This is a one piece, quick spindle lock for Sieg X3 and equivalent milling machines, such as the Grizzly G0463. It is made of a micro Carbon Fiber filled Nylon to prevent damage to the spindle. It slides on tightly to the spindle to hold the spindle still for operations such as broaching.

Quickly installs or removes within seconds. Does not require any modification to the mill.

We also made a number of other modifications / improvements to these mills, as they have been a great hobby mill for countless people. Please check them out here: Sieg X3 Page.