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Miniature Block and Tackle

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  • Miniature Block and Tackle

    The other day I was rummaging around the parts drawers in the hardware store and found some miniature pulleys (sheaves) 1 1/2" in diamter with a ball bearing center, for about four bucks apiece. They inspired this miniature block and tackle.
    Working load limit is 60 pounds because of the brass hooks I chose. I figure the rest of it is good for 220 pounds, the working load for the connecting links. It will do to hoist bicycles up to the garage rafters.
    ----------
    Try to make a living, not a killing. -- Utah Phillips
    Don't believe everything you know. -- Bumper sticker
    Everybody is ignorant, only on different subjects. -- Will Rogers
    There are lots of people who mistake their imagination for their memory. - Josh Billings
    Law of Logical Argument - Anything is possible if you don't know what you are talking about.
    Don't own anything you have to feed or paint. - Hood River Blackie

  • #2
    Those are "cute" enough for just a "work of art" demo. Wish I had a pair. What kind of hardware was it?
    ...lew...

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    • #3
      It turns out the "sheaves" are rollers for sliding doors. Google "sliding glass door rollers" to see some. The through-bolts are 1/4" diameter barrel bolts, sometimes called sex bolts. The wood is 3/8" thick cherry, the connector links are 1/8". The bars recessed into the wood cheeks and the center divider are aluminum, 1/8" thick hardware store stuff, probably 6061. I used that for ease of machining, and it's more than strong enough, 40,000 psi yield point.

      (n.b. it's not clear to me how you can have a sliding door with rollers, but that's what the listings say.)
      Last edited by SGW; 04-26-2015, 03:59 PM.
      ----------
      Try to make a living, not a killing. -- Utah Phillips
      Don't believe everything you know. -- Bumper sticker
      Everybody is ignorant, only on different subjects. -- Will Rogers
      There are lots of people who mistake their imagination for their memory. - Josh Billings
      Law of Logical Argument - Anything is possible if you don't know what you are talking about.
      Don't own anything you have to feed or paint. - Hood River Blackie

      Comment


      • #4
        Nice looking tackle. I'll have to remember the sliding door rollers.
        The rollers are on the bottom of the door.

        That's also the way I take care of my bicycles, best way ever to keep them out of the way.

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        • #5
          I have purchased pulleys from the farm type stores: Orschlen and Tractor Supply. They usually have a good assortment.
          Paul A.

          Make it fit.
          You can't win and there is a penalty for trying!

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          • #6
            Originally posted by Paul Alciatore View Post
            I have purchased pulleys from the farm type stores: Orschlen and Tractor Supply. They usually have a good assortment.
            For metal pulley blocks, a marine supply like West Marine.

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            • #7
              Nice project! I'm a big fan of what I've always called a "fence stretcher" since that's what I used them for on the farm as a kid. They are just a little bigger, maybe 1/4" to 3/8" rope, and have a cam operated lock to hold tension on the pull rope. Hold the pull rope out away from the load and release, and the lock holds, give a straight pull in line with load, to release to free wheeling function. I don't know if the locking ones are still made, might be an OSHA thing, but they work fantastic if you understand them. Maybe you could trick yours out with a similar lock!

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              • #8
                Fence stretcher? I saved one of these wire strainers when we left the farm and find it very useful especially when used with a long chain.

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                • #9
                  Now, you just need to splice some eyes in each end of the rope

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                  • #10
                    If it was laid rope, I would splice in some eyes. Splicing braided rope is beyond me.
                    ----------
                    Try to make a living, not a killing. -- Utah Phillips
                    Don't believe everything you know. -- Bumper sticker
                    Everybody is ignorant, only on different subjects. -- Will Rogers
                    There are lots of people who mistake their imagination for their memory. - Josh Billings
                    Law of Logical Argument - Anything is possible if you don't know what you are talking about.
                    Don't own anything you have to feed or paint. - Hood River Blackie

                    Comment

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