The tension control knob on my eliptical machine broke so I designed a replacement inner “sleeve” to repair it.

You have to disassemble the knob, breaking a couple of glue points to use this repair part.

Watch out for the spring detent balls. You will need them when you reassemble.

I re-used the label from the broken part, but you can print a replacement using the attached PDF file

PLA has been sufficiently strong for this part.