Keeping knobs tight?

[peAk]

I seem to have an issue with knobs getting loose. Is this a type of pot shaft issue? set screw issue?

I am always afraid to strip out the set screw in these knobs and so I don't go extra tight.

Is it a cheap knob issue?

It's worse for me with knobs on rotary switches.

Any advice?

[alanp]

Cheap knobs, I'd say. With the Erthenvar 1900H, the set screw locks into a metal collar (that the outer plastic is covering), so I'm never afraid to crank it down, whereas with a Tayda 1900H I'd be quite a bit more timid about it, since the plastic threads in the Tayda one strip easier than the metal threads in the Erthenvar.

[flanagan0718]

You could try some lock tight on the set screw. Never done it on a pedal but I do use lock tight frequently.


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[selfdestroyer]

You can try using thread seal tape on the shaft of the pot before you put the knob on. Might make a tighter fit.

Cody

[muddyfox]

Normally I put heatshrink on knurled pot shafts to fix knob wobble. It also gives the shaft some "give" and increases the screw tightening margin for error.

That said, there's no helping Tayda 1900s...  That plastic strips even before you take a screwdriver to it. You look at it funny and it's stripped. I can be arm-twisted into buying all sorts of crap from Tayda but there are two things I'd never ever ever buy from them ever again and that's 1n34a and their beyond-POS 1900 knobs.

[peAk]

Thanks for the suggestions guys. Definitely some good ones.

I was just curious if I was having some bad luck or if this was a common issue.

[Leevibe]

For rotaries that take a lot of torque to turn, there are knobs with two set screws. I think that would do the trick. I'm planning a build with rotaries that I plan to use them on. I have some aluminum 2 set screw knobs that I think I got at smallbear. Could have been mammoth.