Freud Carbide 2-1/8" Forstner RPM speed? - Router Forums
 
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post #1 of 7 (permalink) Old 06-15-2012, 06:02 PM Thread Starter
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Default Freud Carbide 2-1/8" Forstner RPM speed?

Newwwwwby here, I'm drilling into doubled 3/4" plywood (soft) and need to know the factory recommended rpm range. I'm using the Freud FC-016. Any help will be appreciated.
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post #2 of 7 (permalink) Old 06-15-2012, 09:48 PM
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Keep it in a drill. Forstners aren't meant to chuck in a router.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 7 (permalink) Old 06-15-2012, 10:06 PM
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I recommend 500 rpm or even less for a bit that size. as Charles said DON't run it in your router!
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post #4 of 7 (permalink) Old 06-16-2012, 12:45 AM
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Amazon.com: Magnate 1807 Hinge Boring Router Bits - 2" Cutting Diameter; 1/2" Shank Diameter: Home Improvement


http://www.amazon.com/s/ref=nb_sb_no...ng+Router+Bits

Product Description
This carbide tipped bit/cutter is specifically designed and manufactured for the high quality demanded by woodworking industrial applications.
The cutting edges of this router bit are made from high industrial grade micrograin carbide tips brazed onto a heat-treated high-carbon steel body thus leading to exceptional hardness and rigidity.
Good for creating recesses for hinges when using a hinge template guide and also good for cleaning out rough dado cuts.
For laminates, plastics, pressed boards and solid woods.

These bits create clean entry holes with smooth interiors.
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post #5 of 7 (permalink) Old 06-16-2012, 01:17 PM
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type in 'drill bit speed chart' in google and you will find many charts that will help. Wood magazine has one i like.
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post #6 of 7 (permalink) Old 06-17-2012, 08:40 AM
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Hi, 'n welcome. It is confusing, isn't it?

Freud publish in FAQ on their website, cutting speeds for very large router bits as fast as 3000rpm.

Many manufacturers however recommend 400rpm (hard wood) and 500rpm (soft wood) for Forstner bits. I use a chart from Australian Woodsmith, laminated by the drill press and it says 400 and 500rpm.

I'm thinking that router bits cut small chips and, for half their rotation, actually fly through fresh cooling air. (Ignoring the blind fence breakout solution.)

Forstener bits, on the other hand, produce shavings and do their work surrounded by wood and sawdust/shavings. Also, F-bits rely on their outer surface riding in the hole to keep them straight. Thats how they work.

F-bits get hot in a drill press at 500rpm, no way I'd spin one in a router.

But I'd be pleased to hear other opinions.

C ya.
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post #7 of 7 (permalink) Old 06-17-2012, 11:56 PM
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Quote:
Originally Posted by Bullybuster View Post
Newwwwwby here, I'm drilling into doubled 3/4" plywood (soft) and need to know the factory recommended rpm range. I'm using the Freud FC-016. Any help will be appreciated.
Welcome to the router forum.

Thank you for joining us.

As advised, I would not use a forstner bit in a router.....that is what a drill press is for......

James
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I don't profess to know everything, and I may learn something new.

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