rdfrench31 Posted February 6, 2008 Report Share Posted February 6, 2008 What's the deal with the funky threads on the bolt shroud of the 98s? How would one go about turning those threads in a lathe? I was wanting to turn myself a heat sink out of aluminum round stock, but am unsure about these threads. Link to comment Share on other sites More sharing options...
lemski4 Posted February 6, 2008 Report Share Posted February 6, 2008 It is a butress thread, and it can be turned on you're lathe. You will have to grind a tool bit for it, use steel not aluminum. Link to comment Share on other sites More sharing options...
rdfrench31 Posted February 7, 2008 Author Report Share Posted February 7, 2008 It is a butress thread, and it can be turned on you're lathe. You will have to grind a tool bit for it, use steel not aluminum. thanks lemski...wouldn't aluminum make a better heat sink since it's a better conductor? Link to comment Share on other sites More sharing options...
lemski4 Posted February 7, 2008 Report Share Posted February 7, 2008 Mine is steel and works just fine. Link to comment Share on other sites More sharing options...
z1r Posted February 7, 2008 Report Share Posted February 7, 2008 I've used aluminum for many years now. My heat sink was also one of my first projects. You can grind your own bit or just use a 60 degree threading bit turned so the leading edge is perpendicular to the heat sink. Link to comment Share on other sites More sharing options...
rdfrench31 Posted February 7, 2008 Author Report Share Posted February 7, 2008 I've used aluminum for many years now. My heat sink was also one of my first projects. You can grind your own bit or just use a 60 degree threading bit turned so the leading edge is perpendicular to the heat sink. I never thought about turning the bit...thanks Z What's the TPI? Link to comment Share on other sites More sharing options...
Clark Posted February 7, 2008 Report Share Posted February 7, 2008 Aluminum conducts heat 5 times better Aluminum has twice the specific heat Steel has three times the density. That makes Aluminum over 3 times better than steel of equal volume. Copper, bronze, or brass is even better than Aluminum and that's what we made the buttressing threads from 8 years ago when my brother and I started this sporterizing. The threads should fit tight and have welding paste all over the place. And how to make buttressing theads? Just screw up the "V" threads, and you are there:) Link to comment Share on other sites More sharing options...
rdfrench31 Posted February 7, 2008 Author Report Share Posted February 7, 2008 And how to make buttressing theads? Just screw up the "V" threads, and you are there:) it's funny you mentioned that, because the first time I turned threads thats what they looked like Link to comment Share on other sites More sharing options...
z1r Posted February 7, 2008 Report Share Posted February 7, 2008 I never thought about turning the bit...thanks Z What's the TPI? 13 Link to comment Share on other sites More sharing options...
BobVZ Posted February 7, 2008 Report Share Posted February 7, 2008 Could you just use a scrap bolt shroud with a brass rod brazed into the end? Link to comment Share on other sites More sharing options...
desmodon Posted February 9, 2008 Report Share Posted February 9, 2008 The threads should fit tight and have welding paste all over the place. What's the welding paste you speak of??? THANKS Don Link to comment Share on other sites More sharing options...
rdfrench31 Posted February 9, 2008 Author Report Share Posted February 9, 2008 What's the welding paste you speak of??? THANKS Don I think he is talking about heat control paste Link to comment Share on other sites More sharing options...
z1r Posted February 9, 2008 Report Share Posted February 9, 2008 I think he is talking about heat control paste Hmm, why on earth would you put heat control paste on the threads? You ever try to get that junk out of a bolt? Link to comment Share on other sites More sharing options...
rdfrench31 Posted February 9, 2008 Author Report Share Posted February 9, 2008 Hmm, why on earth would you put heat control paste on the threads? You ever try to get that junk out of a bolt? dunno i could be wrong...what is welding paste? Link to comment Share on other sites More sharing options...
riceone Posted February 9, 2008 Report Share Posted February 9, 2008 Why turn threads? Just a bronze rod that fits inside the bolt snug and a peice sticking out. rcb Link to comment Share on other sites More sharing options...
Rhys898 Posted February 11, 2008 Report Share Posted February 11, 2008 Hmm, why on earth would you put heat control paste on the threads? You ever try to get that junk out of a bolt? Maybe he meant thermally conductive paste, like you use in between a processor and heatsink in a PC. it fills whatever gaps there are and helps transfer heat. Jer Link to comment Share on other sites More sharing options...
z1r Posted February 11, 2008 Report Share Posted February 11, 2008 Maybe he meant thermally conductive paste, like you use in between a processor and heatsink in a PC. it fills whatever gaps there are and helps transfer heat. Jer Yer s'posed to put that stuff on yer heatsink?? Maybe that's why when I overclocked my new 2160 it went tits up? How you doing? Been a while. Good to see you posting here again. Link to comment Share on other sites More sharing options...
MR1 Posted February 13, 2008 Report Share Posted February 13, 2008 I don't use heat paste, I run water through the bolt and heat sink, the cocking cam doesn't even change color when TIG welding. Link to comment Share on other sites More sharing options...
Rhys898 Posted February 14, 2008 Report Share Posted February 14, 2008 Yer s'posed to put that stuff on yer heatsink?? Maybe that's why when I overclocked my new 2160 it went tits up? How you doing? Been a while. Good to see you posting here again. Most factory heatsinks have either a thermal pad, or a pre-applied patch of thermal grease. But, neither one of those is as efficient as a aftermarket paste called Arctic Silver that is made with atomized silver. Generally for overclocking you want to use either a larger aftermarket heatsink or the same heatsink but with a fan that moves more air. As to how I'm doing, I'm doing ok. Finally got around to bedding my 6.5x55. Haven't shot in months since money has been tight, but other than that everything is OK here. Jer Link to comment Share on other sites More sharing options...
Clark Posted March 18, 2008 Report Share Posted March 18, 2008 Cleaning welding paste out of a bolt body with a tooth brush and hot water is followed with twisted paper towels, compressed air, and an oily toothbrush. I have done this dozens of times, and sometimes I make the toothbrush head narrower. Link to comment Share on other sites More sharing options...
Bennypapa Posted March 19, 2008 Report Share Posted March 19, 2008 Does anyone have a pic of their heatsink? Thanks, Ben Link to comment Share on other sites More sharing options...
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