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Chain hoist ID? (Differential)

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  • #1

    Chain hoist ID? (Differential)

    I have a 1/2 ton differential hoist that has no manufacturer name visible, although there is a logo stamped on the hooks.

    I'll have to describe or get a pic of the logo..... later when I'm home.

    But the pulley frames have the model number on them, which appears to be "414M 1/2 ton".

    Another clue is that the hooks have a nut holding them, that is tack welded over to secure. The lower hook has a ball (roller?) bearing under the nut as a swivel.

    Y&T put their name on the frames...I have a similar Y&T 1/2 ton, with a shorter chain loop. They used a different type of hook retainer, and no bearing.

    I am pretty sure it's not a cheesy chinese one, it looks solid, is known to be older, just not chinese-looking. I don't think they made any differential hoists anyhow, they make mostly "pull-chain" hoists.
    CNC machines only go through the motions.

    Ideas expressed may be mine, or from anyone else in the universe.
    Not responsible for clerical errors. Or those made by lay people either.
    Number formats and units may be chosen at random depending on what day it is.
    I reserve the right to use a number system with any integer base without prior notice.
    Generalizations are understood to be "often" true, but not true in every case.
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  • #2
    OK, the logo is "A C" and below that, a large "C" with a "D" or a crummy-looking "O" inside it.

    Can't get a decent pic of it, it is just stamped/forged into the hook.

    The ID isn'r critical, I jusat was trying to see if it is from a decent maker, so I know more about how I might de-rate it, and if I ought to (Chinese derate is 2:1 maybe 3:1 out of the box, old US is just based on visible wear.)

    [This message has been edited by J Tiers (edited 08-11-2005).]
    CNC machines only go through the motions.

    Ideas expressed may be mine, or from anyone else in the universe.
    Not responsible for clerical errors. Or those made by lay people either.
    Number formats and units may be chosen at random depending on what day it is.
    I reserve the right to use a number system with any integer base without prior notice.
    Generalizations are understood to be "often" true, but not true in every case.

    Comment

    • #3
      Could the logo be ACCO?

      If I remember that is/was American Chain & Cable Company. If so it is a good hoist.
      Jim H.

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      • #4
        It surely could, probably is. Thank you.
        CNC machines only go through the motions.

        Ideas expressed may be mine, or from anyone else in the universe.
        Not responsible for clerical errors. Or those made by lay people either.
        Number formats and units may be chosen at random depending on what day it is.
        I reserve the right to use a number system with any integer base without prior notice.
        Generalizations are understood to be "often" true, but not true in every case.

        Comment

        • #5
          J,
          I have used those older differential hoists many years ago and I don't think you need to derate yours, if it is in good condition. They are "geared" such that it is pretty hard to physically pull hard enough to overload them. All of the ones I have used were made about the same. Two of us would pull on one at the same time, sometimes sticking screwdrivers through the chain for a better grip. Probably unwise but we knew the approximate weight we were lifting and it was less than the hoist's rating.

          Rick

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          • #6
            Any older US one should be made so that the lower hook will open before any other failure occurs.

            I have seen them with hooks so open that nothing can be actually lifted anymore. That takes, IIRC, something like a 6x overload.

            You are correct, no de-rating except for chain wear, which is minimal to none in this case. And teh hook has not spread noticeably. It's likely good to go for the full 1000lb.

            Thanks

            CNC machines only go through the motions.

            Ideas expressed may be mine, or from anyone else in the universe.
            Not responsible for clerical errors. Or those made by lay people either.
            Number formats and units may be chosen at random depending on what day it is.
            I reserve the right to use a number system with any integer base without prior notice.
            Generalizations are understood to be "often" true, but not true in every case.

            Comment

            • #7
              The hooks often spread open not from overloading the hoist but from improper use. A co-worker opened up a hook on a ratcheting hoist of mine by placing the hook over a tractor drawbar and attempting to pull a 3 point hitch down. The pressure was on the tip of the hook, the hook was then in a position to be spread by the force. Things like this were badly abused in the farm repair industry at one time.

              Rick

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