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Radius sanding block routing jig
http://www-.luthiersforum.com/forum/viewtopic.php?f=10117&t=45780		 Page 1 of 1
Author:  Glenn_Aycock [ Sun May 24, 2015 9:15 pm ]
Post subject:  Radius sanding block routing jig
Just finished this jig - based on similar designs I've seen around various luth forums. Looks promising but it still needs a few tweaks.

Image

The router itself is questionable, but I didn't want to permanently mount my good PC router on it.

Tomorrow I'm going to put a larger bit on it and add a dust collection port.


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Author:  Glenn_Aycock [ Mon May 25, 2015 10:02 am ]
Post subject:  Re: Radius sanding block routing jig
Works much better with a 1/2" straight cut bit instead of a 1/4" spiral cutter. The depth keeps slipping. I'm not sure if it's the collet or the base. What a piece of crap.


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Author:  Glenn_Aycock [ Mon May 25, 2015 4:55 pm ]
Post subject:  Re: Radius sanding block routing jig
After replacing the wing nut with a lock nut and tightening everything up, it works much better.

Still not 100% - there's a bit of flex somewhere that throws the cuts off. I may try a round nose bit.
Author:  Glenn_Aycock [ Tue May 26, 2015 12:15 pm ]
Post subject:  Re: Radius sanding block routing jig
Got it dialed in now - with the straight cutter. Round nose bit not recommended.

Turned out to be an engineering problem. The upright was flexing due to my downward pressure as I swung the router. I reinforced it and added a handle close to the side to minimize flexing. It works reasonably well now.

I can't really say it was economical, but I can make blocks in any length and radius up to 22".
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