ER25 Collets

ER25 collets in 18 metric sizes from 1.5 to 17 mm and 19 inch sizes from 3/32" to 3/4", plus two ER25 collet sets (16-piece inch, 15-piece metric). An ER25 collet is 34 mm (1.34") long with a 26 mm (1.02") outside diameter.

Metric collets are named by the shank range they hold, for example ER25 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.

ER25 collets fit the ER25 holders on BT Collet Chucks (BT30, BT40), HSK Collet Chucks (HSK32E, HSK40E), ISO Collet Chucks (ISO25) and Straight Shank Collet Chucks & Extensions. ER25 slotted, mini (also left-hand) and dust seal nuts are on Collet Nuts, and ER25 internal dust seals on Dust Seals & Covers. All ER sizes and collet sets: Collets.