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Old 12-20-2019, 05:48 AM   #1
xelhan
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Default Steering box sector spline


Does someone know what size tapered spline the 1933-34 steering box sector shaft has got?

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Old 12-20-2019, 07:26 AM   #2
PeteVS
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Default Re: Steering box sector spline

I think that the spline remained pretty constant from '32 through '48 at least. The only thing that varied was the "blocker teeth" which force you to install the pitman arm in one position and that can be gotten around.
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Old 12-20-2019, 09:55 AM   #3
xelhan
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Default Re: Steering box sector spline


Are they possibly 1-1/8-32 tapered spline?
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Old 12-20-2019, 11:25 AM   #4
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Default Re: Steering box sector spline


Actually 36 tooth full circle spline with 4 blocked teeth, leaving 32 teeth total
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Old 12-20-2019, 12:29 PM   #5
rotorwrench
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Default Re: Steering box sector spline

I don't think that there is a standard for it. It would be s proprietary size and pitch. A person would have to copy a nice clean example of one. I don't know if it was cut or if it was broached either. As was mentioned it does have a key section that fits into a keyway on the pitman arm to properly locate the steering on center.

Maybe someone can measure one for you but I don't have one. All the stuff I have is either Model A or Gemmer II designs.
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Old 12-20-2019, 12:40 PM   #6
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Default Re: Steering box sector spline

It is .750 taper per foot. The serrations are a 90 degree included angle.
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