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Author Topic: Stainless bolts strong enough?  (Read 888 times)

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Offline Franky

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Stainless bolts strong enough?
« on: July 18, 2014, 11:42:03 am »
I have the cases of my CB550 split, and it won't be long before I'll put it back together. I have bought a SS kit for the top end/covets, but would like to replace the cases/engine bolts as well.

Will regular SS bolts be strong enough or are the Honda bolts made of extra strong Hondanium?

I read not to use copper anti-seize - anything else I should be mindful of?


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« Last Edit: July 19, 2014, 03:18:52 am by Franky »
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1974 Honda CB550 K0 Stock
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Offline calj737

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Re: Stainless bolts strong enough?
« Reply #1 on: July 18, 2014, 11:47:30 am »
Stainless is differing grades of steel. And not all stainless is as strong as the factory bolts. I too replaced all case bolts with stainless, but, I used ARP stainless bolts. They are very strong and have tensile strength of up to 180,000 psi. You can get them in a flange head which will be similar to the factory style fastener.

There's one extra long 8MM bolt that is unobtanium and you'll either have to re-use the stock bolt, or make one. I made one from 303 stainless and used an ARP nut welded on to provide the strength for the head.

www.allensfasteners.com
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline bjbuchanan

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Re: Stainless bolts strong enough?
« Reply #2 on: July 18, 2014, 02:05:22 pm »
They get tightened barely more than finger tight so it really doesn't matter. You will very easily strip threads before you get near breakage torque.
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Offline calj737

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Re: Stainless bolts strong enough?
« Reply #3 on: July 18, 2014, 02:18:43 pm »
Quote from: bjbuchanan on July 18, 2014, 02:05:22 pm
They get tightened barely more than finger tight so it really doesn't matter. You will very easily strip threads before you get near breakage torque.

He's talking about the case bolts, not the side covers. Case bolts see much higher torque. But not more than 303 Stainless provides anyway.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline bjbuchanan

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Re: Stainless bolts strong enough?
« Reply #4 on: July 18, 2014, 02:39:41 pm »
Missed that part, but yeah, like you said they are enough
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The dirty girl-1976 cb750k, Ebay 836, Tracy bodykit
Round top carbs w/ 38 pilots, middle needle position, airscrew 7/8ths out, 122 main jet
Stock airbox w/ drop in K&N, Hooker 4-1

Don't trust me alone with a claw hammer and some pliers

Offline Oldtech

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Re: Stainless bolts strong enough?
« Reply #5 on: July 18, 2014, 04:13:05 pm »
For any none standard fasteners find a supplier that deals with Spaenaur. Won't be cheap but they have stuff that you've never imagined even existed. Aluminum, titanium, stainless etc etc. I'd be very suprised if they couldn't supply your long 8mm bolts in stainless.
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Offline calj737

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Re: Stainless bolts strong enough?
« Reply #6 on: July 18, 2014, 04:49:02 pm »
I did actually try them. They, like everyone else, seems to stop at 100mm length. The bolt in question is like 155mm. No matter now, I made one.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Stev-o

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Re: Stainless bolts strong enough?
« Reply #7 on: July 18, 2014, 07:40:22 pm »
Quote from: calj737 on July 18, 2014, 04:49:02 pm
No matter now, I made one.

Ok, I'm impressed.  Good thinking.
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