Has anyone ever made a 6 bolt to 8 bolt adaptor?
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Topic: Has anyone ever made a 6 bolt to 8 bolt adaptor?
Posted By: ChuckLuedtkeSEWI
Subject: Has anyone ever made a 6 bolt to 8 bolt adaptor?
Date Posted: 12 Mar 2011 at 5:42pm
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?
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1955 WD45 diesel 203322 was my dad's tractor, 1966 D15 23530, 1961 HD3 Crawler 1918, 1966 D17 IV 83495, 1937 WC 41255, 1962 D19 6221
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Replies:
Posted By: jaybmiller
Date Posted: 12 Mar 2011 at 5:55pm
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Anyone with autocad or similar program should be able to figure it out in a few minutes,or ,going old school, draw the rim 'bolt circles' out on two pieces of paper and see what happens.
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: captaindana
Date Posted: 12 Mar 2011 at 6:13pm
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I hear ya Chuck. I always wanted to be able to swap C, CA, and WD WHEELS!
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Posted By: Bertman
Date Posted: 13 Mar 2011 at 4:58am
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acbowser had them made for his D-15.
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Posted By: wi50
Date Posted: 13 Mar 2011 at 10:39am
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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.
If I'm not mistaken there are some available to purchase, I've seen them advertised but can't rember where
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"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
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Posted By: Gerald J.
Date Posted: 13 Mar 2011 at 4:42pm
I spent some time with Autocad trying some of those. Its really hard to get in all the bolts because holes and heads overlap unless the adapter is an inch or two thick, adding to the wheel spacing. Just about have to use recessed bolts to hole the adapter to the hub and short wheel bolts to hold the new wheel to the adapter. Just about can't be made to work with studs in the hub. Might need allen head screws for bolts to the threaded hub. Its not impossible to drill and tap along side a bolt taking out part of the bolt for a new wheel bolt hole, but it makes it hard to take the adapter off and if the bolt is hard, its hard to drill and tap a partial thread.
Gerald J.
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Posted By: Denis in MI
Date Posted: 13 Mar 2011 at 5:13pm
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.
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1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14
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Posted By: Gerald J.
Date Posted: 13 Mar 2011 at 7:17pm
To bolt to threaded holes in the adapter from the the back you'd probably have to drill out the threaded holes in the original hub. I suppose you could use smaller bolts, but usually the hub is marginal in strength already. And you are going to a stronger wheel.
Gerald J.
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Posted By: ChuckLuedtkeSEWI
Date Posted: 13 Mar 2011 at 8:34pm
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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.
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1955 WD45 diesel 203322 was my dad's tractor, 1966 D15 23530, 1961 HD3 Crawler 1918, 1966 D17 IV 83495, 1937 WC 41255, 1962 D19 6221
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Posted By: myallis
Date Posted: 13 Mar 2011 at 10:18pm
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Send "Pipe" on this forum a PM about them. His son makes and sells them to support his trap shooting. or me IO can hunt up his number
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Posted By: jaybmiller
Date Posted: 14 Mar 2011 at 7:04am
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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..
jes thinking and drinking ( coffee ) !
I tried autocad a bit, but would need the true bolt circle info, my machinist friend lives for 'challenges'....says, aw that's no problem......
jay
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Posted By: B26240
Date Posted: 14 Mar 2011 at 7:25am
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I think jay has the easiest way to make this work. I thot about doing a switch putting 28in WD wheels on a CA for mor road speed for tractor rides but have now sold CA to WP1946.
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Posted By: David(Stockbridge)MI
Date Posted: 14 Mar 2011 at 7:42am
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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 http://www.djstractorparts.intuitwebsites.com - www.djstractorparts.intuitwebsites.com
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All "NEW" Web Site http://www.djstractorparts.com
2035,A,U,UC,WF unstyled,WF styled,WC High Crop (cane),RC,B,IB,C,CA,WD,WD45,G,D10,D12,D14,D15,D15 II,D17,D19,WC styled,WC unstyled H3 crawler
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Posted By: Gerald J.
Date Posted: 14 Mar 2011 at 9:28am
Sometimes it works, sometimes it doesn't. a 5 to a 5 of a different bolt circle is a lot easier to fit than a 6 to an 8 or 9 of a slightly different bolt circle. And the axle load on a tractor rear can be a lot more than on a car tire.
According to Baum Hydraulics catalog, 6 bolt wheels are usually on a 6" circle, 8 bolt on and 8" bolt circle, and 9 on a 9-1/2" bolt circle. With pilots of 4-5/8", 6", and 7-3/4". They offer rim reinforcing rings for those dimensions that could maybe replace worn or change the centers of a rim, the 6" replacement or reinforement center is 8" OD and 1/4" thick priced at $34.34 with a 20% discount to good customers. The 8" and 9" are 5/16" thick and 8" OD, $41.69 and 46.60 each before the discount. They have one for 10 bolt rims too of 3/8" steel for $110. These would make handy tools for laying out new holes in a rim when it would be a pain to find a milling machine big enough to hold a tractor rim allowing the table to locate the holes.
Gerald J.
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Posted By: 48AC/WD
Date Posted: 14 Mar 2011 at 9:34am
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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!
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