Replacing bolts - SV650.org

tigersaw · 13-10-09, 04:17 PM

A fair few of the bolts on my traily bike have been mullered by cack hands using wrong tools in the past, so I want to replace them.
Mostly the common M6 made of cheese cross head ones.
However, after plenty of googling, the common advise is NOT to use stainless steel, as the tensile and shear properties are different, plus then can weld themselves into casings. Similar warnings against anodised alloy.

Any idea of the correct bolt type - I seem to be finding 8.8 or 12.9 being mentioned as tensile strength, and the correct material?

Edit: Would cheapo one like these be ok? http://www.screwfix.com/prods/51840/...25-Pack-Of-100

jambo · 13-10-09, 04:28 PM

For most places stainless steel is fine, Aluminium alloy is best off only being used for low stress situations such as fairing panels.

Certain points like brake caliper mounting bolts, brake disc bolts etc should have you getting fussy about the grade of metal.

Jambo

yorkie_chris · 13-10-09, 05:17 PM

Engine case bolts are fine in stainless, use a dab of grease and they'll be reet.

13-10-09, 04:17 PM	#1
tigersaw Member Mega Poster Join Date: Mar 2005 Location: Llanwrtyd Wells Powys Posts: 1,146	Replacing bolts A fair few of the bolts on my traily bike have been mullered by cack hands using wrong tools in the past, so I want to replace them. Mostly the common M6 made of cheese cross head ones. However, after plenty of googling, the common advise is NOT to use stainless steel, as the tensile and shear properties are different, plus then can weld themselves into casings. Similar warnings against anodised alloy. Any idea of the correct bolt type - I seem to be finding 8.8 or 12.9 being mentioned as tensile strength, and the correct material? Edit: Would cheapo one like these be ok? http://www.screwfix.com/prods/51840/...25-Pack-Of-100 Last edited by tigersaw; 13-10-09 at 04:20 PM.

13-10-09, 04:28 PM	#2
jambo Member Mega Poster Join Date: Aug 2003 Location: Croydonia Posts: 5,376	Re: Replacing bolts For most places stainless steel is fine, Aluminium alloy is best off only being used for low stress situations such as fairing panels. Certain points like brake caliper mounting bolts, brake disc bolts etc should have you getting fussy about the grade of metal. Jambo __________________ Modern motorcycles are bloody brilliant, enjoy it while we can

13-10-09, 05:17 PM	#3
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Replacing bolts Engine case bolts are fine in stainless, use a dab of grease and they'll be reet. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

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