The Shop > Tools

Air powered Draw Bolt

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John Hill:
I no idea what you chaps are talking about, the last powered drawbar I had anything to do with was hanging out the back of a Lanz Bulldog. :med:

Darren:
Thanks guys, sorry to make you all run ragged but I'd pretty much seen all of those links.... :(

You have my gratitude all the same tho, nice to have friends..... :clap:

What I was really looking for was if someone here had built one and perhaps get a thread going....AND like I always try to do before committing myself to anything is to see if I can weed out all the options. This often helps to prevent me or anyone else following the wrong path.

But I think that guy who sells the plans has it pretty well sussed, seems like it.

The parts are cheap, very cheap, so I was thinking of having a go for the Beaver mill at some point. After I get it up and running of course..... :)

The idea of smacking the draw bolt to release the collet really goes against my idea of machinery care. lets be honest, sometimes you have to give it a pretty good belt.... :bang:

To me the quick change is the second benefit, not the first.....

bogstandard:
Darren,

Just to add a little to this discussion, has anyone ever used a powered drawbar with a morse taper fitting?

Out of pure experience, MT's can be a real PITA to release. Thank goodness I now use R8, which come apart just by farting in their general direction.

What I can't see, is how a power drawbar can release such a nasty monster as a stuck MT taper. Surely they don't have the same clout as a big heavy hammer, which can and usually is the normal method of release. Or is it the continuous knocking feature of the wrench that knocks the joint apart?

Also, what happens if you get one that is REALLY stuck. Do you have to strip all the stuff off the top so you can get a mini sledge hammer in there? Or again, will this never happen because of the torque setting of the wrench?

Bogs

Darren:
Well I think I have a pretty good idea how it would help with the barstewards known as MT tapers  :lol:

But there are plenty of engineering types on here so maybe it's about time someone else actually spoke up....

Come on lads....this IS a forum after all....a place to chat, mull and exchange ideas away from the toils of our normal lives....oh and 'er indoors.... :lol:

John Stevenson:
My Beaver has a powered drawbar, air over hydraulic, no stupid air wrench.

John S.

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