Various collet sizes are available for the M321/M328, from 3mm, 1/8″, 4mm to a maximum of 6mm shank diameter, both for the manual and automatic collet versions. Click here for additional specifications.
For normal machining applications, the mimimum recommended speed for the M321 and M328 Light Industrial Series spindles are 10,000 rpm, although for soft materials such as perspex, lower speeds may be possible. Click here for more information on the Light Industrial Series spindles.
Both the M321 and the M328 need to be watercooled and connected to an external chiller, due to the high speed of operation and the powerful integrated motor. The D1091 is an air cooled spindle, and does not require water cooling. Click for more information on the Light Industrial Series spindles.