So I broke it...

[cdub101]

I was trying to change the blade on my Miter saw and snapped the head off the arbor bolt. So now I have a bolt shaft stuck in the arbor.

Does anyone know how I can get the shaft out? It is a dewalt DW703 if that makes a difference. I'd prefer not to have to take it to a repair center.

[AusRob]

You could try using a reverse thread extractor. Bore a hole into the broken bolt then use the extractor to remove it. If the bolt snapped, could be the rest is rusted in. Maybe use some lubricant as well?

Regards,

Rob

[LCHIEN]

forgot it turned the other way to loosen???

[LinuxRandal]

Different things to try, depends on what tools you have available:

If the bolt isn't a straight sheer (it has a hump), use a punch (nail, etc), to try to turn it out via the high spot.
If it has a couple of threads already out, vise grips (long nose style).
Screwouts, or boltouts.
Or if you have to drill it for an extractor, use a left handed bit, as at a slow speed, sometimes they will turn the bolt out itself.

[shoottx]

There are left hand drill bists and right hand thread extractors. My Nephew works for Mack trucks and has a set. They work well but are expensive

[Crash2510]

since the threads are reversed you might try predrilling the hole some and then running a normal thread tech screw into try to loosen it.

[eccentrictinkerer]

The machine shop where my brother works has a device that uses a copper probe wire and HIGH current to literally blast taps and bolt fragments out of tapped holes.

I never would have believed it it I hadn't seen it with my own eyes. It leaves the threads so clean that you don't evn have to chase the thread.

Check with a local full-service machine shop.

[cdub101]

Thanks. It did have a hight sopt. I had taken it in for service some time back and they tightened it with a death grip. i couldn't get it ti budge for the life of me. I broke the head off trying to losen it back so I could change the blade.I used an impact wrench to try and losen it. It started to turn and I should have left it alone once it got started but got lazy and kept using the tool, and off went the head. A masonry bit I had is notched and was able to spin the shaft out from the hight spot.

I usually don't give much thought to the thread direction. Another thing to the list of things to learn for this craft...

Thanks for all of the great tips.

[Tom Slick]

It's left hand thread, there is no need for specialized "reverse thread" tools because the bolt is already "reverse thread", in fact screw extractors won't work because they are designed to remove "regular thread" bolts. They will only tighten the bolt, making it worse. try using a regular drill bit to drill it out, if you are lucky the bit will grab and spin the broken portion right out.

This would be my process:
try to file any bumps down smooth
center punch the bolt as well as you can
using a small drill bit, around 1/8" or smaller, drill a starter hole at least 1/8" deep
next, use a larger bit, around 1/4", begin to drill using alot of pressure.
it should work it's way out.

if that doesn't work then post some pics and get more advise.