You were right calling them spiral cut more then helical. Helical cut is for two gears that are directly inline like a transmission gear and not at an angle like a ring and pinion differential gear set. Really that cut is called Hypoid gears like a real truck has on the front and rear diffs. Very cool design. Should be quieter too. My only concern would be wear because of the hypoid design the teeth slightly slide accross the faces of eachother. Which is why there is a specific Hypoid gear oil for real vehicles.
Awesome stuff, I just stumbled onto these and i've been needing new differentials for my XO-1 which i think these will fit since the XO-1 and the 1\10 4x4 Traxxas trucks use the same differentials as the XO-1 does. I might buy myself a set of these diffs next month for my car i also saw the aluminum cupped diffs as well i love your company and products so far can't wait to get my first set soon.
@@CobraRacingRC Thanks for the very kind words, My project has taken a long time to decide what i was going to do but after some hard thinking and some time i decided to keep the car i have and make it one of the best XO-1's there is. And after i heard about these diffs it helped me decide what i was going to do.
There are a few crawlers that still do use helical gears. The reason why some have moved away from Helical is because they are harder to manufacture, and also cost more. And nowadays, unfortunately, some of these companies are cutting back on production costs, while at the same time increasing price of these cars. Helical where widely used on crawlers in the past, but they again, things back then where just built different imo.
No they go to flat cut because there stronger an don't break teeth. There's more engagement of surface on teeth where helical gears are quiet but less area touching. That's why in our race cars that I run at the drag strip we go to a dog box with straight cut gears in order to hold more power over helical gears
@@jakejager hardened plastic body, yes. Reason being is that aluminum body is beefier then the plastic version, so won’t fit in our aluminum housing. So these diffs are meant to be an exact fit.
You were right calling them spiral cut more then helical. Helical cut is for two gears that are directly inline like a transmission gear and not at an angle like a ring and pinion differential gear set. Really that cut is called Hypoid gears like a real truck has on the front and rear diffs. Very cool design. Should be quieter too. My only concern would be wear because of the hypoid design the teeth slightly slide accross the faces of eachother. Which is why there is a specific Hypoid gear oil for real vehicles.
Awesome stuff, I just stumbled onto these and i've been needing new differentials for my XO-1 which i think these will fit since the XO-1 and the 1\10 4x4 Traxxas trucks use the same differentials as the XO-1 does. I might buy myself a set of these diffs next month for my car i also saw the aluminum cupped diffs as well i love your company and products so far can't wait to get my first set soon.
Thank you 🙏. And take your time whenever your ready 😀
@@CobraRacingRC Thanks for the very kind words, My project has taken a long time to decide what i was going to do but after some hard thinking and some time i decided to keep the car i have and make it one of the best XO-1's there is. And after i heard about these diffs it helped me decide what i was going to do.
What about for the center differential?
In the works - we should have it in a few weeks.
Why have most crawler mfg'rs move away from helical?
There are a few crawlers that still do use helical gears. The reason why some have moved away from Helical is because they are harder to manufacture, and also cost more. And nowadays, unfortunately, some of these companies are cutting back on production costs, while at the same time increasing price of these cars. Helical where widely used on crawlers in the past, but they again, things back then where just built different imo.
No they go to flat cut because there stronger an don't break teeth. There's more engagement of surface on teeth where helical gears are quiet but less area touching. That's why in our race cars that I run at the drag strip we go to a dog box with straight cut gears in order to hold more power over helical gears
Plastic?
@@jakejager hardened plastic body, yes. Reason being is that aluminum body is beefier then the plastic version, so won’t fit in our aluminum housing. So these diffs are meant to be an exact fit.
@@CobraRacingRC I mean the gears, the case is fine, almost preferable to be plastic, just worried about the toughness of the gears.
@@jakejager gears are all hardened steel. They ain’t breaking or stripping.
@@CobraRacingRC that's what I like to hear! Thanks 🙂
Helical-cut, not spiral. Just like a modern full-size car.
@@fredk.2001 helical cut would be the correct term yes. Most people in the RC space still call them spiral cut tho.
That's because they've not been educated on the correct terminology!❤@@CobraRacingRC
@@lowellfunk8974, indeed. Just trying to inform people, not trying to be mean.
@@fredk.2001 neither was I. Not everyone has the same life experiences and learning experiences either. That's just the way it goes. 🙂