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MG TD TF 1500 - Inner Tube Valve Diameter

New tyres and tubes have arrived and old ones removed ready for wheels to be powder coated. However the diameter of the air valves on my new tubes is less than on the originals and thus the hole in the wheels is too big. The tyre fitter, who is very helpful, has asked me to find grommets to bush down the holes. I checked the sites from various suppliers but can't find anything. Either I am using the wrong words or they are not available. Can anyone suggest a solution that doesn't involve welding up the holes and redrilling.


Jan T
J Targosz

What are the two dimensions?

Old holes?
New Tube stems.

Jim B.
JA Benjamin

Jan,

They often come with the new tubes I've bought for other applications, usually farm tubes. They're available, google tire tube valve grommets.

Jim
JE Carroll

Jan

If I can find them again, I will send you 5 of the grommets. When I did mine, I had to buy 50. Still have some left.

rgt3000 at fuse dot net
RG Taylor

I know Universal tire has them. They cost like a nickle each. Buttons, grommets, just call them the plastic valve stem wheel spacer.
D. Sander

Thanks for the replies and offers. Got some from a local tyre fitting depot - price zero!

Jan T
J Targosz

Today, I looked at stamping DUNLOP
I purchased 6 letter stamps but I have not made a holding fixture.
I jury rigged them in small machinist vise. I used a Hydraulic press and rotated the part to get the full letters. The results are less than stellar.
It has changed my concept of what the holder should look like.

It appears that I will need to have individual adjusters for each stamp. There is a large variation in stamping depth.
And I need better control over the pressure. I may need to add a gauge on the press to set the pressure repeatable.

On the bright side it looks like the font is close enough.

Back to the drawing boards.

Jim B.

JA Benjamin

This thread was discussed between 09/09/2014 and 24/01/2015

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