ER40 Collets

ER40 collets in 23 metric sizes from 3 to 26 mm and 25 inch sizes from 1/8" to 7/8", plus two ER40 collet sets (13-piece inch, 23-piece metric). An ER40 collet is 46 mm (1.81") long with a 41 mm (1.61") outside diameter.

Metric collets are named by the shank range they hold, for example ER40 5-6mm, 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.

ER40 collets fit the ER40 holders on BT Collet Chucks (BT30, BT40), HSK Collet Chucks (HSK63F, HSK63E), ISO Collet Chucks (ISO30, ISO40) and Straight Shank Collet Chucks & Extensions. ER40 slotted, dust seal and AirPRO nuts are on Collet Nuts, and ER40 internal dust seals on Dust Seals & Covers. All ER sizes and collet sets: Collets.