Double Bass Endpin rubber unscrewing

May 31, 2013
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I have new bass (yay! ;-) ) but it's endpin rubber is not that great. It's the one that you wind up on the thread.
Thing is, that it's unscrewing a little after few minutes of playing and starts buzzing on some notes. During practice I can tighten it, but would like not do that during a gig.
I will replace it eventually, but do you have any ideas with what to smear the screw to make it stay in place better? But nothing permanent, because I will replace it in the near future.
 
I also have a new double bass and experienced the same issue. My solution was to screw the rubber stop about half way up the thread. It allows the bass to swivel smoothly while you play. The movement is silent. The rubber stop (and bass) is anchored in the same spot. Less wear and tear on the rubber, too!

@Ukiah Bass Thanks for reply, but I don't know, if I fully understand.
If i leave thread "half way up" isn't it lose and can drop of the endpin while transporting?
 
If your endpin has the little brass bushing at the top of the threads that the endpin foot screws up against like mine does, maybe a rubber washer in between the bushing and the endpin foot would give enough friction to hold it in place.

Yes, it has this "brass bushing". Is this part really necessary? When I take it of completely there is no buzzing..
 
I have always hated the "screw on" approach. For years I offered a titanium pin with a "press fit" Delrin bushing which presses snugly onto the pin, and the rubber crutch tip presses snugly onto the bushing. No rattle or risk of falling off. They were as popular as gangrene, so I stopped making them. I do use this approach with my angled endpin product, and no one has complained about it. The problem here is that everyone in our world is hidebound. The majority of players and repairers are unwilling to consider a design without threads, ergo no manufacturer is prepared to offer one.
 
This shows the rubber endpin slightly unscrewed for noise-free swiveling.

RubberEnd-sm.JPG
 
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I have screw-on tips on my basses and they rarely come loose. Just crank it down harder.
The advantage of a threaded pin is that you can quickly and easily go from spike to rubber tip. The purpose of the brass disc is to stop the bottom of the threaded insert in the rubber tip from hitting the sharpened end of the end pin and dulling it.
 
My press on design also allows you to quickly change from point to rubber tip, only faster, and it is lighter!
Oh, yeah, I re-read your description of it. Couldn't be simpler.
end pin.jpg
Here's my much more complicated Lou DiLeone creation: It's a 1/4" brass nipple reamed to press fit onto the 10mm pin. The tip is 1/4" galvanized coupler that a 3/4" crutch tip fits perfectly onto. The beauty of this setup is that if you lose a tip, you can get the parts at most hardware stores for a few dollars.
 
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Here's my solution. Piece of dowel; drill a longitudinal blind hole; epoxy onto end of rod; shave down to make a tight fit into the crutch tip. The larger tip's ID actually has a step thus the step on the dowel.

I never use a pointy end pin. Most places I play, someone would kill me if I stabbed that thing into the floor.
Picture1.gif
 
I'm not fond of using a crutch-tip (at an angle), or a large sphere to adequately grip the floor/surface.
I fabricated this endpin gizmo which has a spherical shape underneath the rubber covering, so that there is a minimal footprint & (therefore) maximum pressure and grip between the surface of the floor and the gizmo.
It takes just seconds to remove the gizmo to expose the very sharp point, if necessary.
IMG_4033.JPG
 
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