stud extractors

[Daggs]

Anyone ever found any stud extractors/inserters that actually work? I bought a set of the 'concentric roller' type. Tried them today, useless. They're going back.

[dave411]

Do you mean an extractor for removing a snapped stud/bolt,or one to take a stud out thats not snapped?

[Daggs]

It's a tool to insert or extract studs. It's supposed to replace 'double-nutting' them.

[Tractorman]

My snap-on concentric roller type has work very well for many years but it's a bit 'agricultural' for the smaller short studs such as gearbox side.

[goldeneye]

I insert studs by the "double nut" method, and only use the stud extractor on stubborn or broken studs, with a bit of heat around the alloy it goes in, and only on the plain shank of the stud, never the thread. mines a concentric roller type (I think that's the name) with two sizes on it , small and a bit bigger! had it for years and its never let me down. just used it today in fact .

[hendy]

This works great for me
http://www.lasertools.co.uk/item.aspx?c ... &item=3832

[Speed Demon]

For cylinder studs the cam type works fine for me and they are cheap.



http://www.mpdirect.co.uk/p/26692/seale ... AmVl8P8HAQ

The socket-type only grip specific stud sizes and if the studs have rolled threads then the shank can be undersized and they don't grip properly. They will grip studs with cut threads but these are less common.

[dave411]

This works great for me
http://www.lasertools.co.uk/item.aspx?c ... &item=3832

I have one of these.Works a treat.

[Daggs]

Thanks for the input guys. I've returned the 'concentric roller' type that i bought. I think 'Speed Demon' explains the reason they were useless.
I didn't explain properly in my opening post. I am looking for a tool to drive studs in and out, to save the time and effort of 'double-nutting' Rather than a tool that would extract a stubborn or broken stud.
I think i'll invent my own.................

[warts]

I find a 3/8" drive to 1/4" hex that fits in a cordless drill makes the double nutting method cheap and easy. Without the drawbacks of the other two types.
(the cam type can put stress raisers into the studs if they are tight).