Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 7 of 7
  1. #1
    Join Date
    Sep 2007
    Location
    Northern Brisbania...
    Posts
    57

    Default Opposing toothed "Clutch-Plate" Nuts? (a bit like "Castle" Nuts...)

    Good Evening All,

    I'm in the process of modifying the Depth-Stop on my old Elu Mitre Saw, and as part of this endeavour I'm looking for a method of positively-engaging the rotational position of a small Shaft that is twisted around by hand.

    The best thing I can think of would employ a couple of opposing toothed Clutch-Plates - one effectively held captive by the machine, and the other mounted on the Shaft in question. Think of a couple of M12 or so "Castle" Nuts, but with radial Saw-type teeth instead of square ones. Two Springs on the Shaft would enable the engagement and disengagement of the two Nuts, but one of the Springs would have to be recessed in between the Nuts in order to push them apart when the Knob on top of the Shaft was pushed down...

    This "recessing" of one of the Springs is why the Clutch-Plates would need to have about the thickness of a Nut to them (I can drill the required recess into them myself...). As for their smallish diameter, this is because of the limited room available around the Shaft in question.

    So - is there a correct name for this particular Beast that I seek...

    Many Thanks,
    Batpig.

  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    DOG Clutch!

  3. #3
    Join Date
    Sep 2007
    Location
    Northern Brisbania...
    Posts
    57

    Default

    Dear Graham,

    That's it! (Thanks very much...)

    Now, the next question is: Has anyone seen them as a cheap "Off-the-shelf-for-slightly-more-than-the-price-of-a-couple-of-Nuts" type item?

    Blackwoods or Coventry Fasteners would probably be the best place to start I guess...

    Best Wishes,
    Batpig.

  4. #4
    Andy Mac Guest

    Default

    I don't know about the actual nut, but maybe this washer setup will allow you to lock the nut better. I have bought similar things from Coventry's Fasteners, and they GRIP!

    Cheers,

  5. #5
    Join Date
    Aug 2008
    Location
    Adelaide
    Age
    68
    Posts
    1,373

    Default

    Sounds like the type of thing found on the handles of the larger mills to keep them from flying around when the table is under power feed.

    If you don't need fine control (ie lots of engagement positions) it should be possible to make your own, a piece of round stock with a slot machined across the top as the female part and a matching part made with the bulk removed to make a corresponding ridge to mesh with the slot on the other part? That gives two engagement positions, if you machine a second slot at 90 degrees to the first that gives 4 positions - would that be enough.

  6. #6
    Join Date
    Sep 2007
    Location
    Northern Brisbania...
    Posts
    57

    Default

    Dear Andy and Gavin,

    Have taken both ideas on board. I shoud be going past Coventry Fasteners possibly tomorrow, and I'll see what they've got. If nothing suitable, I'll turn my mind to "Butchery"...

    Many Thanks,
    Batpig.

  7. #7
    Join Date
    Sep 2006
    Location
    Australind , WA
    Age
    58
    Posts
    1,277

    Default

    When I made my power feed for my mill, I made a dog clutch. I have a rotary table and a lathe so it was relatively easy. I can dig a pic out if your interested.

    Sterob

Similar Threads

  1. Difference "Galvanised" and "Primed" Steel
    By Fr_303 in forum METALWORK GENERAL
    Replies: 4
    Last Post: 22nd Jan 2008, 05:59 PM

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
  •