Home American Brand Padlocks (620) Nicholas Harkey’s American Lock Question

(620) Nicholas Harkey’s American Lock Question


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My vises are made by Panavise, a U.S. Company.  The one with the wide jaws is the model 350.  The smaller one is the model 301. Both have the 312 Base mount – www.panavise.com



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  6. Some locks do not turn when you only cut one side. I've had to cut some locks on both sides in order to remove a chain or hasp.

    On second thought, maybe I cut the "dead" side and not the side that is actively engaged by the locking bar inside.

  7. Tolerance at play again 😀

    The space that is cutout in the shackle leaves lots of room for it to twist. If it was a divot in the shackle instead of a big cutout and the ball bearing matched it, then the shackle would not rotate.

  8. The twist (after cutting) isn't part of the locks design, otherwise they might use bars instead of bearings, because bearings only engage with a small surface area so you get some movement, or a bit of compression that allows it (like when using shims).
    Hexaganol shackles would more than likely act the same way but they have a hexagonal slot rather than round so that might eliminate the twist, but could be forced.
    That's my amateur interpretation of it :)

  9. I figured it would turn….at least have some degree of play in it. But I also know some padlocks will NOT turn if the shackle is cut. Guess which ones/type?!?

  10. Congrats for doing a real test. It good to see others take product testing into there own hands and find out results in real world applications and not just rely on lab type controled enviorment tests. Good for you Bill!

  11. Of course you could have used a dremel tool with a cut off wheel but you were going for dramatic effect right? Why would anyone attack the padlock when the chain would be easier to cut though LOL

  12. Bill, you just acted in concert, for criminal conspiracy for them to steal my chain locked crotch rocket . . . Lmao . .. .just checked, its still in the garage 😉 ????????????

  13. This is the case with most ball bearing based padlocks, the one advantage of a well made bolt padlock is the lesser movement when the shackle is cut. But lock manufacturers do not really consider this, pick resistance and shim resistance is paramount as cutting the shackle is tamper evident, other methods are not. Also, use a thin cut disk next time Bill, that big disk is a waste of time.

  14. I think that if you cut the shackle at its apex, you could rotate each half away from the other and that would double the gap for a chain link to pass through.

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