7 Tooth Steering Box Question

KMBeers

KMBeers

Senior Member
I’m gearing up to rebuild a 7 tooth steering box for my 29 Tudor and my question is about the size of the reamers needed for the bushings once pressed into the column for both the steering gear and the sector shaft.

Since the steering shaft is using the same thrust bearings as the king pins I am wondering if the 0.810 reamer for the king pins is right? Also I can’t find any information on the sector shaft bushing size. The Les Andrew’s book only gives the clearance, not the diameter (unless I missed something).

I am trying to have the tools on hand for when I get started on my rebuild so any help is appreciated.
 
Thanks nkaminer. I did a little digging today and noticed on Bratton’s that the sector shaft bushings need to be reamed to 1.125. The steering shaft bushings come in two sizes, A-3776-C at 0.654 and A-3776-CO in 0.615 depending if the shaft has to be turned down. Seems like an adjustable reamer is the way to go for the steering shaft work.
 
The lower steering shaft bushing might be easy to prefit to the shaft before installing it. A spiral reamer would be better to at least get the shaft close to a fit. You want minimal clearance and adjustable reamers are near impossible to get that kind of fit. There are expandable lapping tools that can be used with yellow time saver lapping compound. It's either that or take it to a machine shop and have them honed to size.
 
Rotorwrench's suggestion of yellow Timesaver is a good one. I have used this in the past to set the bearings on a Model T and it works, although it does take some time. The yellow Timesaver cuts soft material like brass but not steel.
 
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