Featured Technical redrilling 5 on 5.5 to 5 on 4.

I''d of tig welded the holes shut and drilled the 5.5 pattern if that's what's on the back.

 

Why? Hubs are plentiful vs those wheels purposely drilled for a smaller market.

 

I borrowed a friends table of that size once [it was enough] went and bought the eight incher

 

I had to add a new lug pattern to some rear axles, but my smaller mill but does not have a turret capability.
I used the mill to create a template out of 1/2" aluminum plate with drill bushings that registered on the axle hubs.
*Then* I applied the drill press.
I think I got things positioned within 0.002" or so.

 

Might shake like a dog poopin razor blades

 

Went together pretty smooth. I'll have installed back on Spindles soon and check runout with a Dial Indicator.
If I did again, I'd have used 7/16 studs instead of 1/2.

 

I wouldn't even worry about runout if it passes the eyeball test. The tire will compensate for a lot.

 

Ensuring hub is chucked up true in the lathe, which took more time than turning it down to be "Hub Centric", is very important. That and double-checking center punch holes are evenly spaced on a 4" circle.

Anyone notice the "screw-in" bearing dust caps, I think 1940 only.... to go with my 1937 V-8 60 Ford tube axle.

I was most worried about how thick the casting is (red arrow), and if the treaded holes would break through. Not if I can drill and tap a straight hole. This is why I chose threaded not press in studs

 

How did you locate center of the hub to make a 4 inch BP?

I’ve an idea, but would like to know what you did to think on it as well.

 

Know I see it!

 

Nice careful, thoughtful work; beautiful results with the gear you have.
Hub centric is the way to go. Hadn't paid much attention to it until I owned a series of BMWs. Reflecting back on my old 70's car with unilug American daisy mags that were non hub centric. Not good at all.
My current 60's car has hub centric spacers with an inboard recess that fits the axle/hub and an outboard lip machined to be hub centric on the wheel. Peace of mind is invaluable.