8 lug wheel lug bolt diameter
 

Does anyone know how to reach Chief 8 lug? I am in desperate need of knowing what the precise diameter of the 8 lug bolt circle. Correct info would be most appreciated.

You could try Larry at Z&L Machining at 815-735-4002

top or bottom

Lug bolt diameter or bolt circle? The bolt circle is 5 x 5, the bolts are the same 1/2"-20 as any other regular Pontiac wheel. According to the information on Fred Teufert's site the knurled part of the bolt is 0.600" but I'm not exactly sure what that dimension means, if it's the outside diameter of the knurled part or what. http://www.teufert.net/pontiac/8lug/8lug.htm

It's the outside of the knurled, just checked the blueprint

He wants the diameter of the 8 bolt circle!Tom

center of bolt hole across to center of bolt hole 10-1/4/" Chief 8 lug seems to have left the reservation, No web site and phone disconnected. he farmed everything out to j&G relining or larry anyway whatcha trying to do?

8-lug bolt diameter
 

I am making a set of custom 3 piece aluminum wheels. This dimension is the only dimension I am unsure of. I have the wheel halves, the aluminum plate, a cnc machinest and eguipment, the engineering drawings. This dimension is all I need to start the machining..

8 lug bolt cirle diameter
 

Is this dimension exactly 10.25 inches? This has to be exact. Thank you for any help. I do appreciate it. I will post pictures when the wheels are completed.
Larry

Larry, I would love to see some photos!! Thanks..

Why not just have an original wheel digitally scanned?

Some years ago I bought a local 61 Ventura and it came with a set of billet alu 8 lug rims.Sold them to a friend in NY,no clue if he ever used them.Tom

8 lug circle diameter
 

Thanks everyone. I will post pictures when they are completed. It is my understanding that digitally scanning is not exact. Close, but not exact. I wish I could find someone who had the factory blueprint dimension. I'm a little nervous about spending big dollars to scrap parts on a trial and error basis. Well, onward and upward. Take care.
Larry

Seems like it would be reasonable to figure this out by measuring the bolt circle on a drum. Maybe no real difference. Just a thought.