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Studs for lug nuts

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James

12-02-2002 18:25:26




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My tractor(originally with lug bolts instead of lug nuts) has had the lug bolts broken off in the hub. Someone then drilled them out and tapped the hub to 9/16 NC. No one makes course threaded lug bolts, so I would like to install studs in the hub and convert to using lug nuts instead of lug bolts.

Can I just drill the hub out and hammer/press the studs in? Or do the hub holes need to be ribbed like the studs in order to accept them?

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Gordon in IN

12-04-2002 16:13:23




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 Re: Studs for lug nuts in reply to James, 12-02-2002 18:25:26  
If 9/16 NF threaded lug nuts are suitable, size and taper to fit the wheel mounting holes; and if the existing hub holes are properly located for the wheels and have good 9/16 NC threads, just install 9/16 threaded studs. Use grade 8 studs that are the proper length and with coarse threads to go into the hub and fine threads on the other end for the lug nuts. (These type of studs are common for use in castings on engines, such as cylinder head studs and manifold studs.) Use loctite on the hub threads and anti-seize compound on the fine threads for the lug nuts. If the threads in the hub are located properly but the threads are less than perfect, you can install studs with slightly longer coarse threads and add a coarse threaded nut on the back side of the hub. Again use loctite on these "backing" nuts. I have done this a number of times and have had no trouble. Good luck, Gordon

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Farmered

12-03-2002 05:55:33




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 Re: Studs for lug nuts in reply to James, 12-02-2002 18:25:26  
James, You probably can find studs that will press in without drilling out the threads. The ribs on the stud will mash right into the threads.
You can use a nut on the stud to pull it in if you don't have a suitable press. Ed



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ger

12-02-2002 19:47:44




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 Re: Studs for lug nuts in reply to James, 12-02-2002 18:25:26  
on an trailer i saw them doin that an they welded them so they wouldn,t spin when you tightened them up



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paul

12-02-2002 20:09:09




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 Re: Re: Studs for lug nuts in reply to ger , 12-02-2002 19:47:44  
I wouldn't want to heat them up & mess up their hardness like that. The bolt splines should tap (with a hammer, not a tap & die) into the holes, if you drill with the proper sized bit..

--->Paul



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ger

12-02-2002 20:12:42




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 Re: Re: Re: Studs for lug nuts in reply to paul, 12-02-2002 20:09:09  
ya thats something to be awareof these ones had the splines stripped out an they just tacked one or two to hold it while they tightened it up , old hay wagon an a quick fix , i guess



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Slowpoke

12-03-2002 01:10:55




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 Re: Re: Re: Re: Studs for lug nuts in reply to ger , 12-02-2002 20:12:42  
I bought a factory made 8x18 tilt trailer, one axle,probably late fifties, from a farmer who moved to town. Had decent 7.00x16 radial tires. I hauled several WD45's and a superA IHC at speeds under 50 mph. On the last trip 1 tire went flat as I backed in to unload. Inside was a non-radial low speed mine tube. Two weeks later, I found the tread on the other tire had removed itself from the casing while parked. Inside was a non-radial low speed mine tube. (The wheels are split rim type.) Since both wheels were off,I decided to replace all the bearings. I found 2 different size studs on each hub, and a couple of grade 5 bolts welded in, in place of grade 8 studs. Some of the original studs were welded and had broken the welds. One of the rims had elongated mounting holes.
After pressing out all the studs,I matched a "good" one at an 'old time' auto supply and got a slightly larger spline diameter ,then redrilled the hub holes about 2-3/1000 over the new spline groove diameter.I pressed them in with a little oil and it looks like a tight fit. I haven't put them on the axle yet, so I don't know if it's the correct procedure. You might try contacting Century Wheel for more info. I think they are in LA.

.

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Rich

12-04-2002 12:26:38




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 Re: Re: Re: Re: Re: Studs for lug nuts in reply to Slowpoke, 12-03-2002 01:10:55  
I had a similar problem on a two axle utility trailer. It had two different axles and therefore two different bolt patterns. I took all four hubs to my machinist(My b-i-l) and had them drilled for a chevy truck pattern. Got four wheels from the auto recyclers(wrecking yard) and installed all new studs. Now I can use the spare from my pickup should the need arise.

Rich



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Ray,IN

12-02-2002 18:49:55




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 Re: Studs for lug nuts in reply to James, 12-02-2002 18:25:26  
The holes are smooth, and the splined stud bolts press into them, insuring a tight interference fit. The bolts and tapered nuts are what locates the wheel on center, so accuracy is needed for hole placement. If you're not familiar with machine shop procedures I'd recommend hireing the work done at a quality machine shop.



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