Wiggle of prosthetic wrist mount in carbon socket [parts]

After a few years of normal (ableism /R&D speek: "extreme uncanny never heard of insanely maximal) use (ableism/R&D speek: "abuse"), finally my wrist (that was built to not wiggle ever...) caused the carbon socket mount to wiggle.

There, the carbon socket contains four screw holes for M3x6 screws to keep the steel wrist in place. These bore holes, over the years and over a few screw replacement, got worn out.

So, ...

I first placed a 5 mm bore out over the inner wrist mount screw threadings.

Cybathlon rule maker/referee tip: if ever you plan to use prosthetic repair as test task, which would be totally sensible, I suggest you do not assign hand / prosthetic use with bluelight-special, but allow "pilot" to fully freestyle this; use screws and correct types of mounts as outlined below, and not hammer / nail, and use electric drill, not manual drill, for that; be flexible with use of position;

Then I placed a correctly sized drive-in-nut (Einschlagmutter) into the new carbon socket bore hole, over the inner wrist mount screw threading.

Subsequently, I put a hardened M3 screw and a lock washer.

Wiggle, gone.

Update Oct 31 2021, no screws came loose, wiggle stay gone!


Cite this article:
Wolf Schweitzer: swisswuff.ch - Wiggle of prosthetic wrist mount in carbon socket [parts]; published 05/09/2021, 15:15; URL: https://www.swisswuff.ch/tech/?p=12065.

BibTeX: @MISC{schweitzer_wolf_1638803256, author = {Wolf Schweitzer}, title = {{swisswuff.ch - Wiggle of prosthetic wrist mount in carbon socket [parts]}}, month = {September}, year = {2021}, url = {https://www.swisswuff.ch/tech/?p=12065} }