GB/T 6139-1997 in English
SUPERSEDEDSubland twist drills-Technical specifications
- Issued on:1997-08-28
- Implemented on:1998-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
| Standard No: | GB/T 6139-1997 |
| Document status: | SUPERSEDED |
| Superseded by: |
GB/T 6139-2007 Subland twist drills—Technical specifications
|
| Superseded on: | 2007-12-01 |
| Title in English: | Subland twist drills-Technical specifications |
| Title in Chinese: | 阶梯麻花钻 技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 1997-08-28 |
| Implemented on: | 1998-06-01 |
| ICS Classification: | 25.100.30-Drills, countersinks, reamers |
| Chinese Classification: | J41-Cutting tools |
| Professional Classification: | GB-National Standard |
| Related Keywords: | stepped twist drills
twist drills subland twist drills-technical specifications scopethis standard twist |
| Related Topics: | twist drill
ladder order GBT6139 GB/T 6139-1985 GB/T 6139-1997 GB/T 6139-2007 edge ladder technology |
《GB/T 6139-1997阶梯麻花钻 技术条件》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。
本标准规定了阶梯麻花钻的尺寸、材料和硬度、外观和表面粗糙度、性能试验及标志和包装的技术条件。本标准适用于按GB/T 6138.1和GB/T 6138.2生产的攻丝前钻孔用阶梯麻花钻及其他阶梯麻花钻。
Scope
This standard specifies the technical conditions for the size, material and hardness, appearance and surface roughness, performance test, marking and packaging of stepped twist drills. This standard is applicable to stepped twist drills for drilling holes before tapping and other stepped twist drills produced according to GB/T6138.1 and GB/T6138.2.
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