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Metal Templates?


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I've been thinking recently about using metal templates. Can anyone see a problem with this?

I can imagine that wear on things like router bits would be greater, but I think that the extra wear would be minmal as I don't them very often. Also I have fairly cheap bits at the minute so I'm not that worried about a bit of extra wear.

Currently I've pretty much finished the CAD plans of a National Resonator so that it can be laser cut. I figure that I can get any guitar shape cut out of a bit of thicker metal and use that as a template. I think that this would be a big advantage when it comes to symetrical guitar shapes like the LP DC as there wouldn't be a need to flip over the template, therefore another possible error has been eliminated.

Anyway, any suggestions on this would be appreciated.

Cheers guys

Kaj

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I guess I am old school but my bits never touch my templates. I use routing collars around the base of the router instead of bearings. Hence, most of my templates are 10 ga. to 3/16" steel or aluminum or phenolic. If, for some reason, you need the shank of the bit to rub on the template, stay away from phenolic! OHHH, the smell!

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Or you could use pattern bits with a guide bearing. That is what I use most of the time. The collars also work very well.

I have used aluminum templates. The best parts about aluminum is that you can route it from your old templates (if you have them). Often I will use 1/4" MDF to fabricate a template for my templates. This way I can change the shape easily. This can be attached to a piece of aluminum, cut close to size and finished up with a router pass. Works great.

You probably already know this but I'll say it anyway. Don't try this with steel. Your bit will shatter and you might get hurt.

~David

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I never even gave a thought to routing steel. What a horrible thought! I build hi-def plasma CNC machines and a new template made of steel or aluminum is about 5 minutes away. We ALWAYS keep a "demo" model in stock to do government work. Nudge, nudge, wink, wink. Nuff said, nuff said. (another Monty Python quote) :D

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Well, we've (we meaning me and the luthier that I'm working with on a metal bodied National resonator) have had a LOAD of stuff back from the laser cutters and it's cheaper than thought.

I think I'll give it a go with the steel (I'll see how aluminium laser cuts because if I accidentally hit the template with the router, I'd prefer the template to break rather than have bits of shattered router bit in my legs - there's a possability that it might not work though as aluminium is flamable :D )

Cheers for the suggestions guys.

Kaj

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