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Supergluing on a broken pedal knob?

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Re: Supergluing on a broken pedal knob?

Postby shufflebeat » Mon Apr 20, 2020 4:22 pm

This sounds like a job for...

PTFE!

That's the plumper's tape, not the psychological stress disorder.

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Re: Supergluing on a broken pedal knob?

Postby Wonks » Mon Apr 20, 2020 4:24 pm

It's a Teflon tape, so not great for gripping stuff. Its proper use is to lubricate pipe threads so the nuts are easy to do up (and also get off again).
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Re: Supergluing on a broken pedal knob?

Postby Eddy Deegan » Mon Apr 20, 2020 4:36 pm

I have smirked more in the minute or two reading through this thread than I have in total since Christmas :P

It got my attention as I've got a similar problem on a pedal of mine (a JD Sessionmaster). One of the knobs has snapped clean off with the head of the shaft still embedded in it flush with the base of the knob. I've been meaning to try and fix it for ages but haven't gotten around to it.

I was thinking about drilling a 2 or 3mm hole into both faces of the snapped shaft and supergluing a short metal rod in them to invisibly peg them together again, if that makes sense.

Any better suggestions welcomed. I'd rather not replace the pot if at all possible.
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Re: Supergluing on a broken pedal knob?

Postby garrettendi » Mon Apr 20, 2020 4:37 pm

Eddy Deegan wrote:I have smirked more in the minute or two reading through this thread than I have in total since Christmas :P

Glad to entertain you Eddy! With lockdown happening I haven't been here much lately but I'm trying to get back to being the Forum Jester!

After this is all over, you up for a Brighton SOSMeet?
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Re: Supergluing on a broken pedal knob?

Postby Eddy Deegan » Mon Apr 20, 2020 4:43 pm

garrettendi wrote:
Eddy Deegan wrote:
After this is all over, you up for a Brighton SOSMeet?

Definitely. I was even thinking of hosting one here* at some point, though I suspect it'll have to be next year now!

* Meaning my place, but need to get the loft conversion finished first and obviously that's been delayed
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Re: Supergluing on a broken pedal knob?

Postby Wonks » Mon Apr 20, 2020 5:05 pm

Eddy Deegan wrote:
I was thinking about drilling a 2 or 3mm hole into both faces of the snapped shaft and supergluing a short metal rod in them to invisibly peg them together again, if that makes sense..

I'd use a square rod as it will obviously be more resistant to turning. So just use a 2mm or 3mm square drill bit. ;)

The pot end of the shaft is only gong to be a couple of mm just below the break, so you haven't got a lot to drill into. You could easily go too far and break off the wiper.

Replacing the pot is by far the best solution in my book.
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Re: Supergluing on a broken pedal knob?

Postby zenguitar » Mon Apr 20, 2020 5:38 pm

Even if you could drill and pin, I doubt it would offer much strength. Once or twice turning it so that you hit the stop would probably be enough to break the joint.

Worth an email to Award-Session, they might have a NOS replacement or even be able to do the job for you.

Andy :beamup:
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Re: Supergluing on a broken pedal knob?

Postby Eddy Deegan » Mon Apr 20, 2020 6:09 pm

Food for thought - thanks chaps.
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Re: Supergluing on a broken pedal knob?

Postby Dynamic Mike » Tue Apr 21, 2020 12:02 am

shufflebeat wrote:This sounds like a job for...

PTFE!

That's the plumper's tape, not the psychological stress disorder.

This was my first thought too. Usually works a treat & causes no lasting harm when it doesn't. It's just a case of experimenting until you get the correct number of wraps.

Otherwise a blob of epoxy resin, just enough so that it doesn't drip out. Needs a good 24 hours to cure though.
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Re: Supergluing on a broken pedal knob?

Postby shufflebeat » Tue Apr 21, 2020 10:18 am

Wonks wrote:It's a Teflon tape, so not great for gripping stuff. Its proper use is to lubricate pipe threads so the nuts are easy to do up (and also get off again).

It is, but it's been doing similar jobs for me for some time. I just happened to have some lying round and chose it for it's very fine thickness, but it's been holding up.
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