ER8 Collets

ER8 collets in 9 metric sizes from 0.5 to 5 mm and 3 inch sizes (1/16", 1/8" and 3/16"), plus the 9-piece ER8 metric collet set. An ER8 collet is 13 mm (.51") long with an 8.5 mm (.33") outside diameter.

Metric collets are named by the shank range they hold, for example ER8 2.5-3mm, and inch collets by the shank size. Our ER collets are made from high-carbon bearing steel, ground and heat treated, and hand inspected, with runout (T.I.R.) averaging 0.0002". Use them with a PowerCOAT nut for the best holding power and cutting tool life.

ER8 collets fit the 3/8" shank ER8 extension on Straight Shank Collet Chucks & Extensions. The ER8 high-speed mini nut is on Collet Nuts. All ER sizes and collet sets: Collets.