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post #1 of 10 Old 12-04-2009, 02:47 PM Thread Starter
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How Did You Do It?

Recently I've been reading elsewhere about several broken router bits. I just don't understand the how part.

I've been using a router for well over 30 years. In that time I've broken one router bit. The bit broke because I dropped the bit onto a concrete floor and chipped the carbide.

Isn't using a router all in the "feel"? There are times when I feel that I'm going a bit too heavy and either need to back off on the feed or take a shallower cut. I've hit metal that was inside the wood and ruined the bit. I've hit the power cord and ruined the bit. I've just never actually "broken" a bit.

So the question is, "How does one break a router bit during a cut?"

Use the right tool for the job.

Rich (Tilting right)
Huntington Beach, California
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post #2 of 10 Old 12-04-2009, 03:53 PM
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I broke a router bit hitting a nail in the table below the piece I was working on once. Since then I have purchased better router bits and I dont think they would "break" so much as chip.
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post #3 of 10 Old 12-04-2009, 05:55 PM
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Rich,
I have only had two bit break on me. They were both 1/4" chinese cheapies. I don't remember doing anything unusual, they just broke halfway through the cut. Normally it shouldn't happen if you aren't abusing them.
Mike Hawkins
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post #4 of 10 Old 12-04-2009, 06:33 PM Thread Starter
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Quote:
Originally Posted by firehawkmph View Post
Rich,
I have only had two bit break on me. They were both 1/4" chinese cheapies.
Ah! The magic words!

Use the right tool for the job.

Rich (Tilting right)
Huntington Beach, California
Remember that when we have the "BIG ONE" everything east of the Rockies falls into the ocean.
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post #5 of 10 Old 12-04-2009, 07:01 PM
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I only have HF bits, two sets. I have never broken
a bit. I have used some of them a lot!

A friend of mine that operated a cabinet shop for
years only used HF bits. I asked, he never broke
a bit. These were used on a production line type
set up. Several tables set up to do one thing,
all day long. With employees doing the work.

He only used 1/4" shank bits.

There is something else going on here?


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post #6 of 10 Old 12-04-2009, 09:49 PM
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I've had one bit break during use but it was a cheapo 1/4" straight bit and I let it overheat pretty badly in a hardwood. I agree w/ the statements above that this is unusual and a chip is more likely than a break.

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post #7 of 10 Old 12-05-2009, 08:18 PM
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Lemmie ask this....... how many of the ones in question were the straight cutting 1/4" (or 1/2") upward or downward spiral type? They could have been solid carbide which is brittle. There's loads of variables that don't get mentioned. I've bent the shank on a couple of 1/4" cheapies.....(not tightened in the chuck well enough) but never really broken one.
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post #8 of 10 Old 12-05-2009, 09:49 PM
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MD,
The bits I broke were shaped cutters, so not a spiral at all. My good bits are either freud specific purpose sets, or white or bosch. The couple of cheapie sets I have I bought at tool shows. They give you 30+ bits for 39.00 in a wooden case with plexiglass doors. They are fine for small edge details and the like.
Mike Hawkins
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post #9 of 10 Old 12-06-2009, 03:25 AM
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The only router bits I have ever broken are the "keyhole" type bits. The ones that cut the hanger slots on the backs of shelves and such.
Root cause...too much force on my part. They are fragile little things.
Mick
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post #10 of 10 Old 12-06-2009, 04:52 AM
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With normal and proper use, 1/4" shank bits work fine for me, even the "cheapies". The bits that are very subjective to breaking are the solid carbide bits. They are very brittle.

I don't find much difference in the high priced bits as far as structural integrity. The carbide tip composure may be of a higher grade, and may stay sharp longer. I don't conduct my own tests.




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