Are we sure its not just held on with locking compound?
Its not like it could go far even if it was loose.(though granted that would be a little rough ;) )
Stuart
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Are we sure its not just held on with locking compound?
Its not like it could go far even if it was loose.(though granted that would be a little rough ;) )
Stuart
Maybe it is, it seem to be on there pretty solid, but I would guess at a press fit, being high end german product.
No idea, as you would lose some working length each step down?
Damn!, my thoughts exactly, I was hoping for anther take on the situation.
Well yes a press fit, but there are press fits and then there are PRESS fits lol
What I was thinking was. They have to be for holding the inside of something right? So that would mean the collet needed to move out to clamp the work, unlike "normal" collets that move in to clamp. So how does tightening the draw bar move a collet out?
Ok I've done some googling, they seem to be call ring or step chucks.
Looking at this picture it would seem there must be either second part or use the spindle nose to supply the external taper to "open" the collect to close it ;)
Stuart
I would imagine they work like a small hole gauge, the threads are continued onto a shaft that flares out at the end. When the db is tightened up it pulls the collet into the seat and then starts to draw the flared bit into a matching taper expanding the rings......could be way off though!
Ew
Ok i google for "step chuck" and one of the top results i get is:
http://www.youtube.com/watch?v=5T9FVgM1tn8
lols, thanks stuart.
For those people that are interested here is current listing for a Lorch LAS atm. I'm sure the seller won't mind if I post their photos here. This one seem much more complete than my brothers but it also more than he paid. But it is nice to see one with most of the accessories for comparison.
Attachment 289587Attachment 289600Attachment 289601Attachment 289602Attachment 289603Attachment 289604Attachment 289605Attachment 289606Attachment 289607Attachment 289608Attachment 289609Attachment 289599Attachment 289598Attachment 289588Attachment 289589Attachment 289590Attachment 289591Attachment 289592Attachment 289593Attachment 289594Attachment 289595Attachment 289596Attachment 289597Attachment 289610
We have a Weiler at work with these step chucks (funnily enough, I had to tell the fitters how they were used - don't seem to cover much of this manual milling stuff in trades school any more)
The hollow ones work like a normal 5C but the external ones have a conical sleeve that they pull against that spreads the cone. I can get a photo tomorrow if there is interest.
Michael
Josh,
probably the same principle as my 6 & 8mm watch lathes...
Draw-bar pulls them over a taper, and opens them up.
I use this one often, especially to make bevelled wedding rings (like the platinum one from last week, in the 3rd picture below)
Regards,
Peter
http://www.petermcbride.com/temp/images/lorch_step.jpg
http://www.petermcbride.com/collection/lathe1.jpghttp://www.petermcbride.com/temp/images/damienmc03.jpg
Peter got there first, but Attachment 289750Attachment 289751Attachment 289752
Thank you gentleman.
Stuart
They need a "thank you" thingy like the "like" thingy.