The Standards of the CNC Tool Holders
The CNC tool holders follow rules and standards, which have been defined by the AMT: Association for Manufacturing Technology. AMT is an organization that among other activities includes the standardization of tool holders used in manual machines and CNC work centers.
The three main standards for the CNC tool holders used in marble, glass, wood and mechanical sectors are:
- ISO DIN 69871 which identifies ISO tool holders (ISO 30, ISO 40 and ISO 50)
- JIS (Mas 403) which identifies the BT tool holders (BT 30, BT 40, BT 50)
- ISO DIN 69893 which identifies HSK tool holders (HSK-A, HSK-B, HSK-E, HSK-F)
The parts of a CNC Tool Holder
A CNC tool holder generally consists of:
- Pull Stud (only in ISO and BT)
- Conical body
- Tool fitting
You can see in the following drawing the ISO / BT tool holder and the HSK tool holder with these various parts.