WM-F10 "clicks". Has anyone found a fix for the cracked gear? (2025)

I was thinking about epoxy or super glue and baking soda or perhaps "blue stuff and green stuff", used for making miniature models or copies of, green stuff is basically epoxy, blue stuff for making molds.

I worked in a real time duplication house up in Vermont where we had 250 Revox B-215s, so I know them very well. I wish I had kept some of them when they closed the doors.

For now the only solution is a donor hub. I can't think of any other solution that will be strong enough to last (like adding a section of teeth from another broken hub)

Recreating these thin WM-10/100/501 type gears is on my list of things to try.
Currently I am working on recreating a clutch ring gear for the Panasonic RX-S40/41 (The only direct drive walkmans!)

For the WM-10/100/501 type gears it's going to be particularly challenging as the outer ring gear is probably too thin and fragile to be resin printed alone (The original is molded over the metal disc). So it will likely have to be a recreation of the whole hub. Which means it will not look as good as the original.

Thanks. Yes, I did check with "fixyouraudio.com" about it. His response...

"unfortunately, you are right :( There is no solution for this crack. This part is very difficult and expensive to produce in small amounts.

Kind regards,

Marian"

@Sergiu Do you know where to buy the RX-S40 gear? I searched and cannot seem to find an existing reproduction.

I did a quick mockup of the ring section of the WM-101 (I don't have any broken WM-10 gears lying around right now). I do not think this ring section alone is printable on resin printers, it is way too fragile.

I'll hit you up on that if my attempt fails. Would you happen to know a source for these Sharp/Kenwood clutch gears too?

My printed versions have held up well so far but I would prefer a proper POM molded one for something this small.

Made good progress on my S40 gear today, and improved the print quality. I think I'm one iteration away.

Since I had space on the build plate, I also gave printing the WM-101 ring a try. It actually survived the process (getting it off the plate) and fits well in the X-Y axis, but the Z axis (height) tolerances need work. The lip that goes under the gear also did not print properly. It gives me some hope that this might be possible.

Resin I'm currently using for gears is Siraya Blu Nylon, which is a consumer grade "engineering" resin. There is a new version of this resin that has lower friction (Blu Nylon Mecha) that was released recently, but it is not available where I am yet. So far my experience with this resin has been excellent for gears of this module size and larger (0.3mm for most walkmans). However, the WM-10/101/501 ring gears are so thin that I still have my doubts that it is a lasting solution. A molded POM gear would be much better.

Here's something else I am working on, a battery cover for the WM-10 series. I've got a long way to go on this one, the tolerances I have on this first iteration is too tight, the latch has too much friction.

maybe use a 3D printed version of it as a mould to cast a replacement in something stronger?

has it just split open (like the DD centre gear) or is there a chunk missing?

Would it be possible to photo etch a ring out of brass? Copper? Something like this: