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Fullreversal 10-27-2002, 08:22 PM Does anyone know various axleshaft rockwell hardness ratings? Stock, aftermarket, etc, etc. Im going to test on of my spares, but wanted to see if anyone else knew typical values. Thanks! :p :flipoff2: PIG 10-27-2002, 10:18 PM Originally posted by Fullreversal Does anyone know various axleshaft rockwell hardness ratings? Stock, aftermarket, etc, etc. Im going to test on of my spares, but wanted to see if anyone else knew typical values. Thanks! :p :flipoff2: I am not sure but I will take a guess at somewhere between 40 and 50. It is also very dependant upon what material you are talking about. I bet GOAT1 would know the answer to this so hopefully he will see it in the morning. surlynkid 10-28-2002, 05:39 AM it has been a long time since my materials class, but don't you have to specify the rockwell hardness with a letter designation first. something like "rockwell C" or "rockwell A"?? if so, a numerical value means nothing without the letter. damn, i hated that professor. John Deere Ranger 10-28-2002, 09:38 AM to the top for the AU baja team randii 10-28-2002, 11:57 AM As with most things, it depends... * If we're talking stock shafts that have been annealed and not rehardened, pretty soft, down to RC25. * OEM Carbon steel (generally induction-hardened along a partial length, with a tenth or two case depth and 55-60RC). * Induction-hardened carbon-steel aftermarket (generally induction-hardened for the entire length, with two-three tenths of case depth and 55-60 RC). * Through-hardened alloy steel (like $top-dollar$ drag-race shafts, austempered for full penetration, has about 50RC surface hardness). NOTE: All of this can vary based on the type of material and heat treatment (if treated). Everybody rolls their own a bit differently... The above numbers are all Rockwell C -- for conversion, here's a chart I have bookmarked: http://www.metal-mart.com/Guides/HardnessC_non_austentic_steel.htm If that table doesn't make sense, study up here: http://www.metal-mart.com/Dictionary/dictlist.htm As a quick metric, what I was larnt, back in skool :p is that RC20 is soft, RC45 is tough, and RC60 is hard... Metal files are around 65RC, spring steel is around RC45. Randii Fullreversal 10-28-2002, 02:41 PM well guys I took one of my stock front spare shafts (D30HP) up to campus today and tested it on the Rockwell machine..... Using Brale penetrator, 150kg load (Rockwell "C" Scale) Went off the charts.... too damn soft :eek: Then I went down to the "B" scale (1/16" ball, 100kg load): Stock shafts got about 78-80 HRB.....thats some soft stuff (Tested on both ends splines, and along the shaft in the middle.) Kicker 10-28-2002, 06:34 PM Fullreversal- Have you bought you CV parrts for your baja car yet? If so, who from?? I work at Universal Technical Services, I am the Motorsports manager. We handle the GKN Motorsports products. Fullreversal 10-28-2002, 07:46 PM kicker... check your PM | |