication effect
- Conversion between old and new models requires checking specific size parameters
Standard evolution process
This standard has been revised five times from 1964→1982→1989→1998→2017, reflecting the development path of my country's stamping bearing technology from imitation to independent innovation.
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