Bionics Docs

Replacing SDS MK4 Tread

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We created a two part tread template to make drilling holes in the tread repeatable.

Tread Template

Tread is 1.5" wide and 11" long. Can be source from:

Tread Template CAD Template is made from .25" Lexan cut on CNC and glued together with CA Glue (aka. super glue).


  1. Cut tread to 11" length. We found tin snips work really well.
  2. Insert tread into template with backing against bottom lexan plate
  3. Clamp tread between scrap wood and template, drill through the tread
  4. Use a non-ball-end hex driver to install tread. Be careful not to crossthread. Chase threads with tap if needed.