I looked in all the information I have but didn't find it.
I wonder what is the original transmission diameter and what is the minimum diameter that is safe to be used?

Thanks
Andre
Belgium

Seven and one half inches.

Andre: The diameter of the drums is 7.750" or 19.68cm . If you are to turn the drums a smooth surface is preferred, grinding them is preferred method.

My error ,was thinking of something else.
it is 7.500"

OT question for J and M------I have heard of a fellow building a reverse drum from steel---bad idea?--- Most of mine have cracked webs.

Thanks all

Andre
belgium

Paul.
I know of one drum that is machined out of steel, has and is still working fine for many years.

Paul:
We make them from Ductile iron so they flex rather than crack.
The material we chose is stronger than the Ford iron and it isn't 100 years old and fatigued.
I wouldn't know how the steel drum would hold up?

For example our drums ran the Montana 500 and one customer had major oil leak and drums turned brownish blue but didn't crack from heat and lack of oil.

Dave Nolting's drums are excellent. They are top-quality, and their balance is pretty near perfect. And if you have a good gear on your old drum, send it to Dave and he will install that gear on the new drum for only $25. That's a good deal.

http://www.davesrestorationandmachine.com/