Holds 1/4" shank sized tooling securely in the Automatic Tool Changer Drill Mill Chuck.
The Roland MDX-540A milling system does not include collets, these require a separate purchase.
The MDX-540 ATC has 4 tool positions, so we recommend that you buy 4 collets based on the tool sizes you want to load into the machine.
You will need a 1/4" collet if you purchased the ZCL-540 Rotary Axis Unit.
The calibration pin you use to setup the ZCL-540 requires a 1/4" collet.
If you are a new user of the MDX-540 we recommend you purchase (3) 1/8" collets and (1) 1/4" collet.