GB/T 4258-2004 in English
VALIDParallel shanks countersinks for angles 60°、90°and 120°inclusive
- Issued on:2004-08-01
- Implemented on:2004-08-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$49.00
| Standard No: | GB/T 4258-2004 |
| Document status: | VALID |
| Title in English: | Parallel shanks countersinks for angles 60°、90°and 120°inclusive |
| Title in Chinese: | 60°、90°、120° 直柄锥面锪钻 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2004-08-01 |
| Implemented on: | 2004-08-01 |
| Superseding: |
GB/T 4258-1984 Countersinks with parallel shanks for angles 60°90°and 120°inclusive
|
| ICS Classification: | 25.100.30-Drills, countersinks, reamers |
| Chinese Classification: | J41-Cutting tools |
| Professional Classification: | GB-National Standard |
| Related Keywords: | parallel shanks countersinks
shank countersink drills countersinks metric size scopethis standard |
| Related Topics: | sn/t 4258
qb/t 4258 GB t 4258 gb/t4258 GB 4258 gb/t4258-2004 GB/T 4258-2004 GB/T 4258- tapered surface s210-60 GBT4258 GB/T 4258-1984 GB/T 4258-2004 |
《GB/T 4258-200460°、90°、120°直柄锥面锪钻》由TC91（全国刀具标准化技术委员会）归口，主管部门为中国机械工业联合会。
本标准规定了60°、90°、120°直柄锥面锪钻的尺寸。本标准只规定米制定尺寸，对切削直径8mm至25mm的锪钻，以后也只推荐米制尺寸。这些尺寸只适用于高速钢刀具，但生产上允许，柄部可用适合的材料代替，如碳钢。
Scope
This standard specifies the dimensions of 60°, 90°, 120° straight shank countersink drills. This standard only specifies the metric size, and for countersinking with a cutting diameter of 8mm to 25mm, only the metric size is recommended in the future. These dimensions apply only to high-speed steel knives, but production permits, the shank can be replaced by a suitable material, such as carbon steel. Unless otherwise stated, countersinks are made right-cut. Morse taper shank countersink drills are given in GB/T 1143.
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