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Old 02-06-2017, 10:09 PM   #31
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Originally Posted by bornox View Post
i wonder if that would work on exotek diff housing
Can't say for sure but if the exotek diff housing is similar to the original F104 diff then you'll need the F104 spur gear adapter.

You use normal 1/8" balls
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Old 09-30-2017, 06:34 AM   #32
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Yep I run the Axon DTS spur gears on my Roche F1
How do you keep your spur from moving left to right? There seem to be a lot of play between the 2 D rings when the balls are in compare to let's say a Xenon.

Nog
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Old 09-30-2017, 08:39 AM   #33
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How do you keep your spur from moving left to right? There seem to be a lot of play between the 2 D rings when the balls are in compare to let's say a Xenon.

Nog
I just let it float left to right ... doesn't seem to affect things much
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Old 09-30-2017, 10:27 AM   #34
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Originally Posted by EDWARD2003 View Post
Axon is a company based in Japan that offers spur gears for touring car and direct drive classes. I've personally used the direct drive spur gears and they are by far the BEST spur gears I have ever used. The gears are super precise, light weight, and durable. A lot and I mean a lot of drivers in Japan have switched over to these gears.

-My experience-

I know the importance of building a smooth direct drive differential. I use top quality components such as super flat mirror finish differential rings, bearings, ceramic balls, thrust bearings and so on. However, one component I overlooked was the spur gear. That said, one day I installed an Axon direct drive spur gear in both my stock and modified 1/12th cars. These spur gears are so precise they actually improved the differential action even more. I was completely shocked by this. I never thought a spur gear design could have such an impact on the overall differential action.

These are seriously the BEST gears I've used.

https://www.youtube.com/watch?v=tRnZrWUajr8

YouTube product review of the Axon TCS and DTS

Touring Car Spur Gears

SPUR GEAR TCS?AXON????? ???????

Direct Drive Spur Gears

SPUR GEAR DTS?AXON????? ???????

Oils/Springs/Bearings

?AXON????? ???????


Please check them out on Facebook

https://www.facebook.com/AXON-inc-11...80329/?fref=ts
Trueness of the spur gear is very impotant, but it will also depend on the spur hub, bearings, etc.... Axon gears in 64p is a must because of the small pitch size, but in 48p you can get away with other not so perfect gear manufacturers...
Ps: Most racers sand their diff rings rather than have them mirror finished....
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Old 10-02-2017, 04:07 AM   #35
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Originally Posted by nogarats View Post
How do you keep your spur from moving left to right? There seem to be a lot of play between the 2 D rings when the balls are in compare to let's say a Xenon.

Nog
I don't own a Roche F1 but I just checked it's manual, maybe you can try using a flanged bearing on both sides of the spur, instead of just one on the side of the fixed D-ring. The extra flange should position the spur closer to the left side of the chassis.

I noticed the same issue when I changed to an AXON DTS spur on my Kawada M300 FX4, which uses flangeless bearings throughout the diff assembly. The spur float was maybe 2mm. I replaced one of the bearings with a flanged one to take up the slack and now it leaves only a small gap. However, this makes the diff balls a bit eccentric from the spur and I've yet to test it out on the track.

Hope this helps
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Old 10-02-2017, 04:19 AM   #36
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Just let the gear center itself, it will run true when moving forward.

A flange bearing on center will make the diff grab more turning one direction. It will feel inconsistent.
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