ER COLLET EXTENSIONS &
Craftsman Industries, Inc. offers a variety of cost-effective products designed for machining with ER collets. Select from the following ER products:
Straight Shank Collet Chuck Extensions up to 16" in length
Straight Shank "STUBBY" Collet Chucks with shorter shank lengths
Replacement lock nuts for all Craftsman Industries collet chucks
ER Collets (ER11, ER16, ER20, ER25, ER32)
Open-end hex. wrenches for tightening lock nuts (no special wrench needed)
Contact your regular tooling supplier for pricing and ordering information or click on our distributor locator form to locate a distributor in your area or distributors selling online.
Scroll through our photo gallery of ER Collet Chucks
All back-up screws have 1/8" hex. sockets. Solid shank items have no thru-hole or backup screw.
*Extra-Long chucks (8"+) are limited supply, please verify availability before ordering. Other lengths/sizes may be available (up to 20" length). Call/email for details.
DO NOT OVER-TIGHTEN LOCK NUT, ALWAYS USE BACKUP SCREW
Manufactured in USA from high grade, heat-treated alloy steel
Black Oxide finish for corrosion prevention
Wrench flats milled onto shank surface
Tighten lock nut with a standard open-end wrench (no special wrench needed, unlike other brands)
SWISS-STYLE DOUBLE-END ER CHUCKS
ER11 - ER16 - ER20
ER lock nuts interchangeable with ER "mini" lock nuts of other manufacturers. Lock nut tightened with any standard open end wrench (no cup wrench needed). Open end wrenches also available for purchase.
Open-End Check Nut Hex. Wrenches in Stock
(Part Numbers above)