[Land-speed] Sealing two piece wheels

NT788 at comcast.net NT788 at comcast.net
Thu Dec 20 11:56:01 MST 2007


The last 17"o ring grove I cut to spec. failed I had to screed the grove half full of black urethane wdsd. caulk. It then worked fine. Jack

-------------- Original message -------------- 
From: "Rick Byrnes" <Rick at RBMotorsports.com> 

> Jim 
> If the wheels have an "O" ring groove, a rubber O ring will do the job 
> nicely, helped with a little vacuum grease or at worse RTV. If the surfaces 
> are unblemished no crutch is needed. The real deal for rubber gasketing is 
> making the groove to design spec, and squeezing the rubber 15 to 20 %. My 
> little 500X5 Garlits tire 2 piece wheels are alum with 0 ring grooves, and 
> only 2 of them currently leak :-D 
> That's kind of why I added the bit about crutches. 
> If the wheels have grooves, I can help with 0 ring selection, but if you can 
> get your hands on an O ring handbook, the groove vs. O ring dimensions are 
> clearly defined for face sealing that we are dealing with here. 
> If you need help feel free to ask. I'm not always quick to respond, but I 
> will and I do have a Parker handbook. 
> I"ll be more than happy to help. 
> If wheels are large, sealing may be a little tougher, but all the same 
> principles apply. (if you have a groove) 
> There is a major problem using rtv in any joint that has a chance of parts 
> moving relative to each other. The shear strength is quite low, and 
> movement as little as .004" will cause adhesive delamination and leaks. 
> 
> Rick 
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