What kind of spindle does Carvey use? November 28, 2018 18:38 Follow 300W DC spindle with RPM 3000 - 12,000 ER-11 precision collet for bits with a 1/8" shank. The collet can be swapped out to accommodate bits with 3/16" or 1/4" shanks. Related articles Does Carvey have built-in homing? What size milling bits can I use with Carvey? What motion controller does Carvey use? How many axis does Carvey have? How do I change out the collet on the Carvey spindle?