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Best gearbox style for torque?

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  • #31
    Do you have room for a Conical Spring stack for tension and an air/hydraulic release mechanism?
    If you benefit from the Dunning-Kruger Effect you may not even know it ;-)

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    • #32
      I bought a Kurt power drawbar with an air wrench for the shop years ago. It saved so much time in production work on a Bridgeport that it paid for itself in a couple months. I was having some parts made by a local shop and the guys dad did a lot of the work on the Bridgeport. I saw he had a step next to the machine because he was short and had trouble tightening the drawbar. I told him about the Kurt attachment. He actually bought one and his dad thanked me because it made the difference between him continuing to work or quiting because his shoulder could no longer take the abuse. You very quickly get a feel for how tight the tool is.

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      • #33
        Originally posted by Magicniner View Post
        Do you have room for a Conical Spring stack for tension and an air/hydraulic release mechanism?
        Will need to change to a pull-stud gripper for that, its a possibility if there is room in the spindle
        If it does'nt fit, hit it.
        https://ddmetalproducts.co.uk
        http://www.davekearley.co.uk

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        • #34
          Originally posted by A.K. Boomer View Post
          Planetary system is a beautiful thing, loads are all self centering and yes very efficient, it's the reason why a modern automatic transmission with torque converter lock-out can out-due a modern manual MPG's that's using the same thin fluid...

          I do not like worm drive, LOTS of friction there they basically operate on "scuffing" action. although there are roller worm drives that eliminate that, very pricey

          there's also duel planetary that rival the gearing ratio's of many worm drives but now your talking complexities and money also ...

          Edit; im wondering if anyone knows of a 3 speed manual transmission that has ever been in production for automobiles or even trucks that used the planetary system --- for along time i thought "why not" but now im thinking it might be hard to add synchromesh to units like this...
          Boomer: Have you forgotten about the "manual" planetary transmission that Henry Ford used for years in his Model T cars and trucks?

          Sarge41

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          • #35
            Forgotten? I never even knew about it but thanks that's exactly what im looking for to study and see how he did it, not as simple as a low rpm rear bicycle hub im thinking as those don't store any momentum in the parts to speak of, thanks Sarge very cool to check out...

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            • #36
              That's incredible ! had no idea --- this is not some crashbox with two shafts and some shifting forks,,,

              this thing is incredibly advanced for it's time... look at it bolted up to that old engine, it's like aliens intervened right where the flywheel starts...

              Way ta go Henry - thanks Sarge.

              http://www.mtfca.com/discus/messages/50893/79660.jpg

              http://modelt.ca/wp-content/uploads/...ansmission.gif

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              • #37
                Its amazing (honestly) but it won't fit on top of a Bridgeport mill

                Does anyone know of there is space inside a QC30 spindle socket for gripper fingers?
                If it does'nt fit, hit it.
                https://ddmetalproducts.co.uk
                http://www.davekearley.co.uk

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