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Broken Drill Bit

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Forum topic by richgreer posted 11-30-2011 10:10 PM 1519 views 0 times favorited 8 replies Add to Favorites Watch
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richgreer

4541 posts in 2534 days


11-30-2011 10:10 PM

Has anyone else had this happen?

This is a 9/16” brad point bit. The tip just broke off in the middle of some white oak. It did not hit any embedded metal. It just broke. The tip stayed in the wood and I had to drill it out with another (high speed) drill bit.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.


8 replies so far

View Rick  Dennington's profile

Rick Dennington

5170 posts in 2654 days


#1 posted 11-30-2011 10:34 PM

Probably “Made in China” would be my guess…..

-- At my age, an "all--nighter" is not having to get up and pee...!!!

View Sawkerf's profile

Sawkerf

1730 posts in 2528 days


#2 posted 11-30-2011 10:55 PM

How sharp was it? Those bits are great, but they have an inherent weakness in the spiral. If the bit was getting dull, you were using a high torque drill, and somehow moved it off center, it could have broken like that.

-- Adversity doesn't build character...................it reveals it.

View TopamaxSurvivor's profile

TopamaxSurvivor

17654 posts in 3135 days


#3 posted 11-30-2011 10:56 PM

+1 for China ;-) I have use a lot of wood augers and never lost one, even hitting 16 d nails.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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TopamaxSurvivor

17654 posts in 3135 days


#4 posted 11-30-2011 10:57 PM

We call that style a ship auger in the trade.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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richgreer

4541 posts in 2534 days


#5 posted 11-30-2011 11:49 PM

In response to the “how sharp was it question” – - This is a seldom used bit. I’m sure I have used it a few times in the past, but not very often. I have never sharpened it. I would say that it was “close to new” sharp.

Yes, I assume it was made in China.

As an FYI – This is a Rockler bit. They market it under their own name. The smallest bit in the set (1/4”) broke the first time I used it. The shaft broke. It’s my theory that the shafts on this style of drill is not adequately strong on the small bits. No other bit in the set has broken (yet).

I think this is strange because the shaft did not break – the tip broke off. I’ve never experienced anything quite like it.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Bill White's profile

Bill White

4448 posts in 3420 days


#6 posted 12-01-2011 12:23 AM

Rich, it sounds like a call to Rockler to me.
Bill

-- bill@magraphics.us

View live4ever's profile

live4ever

983 posts in 2470 days


#7 posted 12-01-2011 01:42 AM

I had an auger bit within a mortising chisel break in the same fashion, which in my case was probably due to overheating.

-- Optimists are usually disappointed. Pessimists are either right or pleasantly surprised. I tend to be a disappointed pessimist.

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TopamaxSurvivor

17654 posts in 3135 days


#8 posted 12-01-2011 04:51 AM

It is metallurgy. Ii have used ship augers up to 1 1/4 diameter and 18” long. They lasted for years until we filed the spur off the side sharpening it. After it is gone, they don’t work as well.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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