power draw bar - not losing fingers

Results 1 to 3 of 3

Thread: power draw bar - not losing fingers

  1. #1
    Registered
    Join Date
    Feb 2017
    Location
    United Kingdom
    Posts
    25
    Downloads
    0
    Uploads
    0

    Default power draw bar - not losing fingers

    Just got a new mill with a power draw bar (pneumatic), and I'm kind of surprised how severe the thing is.

    Is there a way to safely use these? I very nearly got my finger trapped on the 2nd go of using it. The error came from trying to use my fingers to feel where the spindle blocks needed to fit into the bt40 toolholder cut outs, pressed the button just as I was lining it up and it pulled up off square. It released fine, and went back in fine too - but is there a way to avoid losing a digit? I'm imagining holding it by the collet nut so finger are way out the way, but then is there a trick to line up the toolholder cut outs with the spindle blocks? Bending down to look seems the obvious answer, but 'm not a fan of putting my head in the machine

    Similar Threads:


  2. #2
    Gold Member Jim Dawson's Avatar
    Join Date
    Dec 2013
    Posts
    1585
    Downloads
    0
    Uploads
    0

    Default Re: power draw bar - not losing fingers

    There are 2 ways to do this. One is to position the tool holder into the spindle blocks by feel, just by pushing up hard and rotating the holder until it moves into place, then activate the PDB. The other is to just remove the blocks, shove the tool holder into place and activate the PDB. The taper will keep the tool holder from spinning in the spindle, the blocks are not really required. I have a Shizouka out in the shop with a BT40 spindle and a tool changer with no blocks, as does a friend of mine with a YCM-30, works just fine. This is pretty common.



  3. #3
    Registered
    Join Date
    Feb 2017
    Location
    United Kingdom
    Posts
    25
    Downloads
    0
    Uploads
    0

    Default Re: power draw bar - not losing fingers

    Thanks Jim, I'll look into those tips some more, very helpful thanks



Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


About CNCzone.com

    We are the largest and most active discussion forum for manufacturing industry. The site is 100% free to join and use, so join today!

Follow us on


Our Brands

power draw bar - not losing fingers
power draw bar - not losing fingers