Janux IC (Inter-Changeable) Dual Gear Drive

[tsr]

Does the gear drive also work with psychotillers “heXL TKP Split Angle Trucks”?

[Janux-esk8]

Will find out soon, awaiting for @topcloud to send me his heXL TKP

[iespobolamas]

Dang these look sweet!

do they have a lot less rolling resistance than belt/pulley set up? could they be the answer to push dreams?

[Janux-esk8]

[Alpacaslapper]

I’ve developed a dual setup for standard Cal truck running pneumatic tires. Also @Bobby is currently running the same setup. My Janux IC gear drive does not require e-Cal for a dual 6355s setup. Everything is designed around the standard axle length of regular Cal.

My Janux IC “Naked” Gear Drive

Does this system seal well enough to run gear oil? Would be sweet to see it without being slimed up with grease.

[Bobby]

I dont think so… you still get a small amount of grease that can come through so I feel like gear oil would definitely leak.

[Janux-esk8]

V-ring does not completely seal the system from gear oil escaping. Grease is used instead.

[370HSSV]

@Janux-esk8 Any words the ones for SR TKP will work on psychotiller’s heXL trucks?

[Riako]

No space for pressfit mount …
No bearing in wheel adaptor possible too.

Until this happened (or maybe with another mount system … but gear need bearing I think):

Currently the Psychotiller Six Shooter rims have pulleys bolted onto them. There are no “press-fit” pulleys for Six Shooters. They work great and as a result I’ve never had a misaligned belt or felt as if the belt tension on the pulley skewed the wheels or was causing a problem.

On urethane wheels with “spoke holes” in the core, you can bolt on pulleys and expect the same result as with the Six Shooters. Once I fasten pulleys to a wheel, I keep them there until I wear out the wheel, just as I put bearings in a wheel and keep them there. Bolting pulleys on a urethane wheel isn’t pretty, but it works well.

Having a press-fit pulley in a urethane wheel isn’t a bad idea, but there are a few challenges that have to be dealt with before you can be happy, joyous and free. First of all, where are all of these perfectly designed pulleys and what bearings do they use and what is the standard for bearing positioning? In order to answer that question you have to know what wheel/core you are using, what bearings or speed ring is on the axle, and where the pulley positions the bearing before you can make a hanger that accepts the pulley bearing perfectly. I’ve included a rendering of a pulley and a bearing that fits on a hex hanger perfectly. These dimensions are critical. The cylindrical section of the hanger has to hold the bore of the bearing using a decent slip-fit. The ledge where that cylinder terminates acts as a stop for the pulley bearing and must be positioned perfectly or it will bind the bearing (too close to the end of the hanger) or it will allow the pulley and/or bearing to slide side to side.

The bearing I’m showing has a 19mm bore and a 30mm OD. When the “ledge” is about 22mm from the end of the hanger, the bearing is actually underneath the teeth of the pulley. Some companies (who will remain nameless) have a pulley bearing that’s more in line with the pulley’s flange and doesn’t really do all that much.

You can get great concentricity when you cut the axle holes, cylinder, and hanger face all in the same clamping in a lathe using a hex collet. I think that you’ll probably see this as a feature once a number of great plastic-injection-molded pulleys that fit genuine Flywheel cores become available. I want to make pulleys that can be bolted on (without the bearing) OR press-fit in (with the bearing). The hangers would work perfectly with either …

[Janux-esk8]

A bit hick up on Karl side . Hopefully he’ll send them out soon.

[Janux-esk8]

Easily swapped out between urethane street wheels and AT pneumatic wheels such as 6x2 Aliexpress or Bergmeister

[thisguyhere]

marc, have you gotten the hexl from karl yet? i got a set i could send your way for testing.

i’m on the fence between rkp or, if it works, for hexl. but i’d have to wait for you to confirm it works for hexl before i can make that decision.

also, how does the wheel pulley swap work on bergs? is there an adapter or they just work for abec and bergs?

[Janux-esk8]

I have not received the hexl from Karl. I was told there was a recall on the hexl due to hanger bending issue.

I did have a chance to do a quick test fit with my current TKP adapter, hexl is a hair thicker than TKP hanger.

The issue with hexl is the axle length. It’s a standard length axle, don’t have the option of extended axles as TKP. Unfortunately, the short axle prevented hexl truck to work with my current TKP gear drive system. I would have to design a new adapter.

As for wheel swap, Abec Flywheel has its own pressfit adapter and spur gear mounting pattern. Berg has its own Quattro hub with its own spur gear mounting pattern. They both share the same truck adapter, motor plate, motor spur gear, and housing.

Quattro hubs were designed to fit either 6x2 Aliexpress tires or Berg

[thisguyhere]

ok, let’s leave it alone with hexl then for now.

rkp it is.

Berg has its own Quattro hub with its own spur gear mounting pattern

does this mean there will be a separate wheel pulley for bergs?

[Janux-esk8]

Yes, there will be a separate spur wheel for both Flywheels and bergs.

Flywheel spur gear has 5-holes mounting pattern

Berg or 6x2 Aliexpress tires with 4-holes mounting pattern

[Zach]

Is the gearing the same for the two different wheels?

[Janux-esk8]

Above video showed the same 44t spur gear on both wheels. You could also swap out different sizes, 42-46t gear but adjustment to the wheel spur is necessary for proper meshing if size is different.

[Zach]

Veeerrryyy interesting. So what would you say is the expected gearing ratio’s possible/ offered?

[Janux-esk8]

Available wheel spurs: 15,16,17, and 18t.
Wheel spurs: 42, 43, 44, 45, and 46t.

Depending on the trucks, not all gear combination are possible due to interference of the hanger.

[thisguyhere]

niice. suppose i should look out for that recall then…