TomB Posted May 9, 2019 Share Posted May 9, 2019 I've removed the M10 hex bolts in Grade 10.9 from my de-dion ear to tube points. Ideally Id like to replace like with like, but Im having trouble finding the correct length in grade 10.9 with the zinc plating - Grade 8.8 is widely available however. What specification bolts should be used here? And on teh subject of bolts, does anyione know what botls are used to attach the rear brake calliper to the DD ear? I cant see them on the bolt list Ive got. Link to comment Share on other sites More sharing options...
ChrisC Posted May 9, 2019 Share Posted May 9, 2019 New manual is nice and clear on this M10 x 65 Grade 10.9 Rear hub through ear to front DeDionM10 x 55 Grade 10.9 Front hub through ear and Caliper Carrier BoltM10 x 40 Grade 10.9 Through rear of ear into threaded Dedion holes Think I would stick to grade 10.9, my local fastener place gets them with a couple of days lead time. Not sure how close to tolerance they are, but don't fancy my rear wheel falling off. Link to comment Share on other sites More sharing options...
TomB Posted May 9, 2019 Author Share Posted May 9, 2019 CC have confirmed they should be 10.9, but they only sell them as part of the fastener pack, not separately. Redline, Spalding Fasteners and a couple others I've tried can't do one of the variables on length, grade or head. My main options seem to be clean and reuse the old 10.9, or fit caphead 12.9 grade in the right length. The old bolts visually look OK. Link to comment Share on other sites More sharing options...
TomB Posted May 9, 2019 Author Share Posted May 9, 2019 Ive ordered 12.9 capheads to replace the old 10.9 hex bolts in the end. I probably could have reused them, but all the other signficant nuts and bolts are being replaced, so in for a penny in for pound..... Link to comment Share on other sites More sharing options...
rj Posted May 9, 2019 Share Posted May 9, 2019 Beware that altough higher tensile strength 12.9 bolts are also more brittle than 10.9According to my local bolt pusher you should never use a plated 12.9 bolt for anything serious as the plating will make it even more brittle. Link to comment Share on other sites More sharing options...
TomB Posted May 9, 2019 Author Share Posted May 9, 2019 Oh bugger. I’d better call Spalding Fasteners tomorrow then as they’ve been dispatched. Guess I cleaning up my 10.9 hex bolts then! Link to comment Share on other sites More sharing options...
ChrisC Posted May 9, 2019 Share Posted May 9, 2019 Anything wrong with these guys (apart from the name of course)https://www.westfieldfasteners.co.uk/BZP-10.9_ScrewBolt_HexHd_M10_THRpart.html Link to comment Share on other sites More sharing options...
DJ. Posted May 9, 2019 Share Posted May 9, 2019 If you can find the correct grade of bolt but extra long, it is easy to cut them to length, and as long as you put some copperslip on the ends corroding isn't really a problem.Duncan Link to comment Share on other sites More sharing options...
TomB Posted May 9, 2019 Author Share Posted May 9, 2019 Ah, Westfield fasteners might work I’ll have a cover look after the boys bathtime Link to comment Share on other sites More sharing options...
7 wonders of the world Posted May 9, 2019 Share Posted May 9, 2019 or Kays on ebay, there pretty hot with cracking service too Link to comment Share on other sites More sharing options...
ScottR400D Posted May 9, 2019 Share Posted May 9, 2019 A 12.9 would normally be used if you needed a higher torque/clamping force but you’ll only need to use the CC figure which will mean they’re not close to being stressed. It won’t necessarily eliminate embrittlement cracking though, but if you make sure you use a reputable brand you should be OK. Link to comment Share on other sites More sharing options...
Mechanical Moz Posted May 11, 2019 Share Posted May 11, 2019 Have you tried http://jrwebster.co.uk for fasteners? There's several branches around the northwest.Check the height of any new nyloc nuts compared to the originals, Caterham seem to use low profile ones in lots of places so a full height nut can be too long to engage the nylon. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now