Spindle lock for PM25MV mill

This assembly is a spindle lock for a Precision Matthews PM25-MV milling machine. See the assembly instructions and bill of materials in the PDF file. Several parts can be purchased from McMaster and when ordering those one can choose between a basic spring plunger or one with a switch. The custom parts, here as STL and STEP files, namely the collar, shaft, and main body should be made from metal. See the following video for more details.

https://www.youtube.com/watch?v=ND8kULVNfDU