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ozzi
MMT Pro Member
Joined: Thu Dec 27, 2012 6:07 pm
Posts: 58
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 Driveshaft- 4130 vs stressproof 1144 Sorry this is not a super fun topic with pics. Making a new and stronger driveshaft for my surface drive. Standard cold rolled is too soft, anyone recommend one over the other between 4130 and 1144 stressproof.
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| Mon May 20, 2013 11:21 pm |
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bubba777
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Re: Driveshaft- 4130 vs stressproof 1144 18-4 would be way better
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| Tue May 21, 2013 4:06 am |
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banded-mallard
MMT 1000 Club
Joined: Wed Oct 07, 2009 8:18 pm
Posts: 4310
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Re: Driveshaft- 4130 vs stressproof 1144 17-4 Stainless Boat Shafting
17-4 PH condition H1150
Straightened, ground and polished to boat shaft specs.
Aluminum and Stainless in Broussard, La or New Orleans, La.
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| Tue May 21, 2013 4:59 am |
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pokey79
MMT 1000 Club
Joined: Mon Nov 15, 2010 4:50 pm
Posts: 2282
Location: Circumcised, Louisiana
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Re: Driveshaft- 4130 vs stressproof 1144 I would use PH-17 (aqua met 17)
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| Tue May 21, 2013 5:42 am |
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forever draggin
MMT Elite Member
Joined: Tue Jan 13, 2009 7:10 pm
Posts: 6664
Location: in the marsh with a boat load full of dead hookers
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Re: Driveshaft- 4130 vs stressproof 1144 Where r u located?
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| Tue May 21, 2013 6:24 am |
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ozzi
MMT Pro Member
Joined: Thu Dec 27, 2012 6:07 pm
Posts: 58
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Re: Driveshaft- 4130 vs stressproof 1144 Hi, I'm up in ny.
I was quoted $117 for my part in 4130, this is for a 11hp surface drive running at 6k rpm. It's a Briggs animal so the rpm level is fairly low. Do I really need a hardened shaft for that application? I had my cold rolled shaft split right where the 3/4" bearing race meets the 1" shaft. At the time I may have been over reving to like 8k but now have a 6k rev limiter. This isn't for a gtr or prodrive, I don't want to spend over $200 on the shaft.
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| Tue May 21, 2013 11:56 am |
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forever draggin
MMT Elite Member
Joined: Tue Jan 13, 2009 7:10 pm
Posts: 6664
Location: in the marsh with a boat load full of dead hookers
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Re: Driveshaft- 4130 vs stressproof 1144 Well lets see, u already cracked a cold rolled shaft, do u really need a hardened shaft for ur application?
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| Tue May 21, 2013 2:22 pm |
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ozzi
MMT Pro Member
Joined: Thu Dec 27, 2012 6:07 pm
Posts: 58
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Re: Driveshaft- 4130 vs stressproof 1144 I'm not having any luck finding a local shop that can make a hardened and balanced stainless shaft. I just emailed hill marine for any suggestions, please anyone else let me know any shop that makes prop shafts. All the ones in my area don't heat treat and grind.
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| Wed May 22, 2013 12:24 am |
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forever draggin
MMT Elite Member
Joined: Tue Jan 13, 2009 7:10 pm
Posts: 6664
Location: in the marsh with a boat load full of dead hookers
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Re: Driveshaft- 4130 vs stressproof 1144 Pm me I know a guy but he's way south. He has what u need ill give u his number but ur gonna have to see if he will ship it. That I don't know.
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| Wed May 22, 2013 10:46 pm |
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Mag10
MMT Pro Member
Joined: Wed Jan 14, 2009 12:31 pm
Posts: 342
Location: Faribault, Mn
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Re: Driveshaft- 4130 vs stressproof 1144 Buy 4140 pre hard turned ground and polished. Speedy metals has it 3/4" X 48" for about $30.
17-4 H1150 is also good, but is typically oversized for running through a .750" bore bearing and will require a light pass on a lathe
Mag10
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| Fri May 24, 2013 11:17 am |
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SwampDuck91
MMT Member
Joined: Thu Jun 02, 2011 11:50 pm
Posts: 49
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Re: Driveshaft- 4130 vs stressproof 1144 Super Duplex or Inconel 625
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| Fri May 24, 2013 8:11 pm |
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OlSchool
MMT Pro Member
Joined: Sun Jan 06, 2013 4:24 pm
Posts: 384
Location: Louisiana
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Re: Driveshaft- 4130 vs stressproof 1144
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| Fri May 24, 2013 9:04 pm |
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bubba777
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Re: Driveshaft- 4130 vs stressproof 1144
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| Sat May 25, 2013 6:47 am |
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blmaloney
MMT Pro Member
Joined: Mon May 21, 2012 2:18 pm
Posts: 56
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Re: Driveshaft- 4130 vs stressproof 1144 I would look at why it cracked. I build a 16hp surface drive with ¾ cold rolled steel shaft and a 10x8 prop and the engine has the governor removed so it will free spin until the valves start to float (7k +) and I have not had a problem running it. Ran through mud and rocks all last season and the only wear is on the prop which took a beating.
Just my 2 cents
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| Fri May 31, 2013 3:44 pm |
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