I.D'ing aluminum timing gear

Jon B
Jon B Administrator
edited November -1 in HUDSON
I picked up an aluminum timing gear at the National Meet as a spare, hoping it would fit my car. I'm assuming (and hoping) it fits the splasher sixes from the mid-thirties to 1947 (and the eights up to 1952) but there are absolutely no markings stamped into the gear.



I already have an aluminum gear on my '37, but it has a 'wavy' web. This (unknown) gear has a flat web. Might not even be for a Hudson, I dunno...



Were there different variations on the aluminum timing gears? I do know that when replacing the fiber gears with the metal ones, one must have a mating steel crankshaft gear of the correct pitch. But I thought there might have been a difference in pitch between the fiber and the aluminum gears -- not between different versions of the aluminum gears themselves.



Anyone have any ideas on how to I.D. this gear if it doesn't have a part number?

Comments

  • Geoff
    Geoff Senior Contributor
    Does it have three holes in the centre? If so it is most likley a Huson gear. It is possible that there were after-market alloy gears supplied, but really the only way is to get the pitch of the teeth measured by an engineer.

    Geoff.
  • [Deleted User]
    [Deleted User]
    one reasonably accurate method of checking that gears match is to lay one flat on a piece of timber, hammer 3-4 (equally spaced around the circumference of thegear) nails into the pitches of the teeth, (simulating a tooth meshing from another gear) then stacking the second one on top. if a nail doesnt line up with a tooth or the 2 gears are stacked offset, its not the right gear for the job.
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