GB/T 4257-2004
Core drills-Technical requirements
- Standard No.
- GB/T 4257-2004
- Language
- Chinese
- Release Date
- 2004
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
- Lastest
- GB/T 4257-2004
- Scope
- This standard specifies the basic requirements for position tolerance, material and hardness, appearance and surface roughness, marking and packaging of straight shank reamers, Morse taper shank reamers and sleeve reamers. This standard applies to reaming drills produced according to GB/T 4256 and GB/T 1142.
GB/T 4257-2004 history
- 2004 GB/T 4257-2004 Core drills-Technical requirements
- 1984 GB/T 4257-1984 Core drills--Technical requirements