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Default How to Drill Out a Broken Bolt?

"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit you
over the head about the rest of them?


Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with his
broken bolts already), but wasn't he the guy who asked what the difference
is between foot pounds and inch pounds a while back?


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Default How to Drill Out a Broken Bolt?


Ernest Scribbler wrote:
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit you
over the head about the rest of them?


Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with his
broken bolts already), but wasn't he the guy who asked what the difference
is between foot pounds and inch pounds a while back?


Good Lord, give him credit for trying to do his own work. So he makes
expensive mistakes, I bet he learns from them. I have managed to break
5 drill bits in rapid succession.
Now, If I remember, there are special tools for removing broken bits or
taps. I suggest he look into a tool catalogue such as McMaster-Carr or
MSC.

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Default How to Drill Out a Broken Bolt?


Frogwatch wrote:
Ernest Scribbler wrote:
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit you
over the head about the rest of them?


Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with his
broken bolts already), but wasn't he the guy who asked what the difference
is between foot pounds and inch pounds a while back?


Good Lord, give him credit for trying to do his own work. So he makes
expensive mistakes, I bet he learns from them. I have managed to break
5 drill bits in rapid succession.
Now, If I remember, there are special tools for removing broken bits or
taps. I suggest he look into a tool catalogue such as McMaster-Carr or
MSC.


I have several tiny hardened end mills from MSC. They are no wider
than a screwdriver blade and cost about $20 each and I have used them
for such tasks to get down into a bolt hole (using the dremel tool) to
make a screwdriver slot. You can also use the tiny diamond burr with
th dremel to make a "dent" atop the broken bolt for the drill bit to
start on when you drill it out.

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Default How to Drill Out a Broken Bolt?

Frogwatch wrote:
Frogwatch wrote:
Ernest Scribbler wrote:
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit you
over the head about the rest of them?

Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with his
broken bolts already), but wasn't he the guy who asked what the difference
is between foot pounds and inch pounds a while back?


Good Lord, give him credit for trying to do his own work. So he makes
expensive mistakes, I bet he learns from them. I have managed to break
5 drill bits in rapid succession.
Now, If I remember, there are special tools for removing broken bits or
taps. I suggest he look into a tool catalogue such as McMaster-Carr or
MSC.


I have several tiny hardened end mills from MSC. They are no wider
than a screwdriver blade and cost about $20 each and I have used them
for such tasks to get down into a bolt hole (using the dremel tool) to
make a screwdriver slot. You can also use the tiny diamond burr with
th dremel to make a "dent" atop the broken bolt for the drill bit to
start on when you drill it out.


Yes, I used the Dremel tool with a diamond grind bit to form a slot on
top of one of the broken bolt, and I used a screw driver to remove that
bolt -- successfully.

But this didn't work for another two bolts that were sunk inside the
holes. The pointy grinding bit simply could not have a good angle of
attack on the bolt surface. What ended up happening was that the two
ends of the slot were slightly lower than the center of the slot and
this weakened the slot. When I used the screw driver to turn the bolt,
I ended up stripping the slot.

But this is kind of behind me now. As mentioned in my another reply, I
found an easy way to remove the broken bolts by simply removing the
water pump base, and this allowed the broken bolts to show up in the
open, and I used a channellock piler to remove the broken bolts.

Nice to talk with you.

Jay Chan

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Default How to Drill Out a Broken Bolt?


"Frogwatch" wrote in message

Good Lord, give him credit for trying to do his own work. So he makes
expensive mistakes, I bet he learns from them. I have managed to break
5 drill bits in rapid succession.


Not bolts...... I broke a head bolt on a Honda 50 when I was 12.....
not TWO head bolts.

-W




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Default How to Drill Out a Broken Bolt?

Clams Canino wrote:
"Frogwatch" wrote in message

Good Lord, give him credit for trying to do his own work. So he makes
expensive mistakes, I bet he learns from them. I have managed to break
5 drill bits in rapid succession.


Not bolts...... I broke a head bolt on a Honda 50 when I was 12.....
not TWO head bolts.

-W



I hate to say this, but from the questions Jay was asking in other
threads, it was obvious this would be the results. Since Jay likes to
do some of the basic work himself, he needs to find a shade tree
mechanic who will help him with some basics, such as telling the
difference between foot/lbs and inch/lbs. As long as he is doing "on
the job training" and is using rec.boats as his tutor, he will continue
to have problems.

