Reverse twist drills

[themess]

Where can I find them?

I broke off an exhaust flange bolt, despite taking lots of care. I need to start the extraction process.

Thanks

[SqDancerLynn1]

Any good bolt supply should have them. You can order them from places like McMasters

[Hammered]

Any local Graingers of Fastenal will

[Nessism]

Harbor Freight sells a set too.

[posplayr]

http://www.google.com/search?rls=ig&...g4g-m5&aql=&oq=

they are everywhere


but don't be temped with this..................

http://www.amazon.com/Neiko-10-Piece-Alloy-Extractor-Cobalt/dp/B000F9ANQW

[Ranger]

Lowes has a great set for $24 right now.

[Graham]

autozone has them

[mighty13d]

home depot. (I work there so I had to suggest theirs too)

Be careful using them because if you take too much meat from the bolt, the bit can expand the bolt causing it to not come out and instead just break the bit in there. That's hardened steel and a PITA to get out. Ask me how I know... cost me $80 at the local machine shop to fix it. He just shook his head at me and I shrugged.

[DanTheMan]

Auto Value and Napa carry them as well. They aren't cheap though....

[themess]

Local Home Depot doesn't have them. I bought two at Menard's, of all places. Also three cobalt bits for the pilot holes. I'm thinking that I should have tried some of the Locktite bolt freezing & lubricating solution before attempting to remove this. I might buy some to use before beginning the extraction process.

At least it broke off flat, so I stand a chance of getting the hole centered.

Thanks for all the suggestions!

[tom203]

Where can I find them?

I broke off an exhaust flange bolt, despite taking lots of care. I need to start the extraction process.

Thanks

Any buddies in machine shop ? left hand bits are very common on both B&S and swiss style automatic lathes. Do not buy cheap drills!!!! or you will discover more fun.

[themess]

I wish that I had buddies in a machine shop! There's darn little of than in Lafayette. This is primarily an outgrowth of a college town.

[argonsagas]

I would be inclined to use an easy-out INSTEAD of a reverse twist drill.

You drill the broken bolt to near max tolerance, then drop in the easy-out.

If buying this type of tool, then there are two warnings.....

First stay away from anything that has a spiral/thread. Use fluted ONLY, and NEVER, NEVER, NEVER buy cheap ones.

[tom203]

I would be inclined to use an easy-out INSTEAD of a reverse twist drill.

You drill the broken bolt to near max tolerance, then drop in the easy-out.

If buying this type of tool, then there are two warnings.....

First stay away from anything that has a spiral/thread. Use fluted ONLY, and NEVER, NEVER, NEVER buy cheap ones.

Well, do the drilling with a left handed bit and you might not have the need for the EZ out which are VERY brittle and will likely break as you breathe .

[hikermikem]

I'm thinking that I should have tried some of the Locktite bolt freezing & lubricating solution before attempting to remove this.

Tried it - waste of time & money IMHO...