JB/T 50189-1999
Twist drills Service life test method (only for internal use) (English Version)
- Standard No.
- JB/T 50189-1999
- Language
- Chinese, Available in English version
- Release Date
- 1999
- Published By
- Professional Standard - Machinery
- Status
- 2013-09
- Replace By
- JB/T 11453-2013
- Latest
- JB/T 11453-2013
- Scope
- JB/T 50189-1999 This standard is a revision of JB/Z 256-85 "Twist Drill Life Test Method". During the revision, only editorial changes were made in accordance with relevant regulations, and the main technical content has not changed. This standard specifies the recommended procedures for life comparison testing and quality acceptance of standard straight and tapered high-speed steel twist drills. It is suitable for laboratory and production practice. In order to ensure the consistency and comparability of test results, this standard makes unified provisions on the twist drill, test blank, cutting fluid and other factors to ensure the consistency of test conditions, as well as test data and processing methods.
JB/T 50189-1999 history
- 2013 JB/T 11453-2013 Life testing methods in twist drills
- 1999 JB/T 50189-1999 Twist drills Service life test method (only for internal use)
JB/T 50189-1999 Twist drills Service life test method (only for internal use) was changed to JB/T 11453-2013 Life testing methods in twist drills.
