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Thread: Lorch LAS Lathe

  1. #16
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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

  2. #17
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    Quote Originally Posted by Stustoys View Post
    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.

    Quote Originally Posted by Stustoys View Post
    How about a strip of Alum and an small pair of vice grips/slide hammer. With some heat in case there is some locking compound. It wouldnt be a super tight fit would it?

    Ok something just dawned on me.

    http://www.woodworkforums.com/attach...e-img_1044.jpg

    I've seen these collets before. (ring collets or thin work collets or some such)
    The top row are fine, they work like any other collet.
    How does the second row work?

    Stuart
    No idea, as you would lose some working length each step down?

    Quote Originally Posted by nearnexus View Post
    Looks like the spindle has to come out and the bearing pressed on in situ.

    Just use a big "G" clamp

    Rob
    Damn!, my thoughts exactly, I was hoping for anther take on the situation.

  3. #18
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    Well yes a press fit, but there are press fits and then there are PRESS fits lol

    Quote Originally Posted by Brobdingnagian View Post
    No idea, as you would lose some working length each step down?
    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
    Attached Images Attached Images

  4. #19
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    Ueee is offline Blacksmith, Cabinetmaker, Machinist, Messmaker
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    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
    1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.

  5. #20
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    Quote Originally Posted by Stustoys View Post
    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
    Ok i google for "step chuck" and one of the top results i get is:


    lols, thanks stuart.

  6. #21
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    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.


    708009846_o.jpg708009985_o.jpg708010038_o.jpg708010046_o.jpg708010053_o.jpg708010058_o.jpg708010065_o.jpg708010071_o.jpg708010077_o.jpg708010085_o.jpg708010090_o.jpg708009981_o.jpg708009972_o.jpg708009855_o.jpg708009865_o.jpg708009877_o.jpg708009890_o.jpg708009895_o.jpg708009918_o.jpg708009924_o.jpg708009947_o.jpg708009957_o.jpg708009965_o.jpg708010114_o.jpg

  7. #22
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    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

  8. #23
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    Quote Originally Posted by Michael G View Post
    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
    Please do if its not too much trouble

    -Josh

  9. #24
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    Quote Originally Posted by Brobdingnagian View Post
    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.

    I guess someone offered enough, I thought it might have stayed up on ebay a little longer.

    Heat and a pair of vice grips won the day, thanks guys.

    -Josh

  10. #25
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    Quote Originally Posted by Brobdingnagian View Post
    Please do if its not too much trouble

    -Josh
    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



  11. #26
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    Peter got there first, but IMG_0043.JPGIMG_0044.JPGIMG_0045.JPG

  12. #27
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    Thank you gentleman.

    Stuart

    They need a "thank you" thingy like the "like" thingy.

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