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Thread: Vice Parallels

  1. #1
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    Default Vice Parallels

    Hi,

    I was browsing ebay the other day and seen these:

    https://www.ebay.com.au/itm/QUADRALL...T/192880892790


    Gimmick or the real deal?

    Ben

  2. #2
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    Default Vice Parallels

    I think the concept is sound. I saw online somewhere the idea of using a ball bearing between the work and the vice moving jaw during initial squaring operations where the 2 clamping faces aren't yet parallel. I've done it many times and it works well.
    This tool is really just an extension of that concept.

    Steve

  3. #3
    BobL is offline Member: Blue and white apron brigade
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    Default

    I've seen two largish magnetised nuts and a ballbearing employed in a similar way. However, the wider flats would have a bit more friction and hence holding power.

  4. #4
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    Default

    You can also use a piece of ground bar on the moving jaw or a piece of bright, you just want to reduce the contact surface area that the plain jaw face would provide.

  5. #5
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    Default

    It's hard to see $152 plus postage in that tool.

    Tune in here at 6 minutes for some other ideas: https://www.youtube.com/watch?v=tW8HNAlUXxU
    Chris

  6. #6
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    Default

    They should be called "Vice Unparallels"

  7. #7
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    Default

    You could make something similar with a ball bearing using the cone from a large drill bit (that is, use the tip to drill enough for a cone to act as a seat).
    It looks reasonable in theory but my concern would be whether there is a tendency for it to slip out the end. Steel on steel has a coefficient of friction of around 0.05 from memory, so any clamping angle over 2.8 degrees runs that risk.

    Michael

  8. #8
    BobL is offline Member: Blue and white apron brigade
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    Quote Originally Posted by Michael G View Post
    You could make something similar with a ball bearing using the cone from a large drill bit (that is, use the tip to drill enough for a cone to act as a seat).
    It looks reasonable in theory but my concern would be whether there is a tendency for it to slip out the end. Steel on steel has a coefficient of friction of around 0.05 from memory, so any clamping angle over 2.8 degrees runs that risk.
    Michael
    I thought it was a bit more but it seems like there's not a lot of agreement about what it is.
    https://hypertextbook.com/facts/2005/steel.shtml

  9. #9
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    Default

    Quote Originally Posted by jack620 View Post
    It's hard to see $152 plus postage in that tool.

    Tune in here at 6 minutes for some other ideas: https://www.youtube.com/watch?v=tW8HNAlUXxU
    You need better glasses. There would be at least 1 hour to make that, at shop rates thats $80-100, springs, material and heat treat would cover the remaining $50.

  10. #10
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    My glasses are fine. Given that they have already sold 18 units I just assumed they are using jigs or CNC to make them. So they should be fairly quick to make. I'd be surprised if it was an hour. I also figured they are heat treating them in batches, so I'm not seeing $50 there. I guess they have to cover the time to make the jigs or program the CNC. In any case, plenty of people seem willing to pay the money, so good luck to them.
    Chris

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