Broken Screw

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wickedrider
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Broken Screw

#1 Unread post by wickedrider »

I low-sided a Shadow 750, right hand side. The screw that holds the brake pedal and the foot rest broke with a portion left in the frame. Is there a way to get this remaining portion out. The threads in the frame seem to be intact
at this point.

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#2 Unread post by Johnj »

What you need is a drill index with lots of bits. Drill a small hole in the shaft of the screw, then use the next larger sized bit to make the hole larger. Continue to drill larger holes until there is nothing but the threads of the screw left in the threads of the hole. Now use a dental pick to pick out the rest of the screw.
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#3 Unread post by mgdavis »

Maybe something like an EZ Out would be a bit simpler, and safer for your threads too.
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#4 Unread post by wickedrider »

What is an easy out?

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#5 Unread post by jonnythan »

Johnj wrote:What you need is a drill index with lots of bits. Drill a small hole in the shaft of the screw, then use the next larger sized bit to make the hole larger. Continue to drill larger holes until there is nothing but the threads of the screw left in the threads of the hole. Now use a dental pick to pick out the rest of the screw.
No offense, but that's really silly.

They make a tool specifically to do this.

http://www.harborfreight.com/cpi/ctaf/d ... mber=40349

Basically, you use one of the included bits to drill a small hole in the center of what's left of the bolt half a centimeter or so deep.

Then you use a hammer and pound the extractor bit into the hole, lodging it in there good and tight.

Then, using a wrench, you twist the extractor bit.

Bam. Entire remaining portion of bolt comes right out.

Works like a charm.
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#6 Unread post by Sev »

Drill all the way through the bolt when you use the extractor. This will allow the bolt to "relax" somewhat and will ease tension on the threads making it easier to take out.

Oh and drilling slightly larger holes one after another is a good way to ruin drillbits.
Of course I'm generalizing from a single example here, but everyone does that. At least I do.

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#7 Unread post by Johnj »

Of course when you snap the ez-out or extractor off, then you will have a hardened piece of metal that you will need to drill a hole into. Good luck.
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#8 Unread post by jonnythan »

Johnj wrote:Of course when you snap the ez-out or extractor off, then you will have a hardened piece of metal that you will need to drill a hole into. Good luck.
Well, to put this in perspective.

I sheared the head off an exhaust bolt on my bike. The bolt was *so* stuck in its threads after 20 years of countless heating and cooling cycles that I broke the head right off.

Buddy came over with some wrenches, a drill, and his Harbor Freight extractor set. 5 minutes later, the bolt was out.

This guy's bolt was broken because of a crash, so it's not necessarily stuck at all.

I think it'll probably work fine.

I'd also be pretty impressed if the bolt remains bit into the extractor strongly enough to break it. The extractor would slip out or strip the bolt hole long before that.
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#9 Unread post by Sev »

Johnj wrote:Of course when you snap the ez-out or extractor off, then you will have a hardened piece of metal that you will need to drill a hole into. Good luck.
Drilling a new hole with 1/16th of the outer edge of a drill bit like you're suggesting is a good way to dull then shatter a drill bit. If you're lucky it'll shatter, if you're unlucky it'll just snap off leaving you with the same problem as the extractor breaking off.

The key to using an extractor is to be gentle with it - smooth even pressure. But they can and will snap off if you start jerking them around.
Of course I'm generalizing from a single example here, but everyone does that. At least I do.

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#10 Unread post by wickedrider »

Thanks everyone. Going to try the extractor. Will let you know how it comes out.(See how I did that, comes out). I forgot to tell you all that I don't know anything about things like this.l But I can read and follow instructions...sometimes.

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