Mitsubishi MF501B floppy lock arm
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Replacement lock arm for the 360kB Mitsubishi MF501B floppy drive
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Model information
- Source
- Printables
- Category
- Computers
- License
- Creative Commons — Attribution
This is a replacement lock arm for the Mitsubishi MF501B 360kB floppy drive. I needed it for MF501B-312M, but I suspect it is compatible with other early Mitsubishi 5.25 floppy drives, with bolt mounted lock arms.
I loosely followed the design of the original (I had another drive with lock arm), but omitted the screw hiding cap and added a draft on the floppy side, because without it touched the faceplate, probably due to printing/post processing inaccuracies.
To mount it, you will need an M2 bolt. I used M2x8, but I think anything between 4-10mm length would work.
This should be printed on its side with tree support and brim:
I originally planned to print it on its front side, but it immediately broke the pegs it uses to mount to the drive. I used high infill and perimeter count (60 and 4) to get a strong part. After printing, you will probably need to clean the hole towards the drive, I used a 3.6 drill bit manually (i.e., rotating with my fingers). You probably need to file off the part where the brim was attached too. I printed this from ABS, this post-processing is likely more difficult if printed from PLA.