Many Technics/Panasonic tape decks use this gear for tape transport. They were created from semi-flexible material that tends to crack during the time (well, the parts were produced back in 80’s or 90’s).
You can recognize problem with this gear when you hear ticking noise during playback. At the end you would not be able to play the tape at all, or only in one direction if you have reverse deck.
You can download service manual and disassembly the unit by following steps there. It should not be too complex. The gear is located typically here, the description should be RDG5772ZC.
Broken gear can look like this:
Then you can replace broken gear with my 3D printed one. It is also made from semi-flexible material that is similar to the original one. It was tested in many machines and it operate smoothly without noise.
You can see function demonstration bellow:
..and example video how to replace the gear – thanks to 阪急5132
Part is compatible with following devices:
MS20, MS600, RS-CH550, RS-CH700, RS-CH900, RS-T9023, RS-TR210, RS-TR232, RS-TR252, RS-TR252PK, RS-TR262, RSTR262PK, RS-TR265, RS-TR311, RS-TR333, RS-TR515, RS-TR535, RX-CT990, RX-DS05, RX-DS35, RXDS620, RX-DS790, RX-DT07, RX-DT5, RX-DT501, RX-DT680, RX-DT690, RX-E250, RX-E300, SA-CH11, SA-CH150, SA-CH150PPK, SA-CH455, SA-CH455PK, SA-CH52, SA-CH55, SA-CH72, SA-DH66, SA-VC10, SU-CH80, SU-CH82, SU-CH90, SU-CH92, RX-DT501, RX-DT505, RX-C300, RS-TR157, GX-89CD, RX-DS620, RS-TR355, RX-DT707, RX-DS30P, SA-CH33, RS-B55, RS-955, RS-TR165.
It might work also with other devices – just check your service manual.
Available for purchase – go to shop.