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wrjjrs@aol.com wrote:
Steve,
Reaming will usually produce a better finish than boring. Carefull boring CAN produce a good finish but it is much slower.
Bill Jepson
Another way to skin this cat, that most likely won't help Steve, unless he want to make a new rail from scratch.
Replace the cutting bit in a tube cutter with a washer or a cutting blade that has the edge ground off. Use a bolt through the blade's hole to chuck it in a drill and run it against a grinder. You want a nice rounded blade to avoid stress risers. Run dulled cutter it around a 1/2"x.035 tube to make an internal swage. You can dial down to the perfectly sized ID. Make another swage just a little higher on the tube with a diameter just a couple thousandths smaller. The O-ring now has a nice trap inside of a very smooth 4130 steel tube.
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,|"|"|, Ernest Christley |
----===<{{(oQo)}}>===---- Dyke Delta Builder |
o| d |o http://ernest.isa-geek.org |
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