[Welshy40]

Originally Posted by oosh123

Looking on the history of diffs. First the open gear diff, then closed gear diff with grease, ball diff, to the newest sealed silicone oil gear diff. I think its time for an evolution.

Gear diff wise, because the Lazer diff is so small, I started studying the V one R4 & the TF-6's diff. After some research and owning a TF-6, I found that the stock bevel gears strip extremely easily. The only way around that is the metal bevel gears that kyosho sells as option which cost upwards to $80 a diff. Futhermore, even with perfect shimming, the gear diff still don't have the smoothness as a ball diff (you can still feel the gears when turning it slowly).

With my design, bearings, diff balls, springs, O-rings(if engineered correct, one o-ring is enough. We found 2 orings in the plastic diffs because plastic injection molding sometimes can be hard to control) can easily be sourced on ebay. All I need to make is the housing, the inner rod/ball holder rod and the diff ball holder. It elimiated the needs to buy the expensive bevel gears that kyosho offers.

I believe this diff can be much smoother then a sealed gear diff. The ball holder/rod thing should not wear out, this diff is not like ball diff where it needs more force to squeeze the ball to make it stiffer. The groove is simply to hold the balls tight enough to stop any slippish. All metals (except the housing) will be stainless steel hardened. Also, there are different ratings for the wave spring which provide different level of preload.

Copy right it as you designed it and companies like durango, schumacher, kyosho and tamiya will copy. I cant wait for my bits to test and will be looking forward to testing this.