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ChuckLuedtkeSEWI 
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Joined: 11 Sep 2009
Location: Jackson, WI
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 Topic: Installing lug studs on D17 rear end
Posted: 08 May 2010 at 9:50am |
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Went to one of the local farm dealers this morning and got 7 new lug studs and nuts. The other 9 are on order. These are going on to replace the stripped out lug bolt holes on the axle hubs. About half of the thread holes are stripped and the others are ok, but I am going to do it to all of them. Question is, I probably have to drill out the holes for these lug studs, and if I do, what size do I drill them out to. I got 9/16 - 18 lug studs as the lug bolts were that same size. Do I drill the holes out to 9/16 or smaller. Thanks for any help.
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Eldon (WA)
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Joined: 11 Sep 2009
Location: Spokane, WA
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Posted: 08 May 2010 at 10:17am |
I think your answer is on this chart somewhere....
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
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Posted: 08 May 2010 at 10:58am |
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You have to find out the required hole diameter for the knurled part of the stud that fits in the hole. It will be bigger than 9/16, but not as big as the peak of the knurl. Probably needs to be drilled to the nearest .001 or closer tolerance because its a bit of an interference fit. That diameter can only be guessed to be .001 or .002 smaller than the knurl, but the maker of the stud has a particular sized hole in mind. If the interference is too much it may split the hub. If its too little, the stud will come loose.
Gerald J.
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ChuckLuedtkeSEWI
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Posted: 08 May 2010 at 12:23pm |
I asked the guy at the dealership and he didn't have a clue. Took my mic and the outside of the threads measure .5540. The peaks on the knurled part measure .6105. The shoulder of the stud after the threads but before the knurled part measures .5620. A 9/16 drill bit measures .5625. I am going to drill one out at 9/16 and then try it. If that doesn't work I can go up to 37/64 which is .57813 and then 19/32 which is .59375. I will have to try the 9/16 and if it doesn't go, I'll have to go somewhere better then the local Fleet Farm's etc. as all they carry are the easy drillbits, not the odd sized ones.
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Gerald J.
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Posted: 08 May 2010 at 12:56pm |
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Jeg's web page wants the hole 9 to 2 thousandths under the knurl diameter. Like .601 to .6085" Same thing on the moroso web page: http://www.moroso.com/catalog/categorydisplay.asp?catcode=25107 It may take reaming with an adjustable reamer to get the diameter that close without being loose.
Gerald J.
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ChuckLuedtkeSEWI
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Posted: 08 May 2010 at 1:20pm |
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I mismeasured the peaks of the knurls. It is actually .6145. If I use a 39/64 drill, which is .60938, that will give me .005 which is inbetween what you have found and I found on ARP's websitie .005 if the hub is steel or cast iron.
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Gerald J.
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Posted: 08 May 2010 at 4:22pm |
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One page I saw showed countersinks on both faces but didn't relate any dimensions to any parts. I was amazed at the number of pages that didn't list a hole diameter. Then there was a forum discussion them with all kinds of bad information based on speculation from persons who didn't have any true ideas.
Gerald J.
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Eric NY
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Joined: 11 Sep 2009
Location: Perry, NY
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Posted: 08 May 2010 at 5:17pm |
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I have these wheel studs for sale at my store and the catalog states .615" diameter at the knurling and shows drill size of .594 which is 19/32" if using stud to repair the hub. Hope this helps, ERIC NY
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JC-WI
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Joined: 11 Sep 2009
Location: wisconsin
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Posted: 08 May 2010 at 5:20pm |
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When installing them, they are usually whacked in by hammer, but I was showed to never seize the threads and to apply to the surface of nut. then put spacer (washer(s)) on over threads then torque the nut till stud is seated. - might be more misinfo but it worked for me, use to use the BFH method.
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Gerald J.
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Posted: 08 May 2010 at 5:41pm |
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Pulling with a lubricated nut or pushing with a hydraulic press has a better chance of putting them in straight than applying the hammer.
Gerald J.
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