5x GEAR for 800K or 2MB SONY FLOPPY DRIVE MP-F51W MP-F75W and MFD-51W
This little gear is the exact copy of the original, it's been produced with a Mold and not with any 3D printer. The OMRON eject mechanism is present in both of the 2M and 800K Macintosh Floppy Drive ( SONY MP-F75W, MP-F51W or MFD-51W). I already repair dozens of these drive in the last years testing the quality and durability of my solution, i started this gear project in the beginning of 2015 publishing some references into Macforum.com by December of the same year.
Gears updated today in May 2024 are improved by an updated mold and the material used with the injection molding; the material is POM is the best material today for gears, it gives to the gear a self-lubricating, durable, rigid appearance with reduced friction to improve the overall life of the OMRON ejector mechanism. There was nothing wrong with the previous gears, but I decided to improve them after more than 10 years of production with the aim of reducing costs in favor of the trust I continue to have from all classic Macintosh computer enthusiasts all over the world.
Through the injection molding process, it is possible to create gears that can use POM, guaranteeing unparalleled performance and durability. While polyamides have been the go-to material for gears over the past decades, the today evidence suggests their degradation after their aging of 20-30 years.
The Macintosh will remain operational and fully functional with its floppies for many years to come; it is a true piece of history to be preserved. ^_^
To repair by substitution of the gear this little Engine is really easy, only 2 screws (+) and a plug to disassemble it from the drive:
Following pictures are example where the gear need to be changed; to notice the dark-orange color of the last completely destroyed gear due to its advanced stage of Oxidation :
Here below before/after with the new gear, be careful when unplug the metal plate,
with a little flat screwdriver moving the rigid black-plastic hook gently :
Shipments are offered true a standard International MAIL and is free of charge but can take time to be delivered;
if you need a by forwarder shipment ,please just ask me for the quotation.