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  • Gear cutting Machines

    Here's what I used to work on when gainfully employed for over 30 years.

    When I worked on the assembly floor bringing machines to life, in other words starting up a machine that had been finish assembled and ready to do it's job. You wold go down a list of instructions to check everything out, check that it was with in specs and make sure the oiling system worked and so forth. I worked on the smallest gear cutting machine made at that time. It was called a 102 gear generator. There where two kinds. Once cut straight bevel gears and the other could cut a generated gear, such as goes into the rear end of a car. These small gear cutting machines were originally designed to cut the gears on the Singer Sewing Machines. A later model cut hypoid gears such as the picture below.

    This was a gear made for some JA (Junior Achievement) project. Two of these tiny ring gears were glued on ends of pieces of wood that had a coil spring in the center to hold envelops. I still have the one gear. The diameter of this gear is 13/16" Dia.


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    Here's a comparison with some known objects.

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    Here's a link to a machine seller that shows some of the machines produced by the company I worked for. I pretty much have run all those machines at least once during my employment.

    https://www.machinetools.com/en/for-...ear-generators

    I'd love to get a desk top Barber Coleman such as this one to hob helical gears like those that were used on the original Hobbytown drives.


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    So much for a lesson on gear cutting machines.

    Bernd
    New York, Vermont & Northern Rwy. - Route of the Black Diamonds

  • #2
    It is amazing what you guys do. I posted a comment here; https://railroad-line.com/node/965887 about you machinist types. I is a craft and knowledge above all.


    Louis
    Pacific Northwest Logging in the East Coast

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    • #3
      Originally posted by desertdrover View Post
      It is amazing what you guys do. I posted a comment here; https://railroad-line.com/node/965887 about you machinist types. I is a craft and knowledge above all.
      I saw that post. It's second nature to us that worked on machines as a career.

      Bernd
      New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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      • #4
        Watching machinists work is fascinating. Every once in a while, for a change of pace, I'll watch a YouTube videos where a machinist is making something.

        George
        The sky is not my limit, it's my playground.

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        • #5
          Bernd,

          now that is VERY cool !! thanks for sharing !

          Joe

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          • #6
            What is the price of a machine like that? A person could make some bucks fixing Bachman's failures. How small can ya go?

            Philip

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            • Philip
              Philip commented
              Editing a comment
              Holy moley 50K!~ We'll need many broken trains!

          • #7
            Just add 3 phase power and your ready to go. It looks like its wired for 208 single phase so you might get away with a 240 /208 /220 transformer. Otherwise swap the motor for 240 1750.
            Used Small Barber Colman Gear Hobbing Machine. This hobbing machine was removed from service from the estate of a scale model builder, and has been in storage for approx. We can load on your truck or trailer.
            Last edited by GeeTee; 09-30-2021, 03:22 PM.

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            • Philip
              Philip commented
              Editing a comment
              Priced right. Thanks for sharing that!

          • #8
            Philip, they are not cheap, plus transporting them from another state could be costly. I could do it with the one GeeTee mentioned. I've got a trailer with a 10,000lb loading capacity.

            GeeTee, I saw that one. There's one thing many don't know about what is needed to figure out the gearing that needs to be changed to make the hob run in time with the work piece to give you the proper gear geometry. It takes a engineer and all sorts of math to get the final result.

            I would jump at owning the hobber but have to many irond in the fire now and I'm not getting any younger.

            Bernd
            New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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            • #9
              I know Bernd, What is the process of making these tiny little screws? Stamped?
              https://model-motorcars.myshopify.co...parts-hardware

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              • #10
                Originally posted by Philip View Post
                I know Bernd, What is the process of making these tiny little screws? Stamped?
                https://model-motorcars.myshopify.co...parts-hardware
                Philip,

                They are made on an automatic screw machine. Do a search on "screw machines" to see what these can do and how.

                Bernd
                New York, Vermont & Northern Rwy. - Route of the Black Diamonds

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