by atmosports » Sun Aug 21, 2005 1:09 pm
Generally I make mine out of 6061/6063 aluminium it depends what grade I can get 5083 is also pretty good. IF you've got the $$$ 7075 is better again. You could use Steel but ti will rust unless you plate it etc. Stainless is way to heavy & too slow machining. If you think aluminium is too soft then just get it anodized,hard anodized or TIC/TIN coated.
As for bearings you just need to buy a suitably sized spherical bearing to fit, spend the $$ & buy the best you can buy to avoid disappointment. I would recommend any sold by the likes of Cardwells/Kendalls etc as they are designed for aerospace/motorsport use. Generally these come in Imperial sizing with metric ones harder to get in good quality & more expensive. I normally use about a 3/4" ID one & then just make up a sleeve of two to take it back to the same size as the strut/shock shaft. I put mine in the top plate/housing so they sit against a hard shoulder at the top & then hold them in with a circlip underneath & have never had one fail like this. One thing to check is you may need to buy high angularity bearings to stop them from binding up when running extreme angles, otherwise you may just need to get creative with the spacers top & bottom. As for mountings to the bodyshell, the factory amount of holes should be sweet anything between 2-6 is fine & the same goes for factory sizing. Taping the threads into the aluminium is fine so long as you remember it's aluminium & don't strip the threads out on assembly/tightening. As for fasteners I'd recommend the minimum of a grade 8 bolt, but preferably I'd run a grade 12 or higher capscrew, for nuts if it's low heat then a nyloc will work fine but high heat I'd run a metal lock nut or else being anal I'd drill it & lockwire it
Hope this helps I've made heaps fo them but these days unless you really ned to make them it's probably cheaper to buy off the shelf like racepro/tein etc.