MTFCA Forum

Can aluminum be used to make adapters. I have some aluminum slugs that are 8 inches in diameter and 5 inches thick.. If I make adapters out of them, how thick should they be?

5 inch thick should do it just fine... you may want to start advertising for some wide track fenders to go with em tho...

most of the adapters/spacers used on 4x4's are made from aluminium (I'm in Scotland thats how we spell it ) im sure it would be fine for a model T

Typically Dennis the commonly available adapters are a minimum 1" thick. But consider the fact they use a standard lug nut that has to be recessed to just below the surface.

You didn't say what exactly your doing, but even if you could thin it down some more, I don't think I's go no less than 3/4" thick. Typically you want the fastener to be at least as deep into the material as its diameter. Example, A 1/2" screw should have a 1/2" of thread engagement minimum.

But you need at least 3/4" on a wood wheel hub to a wire wheel for clearance. Just Sayin', been there.

Hank

Not to rain on the parade, but if you are going to mount Model A wheels, to get at least two points of support you should use these;
https://www.speedwaymotors.com/Speedway ... UeEALw_wcB
The stud holes for the Model A wheel were never meant to be used as a contact spot only to keep the wheel centered and on the car. In fact, a properly mounted A wheel, the area under the stud holes would not even come in contact or would have very little contact with the A brake drum.
The Model T wire wheel was a little different. The outer diameter of the hub was part of the support of the inside of the wheels hub area.

Every one is correct here, so keep in mind the thicker they are the more strain you willl put on the bearings & axle. Happy machining.