Silicone O-Ring cord Stock

[KingTuba1241X]

Thanks to Dan Schultz for telling me about a certain Silicone O-Ring stock for rotary valve horns from McMaster-Carr. Red 1/4'' High temperature Part# 96505K25 will fit as bumpers for 186/187 tubas and probably more, if not all others. It will last forever and feels like pressing on a pillow they are so soft and quick. Kudos Dan for finding this stuff...maybe it's old news, but they work and I recommend them.

https://www.mcmaster.com/silicone-o-ring-cord-stock/

[greenbean]

I am using 1/4" Soft Buna-N cord stock, also from McMaster-Carr. I bought a 3-ft quantity - I am good for a while. I also received a few other types of cord stock with a tuba I bought a while back.

Perhaps we could send each other a few inches - as an educational exchange...

[bloke]

That size is plenty large enough, but - just for sake of appearance, and nothing else - I manage to shoehorn 5/8” diameter into those and similar applications, so – when I trim it for alignment, it has that “manufactured“ shape to the bumpers, due to them fanning out past the insertion shapes.
Again, it makes no real difference.

[Dan Schultz]

I manage to shoehorn 5/8” diameter into those and similar applications

That ought to be plenty big!

[bloke]

I manage to shoehorn 5/8” diameter into those and similar applications

That ought to be plenty big!

Once muscled into place and trimmed, it offers this o.e.m.-ish appearance:

response to Dan.png (1.75 KiB) Viewed 617 times

bloke "It's only a 'looks' thing..."

[Stryk]

One order is a lifetime supply for most of us!

[greenbean]

I manage to shoehorn 5/8” diameter into those and similar applications

That ought to be plenty big!

You can say that again!...

[bloke]

LOL...Of course, I meant to type 5/16ths.