Reply by JAAune

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Posted on Good router bits that won't cost a fortune?

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1939 posts in 3368 days

#1 posted 01-12-2014 04:43 AM

For spiral upcut bits, you can use 2-flute, center-cutting aluminum-cutting end mills. Make sure they are in fact 2-flute, center-cutting aluminum-cutting end mills and not something else. Those bits are usually a little cheaper than the spiral bits sold by woodworking outlets.

That being said, if you’re ever after quality, Onsrud makes some terrific (but expensive) spiral bits. A few days ago I made a mistake on a CNC program and sent one of those bits into the head of a 1/4”-20 zinc-plated bolt at 16,000RPM and 80IPM. The router barely slowed down and the bolt head was neatly trimmed in half. The bit will have to be replaced due to minor chips on the edges of the flutes but other than that it survived and is still sharp.

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