Reply by Peter Oxley

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Posted on Breaking two router bits in a row

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Peter Oxley

1426 posts in 4078 days

#1 posted 09-14-2010 06:00 AM

I’ve had similar problems with bits 1/4” and under: I make a cut that is exactly like other cuts I’ve made before, but this time I break a bit or two. Each time I’ve traced the problem to run-out. If your collet or bit shank have anything on them, or if the bit is too far or not far enough into the collet, it can cause the bit to wobble just a little bit, and this can be enough to break a small diameter bit. If you’ve eliminated other possibilities (cut too deep, feed-rate too fast), you may need to do a really good cleaning of your collet.

Maybe someone else can suggest some other possible problems??

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