Has anyone used these or similar jaws for revers turning

I've not used Cole jaws like those, but I've used a Longworth chuck that follows a similar principal of holding the rim of the bowl. I also got whacked in the head by a bowl that came out of the Longworth chuck. Personally, I shy away from that type of jaws now that I've learned some other ways to finish my bowl bottoms (friction chuck or vacuum chuck), but there are a lot of turners who use Cole jaws and like them. (I wish I was in LA so I could show you a few ways I do it.)

I don't remember what type of chuck you have. If it's not a Vicmark chuck, I'm not sure if these jaws would fit.
 
Vacuum chuck. It'll make the donut obsolete.
Unless there are voids in the bottom of the piece, or the wood is too porous or warped. (I've had ash and mesquite pieces that wouldn't stay in my vacuum chuck.) Since I usually don't do anything very fancy on the bottoms of my bowls and hollow forms, more often than not I just use a simple friction chuck (a rough-turned bowl) and the tailstock to finish things off. In some cases I also add some plastic stretch wrap as insurance. When I get back to my shop I'd be glad to show Mohammad how I do it in person.
 

Attachments

  • Stretch Wrap Chuck 02 - 800.jpg
    Stretch Wrap Chuck 02 - 800.jpg
    78.5 KB · Views: 14
  • Stretch Wrap Chuck 03 - 800.jpg
    Stretch Wrap Chuck 03 - 800.jpg
    134.3 KB · Views: 16
  • Stretch Wrap Chuck 05 - 800.jpg
    Stretch Wrap Chuck 05 - 800.jpg
    128.6 KB · Views: 16
  • Stretch Wrap Chuck 06 - 800.jpg
    Stretch Wrap Chuck 06 - 800.jpg
    122.7 KB · Views: 14
  • Stretch Wrap Chuck 09 - 800.jpg
    Stretch Wrap Chuck 09 - 800.jpg
    102.5 KB · Views: 13
  • Stretch Wrap Chuck 10 - 800.jpg
    Stretch Wrap Chuck 10 - 800.jpg
    49.6 KB · Views: 13
  • Stretch Wrap Chuck 12 - 800.jpg
    Stretch Wrap Chuck 12 - 800.jpg
    55.5 KB · Views: 13
  • Stretch Wrap Chuck 13 - 800.jpg
    Stretch Wrap Chuck 13 - 800.jpg
    65.9 KB · Views: 14
  • Stretch Wrap Chuck 14 - 800.jpg
    Stretch Wrap Chuck 14 - 800.jpg
    91.6 KB · Views: 13
Top