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Gearbox clutch bearing

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  • Gearbox clutch bearing

    Old gearbox clutch bearing.


    old-clutch.jpg
    Attached Files

  • #2
    Original version of the clutch pulley and the drive disc. The bushing and pin that we know today did not exist in the early machine. Brunswick found that the bearing in the original pulley would start to stiffen as it turned...causing the inner race to turn on the hub of the clutch drive disc assembly. This would eventually wear the hub and prevent free movement of the bearing on the hub. Brunswick developed a bushing that would ride on the hub but would be kept from turning on the hub by the pin in the drive disc being in a hole in the bushing. The purpose of the hole was to keep the bushing from spinning on the hub...even if the hole starts to elongate, it still does what its original intention was...to keep the bushing from spinning on the hub. Eventually, an "improvement" came about for the bushing by adding holes so one could use a new hole if the hole started to elongate...but in reality, the added holes are not needed. If the hole elongates...it is not an issue as the bushing still will not spin on the hub.

    One thing is different on this early pulley shown above...the clutch material on this one is not the original style as the original was made from a brass/bronze material.
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    • #3
      Originally posted by Steve Stafford (JBEES) View Post

      One thing is different on this early pulley shown above...the clutch material on this one is not the original style as the original was made from a brass/bronze material.
      I happen to have 2 of those facings here on the wall. I will never use them but they are a nice nostalgic touch.

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      • #4
        Have found that rivet holes are different in those as well.
        I'm going fishing and camping!

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        • #5
          Originally posted by FreeK View Post
          I happen to have 2 of those facings here on the wall. I will never use them but they are a nice nostalgic touch.
          Got a drive disc still in use with brass. The disc has a thinner front wall to allow for another facing.

          When it finishes the shoes I'll probably retire the facings as well.
          Factory & Converted A-2 (US, Ger, Jap)
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