potentiometer control shaft extension

WORKS ON REPLACEMENT SHORT SHAFT POTIENTIOMETERS

Example: My 1980's OPTONICA TURNTABLE RP-4705

Optonica was Sharp's high-end audio brand and its attempt to make inroads into the audiophile market.

This vintage direct drive turntable had a seized up speed potentiometer. (couldn't turn it)

Tried contact cleaner/lubricant… had the inner plastic melted from the incompatible cleaner/solvent  -well nice try

So I ordered a replacement part with the  same resistance but unfortunately the shaft was much shorter than original.

My luck..If it had been too long, I could have cut it and made the shaft shorter, but no luck this time. I needed a knurled shaft longer than the one on this part. 

WHAT TO DO??

I made a shaft extension to go from control to knob, enabling the use of the original and keeping the asthetics of it while giving the ability to use a new part.

This part will fit on the Prusa MK3 knob and shaft though it's not needed for it

THIS IDEA can be done for any vintage equipment that the shaft of the replacement is too short.

AUDIO MIXING BOARDS are notorious for control seizure (pan pots) 

Vintage Radios, Stereos, and other equipment…unsaveable /broken controls

ONE ADDITIONAL BENEFIT of THIS:  It acts as a "sacrificial buffer shaft" between the control and the knob, and can prevent control or knob breakage by slipping before breaking either part

You can easily customize by extending either the knob shaft end or the control socket to necessary length for your application. STEP file included.