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Steppeed hubs vs non-stepped hubs

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  • Steppeed hubs vs non-stepped hubs

    Recently had to educate myself on the difference between a stepped hub and a non stepped hub.
    First some history-- I'm rebuilding a 1939 knucklhead --only one I've ever seen is Matt Olsen's Last OCtober when I surprised him and Carl while Pheasant Hunting in South Dakota.

    They showed me a stepped hub, I even took a picture of it, but the picture didn't turn out very well and I couldn't remember what I was pointing to in the picture.
    Stepped hubs were used in 1939 (not sure and don't really care to know when else they were used) Probably used in 1940 too until the supply ran out.

    Most of you reading this are experts and know this already, but for any newbies that stumble across this post, attached are pictures of a stepped vs non-stepped hub

    Enjoy,
    Jim Bodnar

    P.S. If I can convince my Dad to find his way to the 21st century and buy a digital camera, I'll post pictures of his amazing progress with this bike. I owned it for 10 years and never made a lick of progress. I delivered it to him in late March and we almost have a very nice and complete rolling chassis-- actually I shoudl say it is almost done except final paint and the motor. I still don't know what to do about the motor--matching 39 cases but everything else is mid-40s FL. Probably rebuild what I've got--with junk parts costing what they do these days, who could afford to build a small port motor from scratch? not me
    Attached Files

  • #2
    Good information and pics.

    If your dad doesn't want to get a digital you can still get pics on the computer. Take regular pics with a 35mm and then when you get the roll developed have them put it on a disc as well. Put the cd in your computer and now you can share pics with anyone. I used to do that before I had a digital camera.

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    • #3
      Was the stepped plate silver soldered or spot welded to the formed flange ? I ask because I have an old stepped hub that broke many years ago and everything is nasty and grungy so I can't tell how it was made. I have wondered if the stepped hub was weak and prone to failure.
      Eric Smith
      AMCA #886

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      • #4
        Both flanges were oven brazed to the center sleeve. They usually hold up well, but I have seen a few busted up hubs, They were brazed together all the way through at least 44. If anyone could fix your hub, it would probably be Lee Armitage.
        A.M.C.A. Board Member

        www.oldbikesinsd.blogspot.com

        www.pre1916scramble.blogspot.com

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        • #5
          [QUOTE=bodnarjw;66921]
          Stepped hubs were used in 1939 (not sure and don't really care to know when else they were used) Probably used in 1940 too until the supply ran out.

          Stepped hubs were used 1935, yes 1935-1939. They first appeared on the 1935 45".
          Be sure to visit;
          http://www.vintageamericanmotorcycles.com/main.php
          Be sure to register at the site so you can see large images.
          Also be sure to visit http://www.caimag.com/forum/

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          • #6
            A few weeks ago at a local meet I spotted a grubby lookin' 21" wheel. I asked the owner how much and he said $35.00. I paid him and picked up the grubby looking wheel with the stepped hub in it and walked away smiling. :-)
            Be sure to visit;
            http://www.vintageamericanmotorcycles.com/main.php
            Be sure to register at the site so you can see large images.
            Also be sure to visit http://www.caimag.com/forum/

            Comment

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