nickr Posted September 12, 2007 Share Posted September 12, 2007 I'm overhauling my front swivels and was rather nervous of rounding off the bi-hex bolts holding the Swivel Ball to the Axle. I took my time and used a good spanner and everything went ok. Now that I'm ready to put things back together, I'm wondering whether to use the orignal bolts or replace them. If I replace them is it possible to get a hex bolt alternative rather than the Bi-Hex (p.n. TYG100590) Also, is there a good technical reason why Bi-Hex is used in a place so prone to muck and hence rust! Regards Nick Quote Link to comment Share on other sites More sharing options...
Ex Member Posted September 12, 2007 Share Posted September 12, 2007 The 12 point heads are used because there is not room for a socket. The closed end of a spanner should fit them perfectly and allows for high torque to be applied. If you had 6 point heads, there would be no way to apply a lot of torque. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted September 12, 2007 Share Posted September 12, 2007 I may be wrong but aren't the "proper" bolts also pretty hard ones i.e. 10.9s or something? Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted September 12, 2007 Share Posted September 12, 2007 I replaced them with the same, new. Quote Link to comment Share on other sites More sharing options...
istruggle2gate11 Posted September 12, 2007 Share Posted September 12, 2007 I replaced them with the same, new. I dont, I drill them out to 10.2mm and then tap them to M12. Its an old comp safari trick. Use m12 (10.9) cap head bolts and have a stronger joint, that doesnt come loose when hitting the rough stuff Worked fine everytime. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted September 13, 2007 Share Posted September 13, 2007 Some people replace them as a matter of course, but if the old ones are still in good condition, then re-use them. Don't forget to clean the threads and use thread locking compound. Les. Quote Link to comment Share on other sites More sharing options...
Coastcard Posted September 13, 2007 Share Posted September 13, 2007 Take a view on what they will be like next time you need to remove them. Not exactly a major financial decision Same with the brake caliper bolts which are nicely tucked away as well. If in doubt, I would replace - you just need to read some of the threads on here about the nightmare people have removing rounded off caliper bolts. Quote Link to comment Share on other sites More sharing options...
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