Collet Chuck, ER-40, 4″ Diameter

This collet chuck for ER-40 collets mounts on the lathe spindle in place of the lathe chuck or can be used as a fixture on a milling table.
ER-40 collet chucks range in size from 1/8″ up to 1″ so you can run 1″ stock through the headstock of your lathe. (The through hole on the lathe spindle may be smaller.)
The outside diameter of the collet chuck is 100 mm. It has a 72 mm registration diameter and mounts with three M8 bolts on a 84 mm bolt circle.
*Collet must be assembled into a collet chuck nut before inserting into the collet chuck.