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I have some East Indian Rosewood binding that I am getting ready to install with .040 purfling. I have the Stew Mac binding router set.

When I test cut with the .090" bushing, the binding sits proud about .020" and will have to be scraped flush to the side.

When I test cut with the .100" bushing, the binding sits recessed about .020" and the sides will have to be scraped flush to the binding.

Which one do I go with? I have not included the glue. I have read that glue will take up room, but I did not experience this on my first binding job which was with plastic binding and Duco cement. This job is wood binding and Titebond.

Thanks

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Guitars...One's too many...Twenty is not enough.

Take the .100" bearing and add two layers of scotch tape to it. this should get you right at flush. Test the cut first.


Rap one time, use a razor to match the seam of the tape so that the seam edges are flush with each other. (not over lapped) Rap the second rap with the seam 180 deg apart from the first again making a flush seam. in essence you are enlarging the bearing by about .003" per rap.

I would also check your bearings because the difference you describe is .040" not the .020" difference expected. somthing is wrong here!MichaelP38985.648587963

Brilliant!!!!!!!

Thanks a lot Michael. This is a great idea. I was going to throw the binding in my drum sander, but your idea is much better.

Doug

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Guitars...One's too many...Twenty is not enough.

like I updated my post to say. there should only be a .02 difference in the cuts of the two bearings.Check your bearing OD something is wrong in this picture.

taking your bearing to a sanding disc would be a big mistake the odds of you keeping it true round would have been no way J'ose pluse the outer race of the bearing is most likely 316 ss. besides out of rounding it you would have contaminated the stainless, messed up the ultra fine micron ground finish. Nothing good would have come from it.MichaelP38985.6591087963

Michael, I think he meant sand the binding down a little, not the bearing.

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Dave Rector
Rector Guitars

Michael,

I wrapped 4 pieces of that magical blue tape around the bearing and the cut is now flush to the binding. I love it....great solution.

Thanks a lot. Now I can always cut perfect channels!

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Guitars...One's too many...Twenty is not enough.

Yep my miss read

I just have this thing about lop-sided bearings

Doug, the four layers of blue masking tape will compress slightly resulting in possible unevenness. As Michael suggested, use Scotch tape. It is stiffer so it's a better material for a shim.BarryDaniels38986.4396875