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Default How to Drill Out a Broken Bolt?

"Ernest Scribbler" wrote in message
...
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit
you
over the head about the rest of them?


Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with his
broken bolts already), but wasn't he the guy who asked what the difference
is between foot pounds and inch pounds a while back?


Yes. Excellent question. However, I also agree with Frogwatch. You just have
to develop a feel for how much force things are able to take, and where the
gotchas are hiding. Try telling a 17 year old "With some screws, you want to
gently turn them in backwards until you feel or hear a click, or you'll
strip the threads". Mine said "Well, how do you know which screws?" I really
couldn't tell him, except to say that the higher the price of the thing
you're trying to fix, the more likely it is that you'll have a problem. :-)


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Default How to Drill Out a Broken Bolt?


"JoeSpareBedroom" wrote in message
...
"Ernest Scribbler" wrote in message
...
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit
you
over the head about the rest of them?


Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with
his broken bolts already), but wasn't he the guy who asked what the
difference is between foot pounds and inch pounds a while back?


Yes. Excellent question. However, I also agree with Frogwatch. You just
have to develop a feel for how much force things are able to take, and
where the gotchas are hiding. Try telling a 17 year old "With some screws,
you want to gently turn them in backwards until you feel or hear a click,
or you'll strip the threads". Mine said "Well, how do you know which
screws?" I really couldn't tell him, except to say that the higher the
price of the thing you're trying to fix, the more likely it is that you'll
have a problem. :-)


True story. In high school autoshop, yes we used to have those, the grounds
keepers for the sports field had their tractor in and were replacing a
muffler. The gardener asked how tight to make the nuts. Someone in the
class yelled out, "run it down until you hear a crack and then back of a 1/2
turn.". Everybody in the shop heard the crack as the U clamp broke. Class
went in to hysterics.


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Default How to Drill Out a Broken Bolt?

On Thu, 26 Oct 2006 04:35:50 GMT, "Calif Bill"
wrote:


"JoeSpareBedroom" wrote in message
...
"Ernest Scribbler" wrote in message
...
"Clams Canino" wrote
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit
you
over the head about the rest of them?

Not to jump on the jump-on-Jay bandwagon (he's got enough trouble with
his broken bolts already), but wasn't he the guy who asked what the
difference is between foot pounds and inch pounds a while back?


Yes. Excellent question. However, I also agree with Frogwatch. You just
have to develop a feel for how much force things are able to take, and
where the gotchas are hiding. Try telling a 17 year old "With some screws,
you want to gently turn them in backwards until you feel or hear a click,
or you'll strip the threads". Mine said "Well, how do you know which
screws?" I really couldn't tell him, except to say that the higher the
price of the thing you're trying to fix, the more likely it is that you'll
have a problem. :-)


True story. In high school autoshop, yes we used to have those, the grounds
keepers for the sports field had their tractor in and were replacing a
muffler. The gardener asked how tight to make the nuts. Someone in the
class yelled out, "run it down until you hear a crack and then back of a 1/2
turn.". Everybody in the shop heard the crack as the U clamp broke. Class
went in to hysterics.


Now *that* was funny!!
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Default How to Drill Out a Broken Bolt?

Clams Canino wrote:
I wanna know how you broke *three*.
I mean - after you broke one... didn't a clue rake at least try to hit you
over the head about the rest of them?


Actually, I could have broken all four -- instead of merely three. I
must have come to my sense when I was bearing down on the 4th bolt.

I have a tendency to over-doing anything (such as running my knee to
the point that I needed to have a surgery done on my knee). And
tightening up the bolts too much is one of my tendency. That was the
reason why I bought a torque wrench hoping that using the torque wrench
will prevent me from over-torquing the bolts. Unfortunately, I mistook
60-inch-pounds with 60-feet-pounds, and I ended up over-torquing the
bolts by 12 times. And the fact that the torque wrench that I use is
quite big (designed more for higher torque such as for torquing the
propeller); therefore, I didn't get a good feel of the tension. I have
ordered a 1/4" torque wrench that is designed for lower torque (such as
60-inch-pounds); hopefully, this will prevent me from making a similar
mistake.

Jay Chan



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