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ER Tool Extenders

ER Tool extenders for ER collets sized ER8 thru ER25.

Use for CNC tooling extension or as a temporary collet reducer.


Extension length should not exceed a 4:1 ratio of length to diameter. For example, a 1/2in shank should not extend more than 2in in front of the holder. This is true only for applications where the extension is rotating.

Extenders have threaded thru holes for a backup screw. Includes nut.
Collet and wrench sold separately