Quote:
Originally Posted by simplechamp
I'm wondering what is the reason you need to use the TT spur and modify it? Seems like it might be easier to make your own out of alum. since the hardened steel is so much tougher to work with. All you need is a circle of alum with the correct diameter, then drill/tap the four mounting holes and drill a hole through the center for the shaft to go through.
|
I would say it's a bit more complicated than that. You need a small round groove on the inside of the cap for the O ring to fit in nice and snug so the lube won't leak around the output shaft. A lip around the edge of the cap that fits over the diff case to center it. The hole for the output shaft has to protrude by 6 or 7 mm so the shaft turn straight and true and doesn't wobble all over. The aluminum cap you speak of would have to be quite a bit thick if you want to screw into it to hold the output gear in place. The modified spur gear or ring gear is not that thick but it is so hard that even though there's only 4 or 5 threads to screw in, you can torque those screws very hard and the threads won't strip, the threads on the screws will strip first even if you're using 12-9 screws. CowbyRay made his cap out of aluminum but they were done right and there was some extensive machining involved. It was more than just a flat piece of round stock.