Adjustable Tonearm Weight Coupler for 1980's Akai AP-D33 Turntable
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This is a recreation of an oft-perished rubber part that connects the adjustable weight to the end of the tonearm on cer
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This is a recreation of a rubber part which connects the adjustable tracking force weight to the end of the tonearm on certain Akai turntable models from the 1980's. The original rubber part is over 40 years old and is often found in a very squishy, gummy state, leading to the weight drooping on the end of the tonearm before eventually falling off!
The original is mounted with a nut at the end, which helps to secure the bolt going through the weight assembly and rubber part. I found it extremely difficult to correctly position and screw into the nut once it was removed, so I designed this replacement to work purely on the pressure produced by the bolt being screwed into the TPU, which expands it enough to hold the assembly together.
The pictured part was printed on an Anycubic Kobra S1 using the default TPU parameters, and grey Elegoo 95A TPU. If you don't have a printer capable of printing TPU, a PLA version of this part may still work, but you would need to shorten the end slightly to mount it with the nut used with the original rubber part - I also have a feeling that a hard plastic part may lead to extraneous vibrations compared to TPU.