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History Another Tool ID Thread

Discussion in 'The Hokey Ass Message Board' started by Dyce, Aug 29, 2021.

  1. Dyce
    Joined: Sep 12, 2006
    Posts: 1,918

    Dyce
    Member

    I picked this up in a bunch of stuff. I think it's a piston knurlizer. I used to have a sunnen piston knurler but it had a wheel that went under the skirt for support. 20210829_163831_HDR.jpg
    20210829_163844.jpg
    20210829_163849.jpg 16302740470232479886117610043453.jpg
    The piece on the end looks like it should be flipped around.

    This one really has me stumped though!
    16302742557322873966429090273444.jpg
     
    Deuces likes this.
  2. Mr48chev
    Joined: Dec 28, 2007
    Posts: 30,027

    Mr48chev
    ALLIANCE MEMBER

    Among other things they made piston knurlers and cylinder sleeves.
    Here is a link to an old and long dead Ebay add for a sleeve catalog. Versnick Model A - Bing
     
    fauj, blowby and Deuces like this.
  3. big bird
    Joined: Feb 16, 2014
    Posts: 101

    big bird
    Member

    Okay, I'll bite. Why would you knurl a piston?
    Gizmo definitely LOOKS like it could do that, just wondering WHY?
     

  4. aircap
    Joined: Mar 10, 2011
    Posts: 1,605

    aircap
    Member

    Yes, and increase compression on worn out pistons slapping in the bores.
     
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  5. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,330

    sunbeam
    Member

    In my younger days I worked in a auto machine shop that had a PC piston knurler And used it on several sets of pistons. Then about 15 years ago I customer brought in a Ford 428 the pistons didn't have any over size markings so he thought he had a standard engine but it was .060 over with no bigger pistons available the local NAPA store had closed it's machine shop but had a old Hastings knurler left over so I bought it.The unit came with the manual it said only knurl the nonthurst side of the piston. I guess I was doing it wrong before. The engine went in a 70s F250 to pull his travel trailer and it still going today.
     
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  6. Dyce
    Joined: Sep 12, 2006
    Posts: 1,918

    Dyce
    Member

    Now that you mention it the one we had was a PC (Perfect Circle) brand. We used it a few times. We would put a heavy knurl on the piston and file each one down to fit the cylinder it went in. It worked ok if the ring lands were still in good shape and there wasn't a ridge in the block.

    I remember dad had a ridge reamers he bought in boxes from auctions but they never got used. He also had a PC ring land cutter that cut the ring grove bigger so you could put a shim in with the ring to tighten the clearance back up. People used to use things up "back in the day" and not just run out and get a new one with there credit card.
     
  7. jaracer
    Joined: Oct 4, 2008
    Posts: 1,220

    jaracer
    Member

    When I went to tech school we had a Perfect Circle piston knurler and a ring land lathe. You could cut worn ring lands and use a spacer below the ring.
     
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  8. Boneyard51
    Joined: Dec 10, 2017
    Posts: 5,171

    Boneyard51
    Member

    I just goggled “ versnisk tool” and it showed a piston knurler very similar to your tool.








    Bones
     
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  9. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,330

    sunbeam
    Member

     
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  10. Dyce
    Joined: Sep 12, 2006
    Posts: 1,918

    Dyce
    Member

    Thanks boneyard I found it. I googled versnick knurling and didn't get that because they spelled it wrong. I get it now, the angled slot is for the wrist pin. I almost scrapped it.
     
    Boneyard51 likes this.
  11. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,330

    sunbeam
    Member

    Those cone or tapered pieces are used to backup the piston skirt. These units were made before slipper skirt pistons were popular. Practice on junk pistons It is easy to break shirts on cast pistons so go easy.
     
    Boneyard51 and Dyce like this.

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