Sieg SX2P mini mill spindle lock

thingiverse

This Spindle Lock mechanism is designed for the Sieg SX2P mini mill with an R8 spindle. The idea to create one came after watching Charlie Sarsfield's YouTube video, where he crafts a metal version. His channel can be found at https://www.youtube.com/channel/UChOFg9IOHWC9jk0ydsRYk3w. My dimensions differ slightly from Charlie's. Initially, my V1 had a tendency to rotate when tightening the R8 bolt due to a small gap between the plastic part and the mill. This issue was resolved by creating a 1.5mm shim out of plastic (the STL file is included). A new version, V2, eliminates this gap altogether. Both versions are available, but I recommend starting with V2. Additionally, you will need to machine a metal pin/bolt that fits through the plastic part (a diagram is provided). You can also incorporate a spring and pin to pull the pin/bolt away from the spindle when not in use; more information on this can be found in Charlie's video. I tested PLA and PETG filaments, achieving good results with 25% fill. This mechanism may prove useful for some users.