Has anyone ever made a 6 bolt to 8 bolt adaptor?

I have seen some guys make a 6 bolt to 9 bolt adaptor for the rear wheels on a WC.   I tried drawing it out on a piece of paper and I don't think it will work, but has anyone ever tried to make a 6 bolt to 8 bolt adapter, so one could use AC 8 bolt rims or wheels with 8 bolt power adjust centers on a WC?   The problem I see is 6 bolt means 60 degrees apart, 8 bolt is 45 degrees, so two bolt holes on the 8 would line up with two bolt holes on the 6, and if you offset two bolt holes on the 8, the max you can offset is 7.5 degrees, which is half the difference between 60 and 45 degrees or the other two bolt holes will get too close to the other holes.   And the WD bolt holes are 8" apart and the WC bolt holes are a hair closer at around 6 7/8".   I just thought it would be neat to fab up a set.   That way if I make a set of wheels for a pulling tractor, with the adapters, I could use them on a WC, and without them they would work on anything else that has the 8 bolt pattern.   Was wondering if anyone else has ever tried it with any success or failure?  

I hear ya Chuck. I always wanted to be able to swap C, CA, and WD WHEELS!

I made adapters to go from 6 bolt to the 9 bolt pattern to use on my WC.  I put the patern in in a manuel milling machine, I just found center and knew that my 6 and 9 bolt patterns on certain diameters and was able to figure out all my X and Y  positions.

What if you make the adapter with studs coming out toward the wheel and tapped holed toward the tractor or vise versa, It would require machining to make but I think it would work.

I think Gerald is right in that it just wont' work.   The bolt holes are too close together to make it work properly.   I think the 9 hole pattern must be much larger diameter and with the 9 bolt vs. 8 bolt spacing being further apart that probably helps as well.   I guess the only way that I could make a wheel center work on both is to make a two piece wheel center with the inner part made seperately and removable, and then I could make a wheel center with a 6 bolt pattern and then make a wheel center with an 8 bolt pattern and then interchange them if I wanted to switch these tires from a WC to say a WD45.

Maybe the easiest(?) way is to sacrifice a pair of 8 bolt rims, cut out the center section, maybe 10" in diameter, and weld in a disk with the correct 6 bolt pattern.You wouldn't be able to swap between tractors though..

Did things like this when I worked in Ford research for Torque Meters  to adapt to different makes and models of cars and truck. I made two piece adapters the inside piece mounted to the hub with the lugnuts in counter bored holes, the outer adapter bolted to the inner adapter with counter bores and annen head bolts and the wheel bolted to the outer adapter. The two piece adapter had pilots to the hub, to each other, and to the wheel. The adapter were about $500.00 each but were cheaper than the $25,000.00 torque meters. David     www.djstractorparts.intuitwebsites.com

I have made plenty of adapters in the Navy, (I am an HT) and we always use the old pencil and paper and a targeting deck, and draw to scale, we make miniature (parts) to scale to reflect the full sized part. it is challenging but once you figure out your X and Y variables, the rest comes naturally, if you look up Navy HT rating manual, theres a ton of information that would help you, as well as ANY farmer out there. Especially if you just like doing things yourself, it is Unclassified, so you should be able to google it, I invite anyone to look at the manual and tell me there isnt something in it that you didnt already know! LOL!