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Broken Tuning Shaft Toshiba

Shawnanagans

Shawnanagans

New Member
I'm working on a Toshiba SMS-4550. While taking the knobs off, the tuning shaft broke. It's B-15 in the attached picture. I haven't been able to find a replacement online or locally (Portland, OR). Has anyone had success with epoxy or another adhesive? It looks like cheap metal, so I'm sure it won't work. Another thought was to 3D print one, but I'm worried about flexing and perhaps breaking again. Has anyone come up with a solution to this problem, or do I just give up on the tuner?

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I have some Yamaha,Sansui,Pioneer parts unit shafts for sure. I'll have a look see and see If there is any way.
 
kwayde said:
Try drilling the ends then pinning them together with JB Weld.
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Honestly, the unit isn't even worth a tube of JB Weld, letalone the effort to repair a broken brass shaft. Unless it has some magical sentimental attachment to the OP, I would strip it for a few usable parts and trash the rest.
 
restorer-john said:
Honestly, the unit isn't even worth a tube of JB Weld, letalone the effort to repair a broken brass shaft. Unless it has some magical sentimental attachment to the OP, I would strip it for a few usable parts and trash the rest.
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Maybe the challenge of fixing this is worth more than the unit is. I'm sure I've repaired crap that should have been pitched. I say fix it and save it from the landfill.
 
redk9258 said:
Maybe the challenge of fixing this is worth more than the unit is. I'm sure I've repaired crap that should have been pitched. I say fix it and save it from the landfill.
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This. Also, I’m more or less a noob at this, I’ve got the time and interest, and I’d like the experience before attempting to fix something worth more than a tube of JB weld.
 
elvi said:
This. I use stainless steel antenna rod. Center drill both parts, insert the trimmed stainess rod and use a metal component two part epoxy ( JB Weld, or a like product )
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I saw this suggestion when I Googled the problem. My issue is that I don’t have access to a lathe…yet. I’m touring a makerspace this week and maybe I’ll use theirs.
 
This is a perfect place to use "Silver Solder".

File the broken ends so they fit well together.

The hardest part is making sure the pieces are aligned properly.

I would probably try to find a piece of stainless tubing that the serrated fits into then tie the two broken pieces onto a small piece of Angle iron to hold them in alignment.

After Silver Soldering you will need to re-machine the "C" clip slot using a drill and a thin coping saw blade.

Silver solder is far stronger than regular solder.

You will need the appropriate "Silver Solder Flux" and a small propane torch.

Videos on Silver Soldering on youtube.

Hope that helps.

Edit: JB weld will not fix this for more than a day or two...
 
Buck Rogers said:
This is a perfect place to use "Silver Solder".

File the broken ends so they fit well together.

The hardest part is making sure the pieces are aligned properly.

I would probably try to find a piece of stainless tubing that the serrated fits into then tie the two broken pieces onto a small piece of Angle iron to hold them in alignment.

After Silver Soldering you will need to re-machine the "C" clip slot using a drill and a thin coping saw blade.

Silver solder is far stronger than regular solder.

You will need the appropriate "Silver Solder Flux" and a small propane torch.

Videos on Silver Soldering on youtube.

Hope that helps.

Edit: JB weld will not fix this for more than a day or two...
Click to expand...
This looks like the winner! Unless I can find an intact part…
 
I've repaired at least a dozen shafts using this method.

Sad to say I also have at least a dozen misc tuner shafts, But where could they be within 700 or 800 lbs of torn down two channel receiver detritus...??
 
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