i know, i know, another pinion question - apols...

im just thinking out loud again - im gonna try some taller ofna/hobao pinions on my truck, if they work and the truck pulls ok, then i may be able to use the genesis pinions too. the reason im considering the gen ones is becaused the smaller ofna ones do wear a fair bit on gen spurs and these taller ones may also, maybe the genesis pinions wont wear so quickly?

i have a few options re engine mounts and therefore options as to what clutch bell i use. i think i can use a HPI onroad 2-speed clutch bell as i think these have m12 threads for 1st and 2nd and would work with the genesis pinions - is that right?

hope that makes sense...

edit - ok so its not the hpi bell... doh - but im sure theres some out there that use m12 threads for both 1st and 2nd arent there?

just found it - traxxas do one - it will work wont it? just gotta sort some bearings if they aint std clutch ones...?

Remember this?

http://www.rcuniverse.com/forum/m_30...tm.htm#3114404

I would start by looking at the clutch bells that those pinions use.



rolland

poor judgement has left the forum, but can be found outside, beating himself across the head with a cricket bat...

thanks Rolland... ahem... sorry.

LMAO

No problem. When you asked I had figured that either you forgot or I wasted allot of fuel and time. I was really hoping that you had forgotten.

I am not sure what size pinions you are looking for but is there a possibility that you can use the Genesis clutch bell and flywheel? I know that the Genesis setup is bigger but I am not exactly sure by how much.
From the looks of the bell you can easily change the pinions around so that they work with the FF 2 speed.
If they hold up in the Genesis they should last forever in the FF.
Nova has some nice aluminum shoes for the Genesis also http://www.novarcproducts.com/genesisclutchshoes.html

If the Genesis pinions are m12 thread then you should be able to screw them on one of the bells in that link. I believe the Associated one will probably be the easiest to get.
If they are m12 please let us know.


rolland

it was just a thought, the larger sized pinions that i have coming might wear a lot better, yknow how it is with those little pinions...

thanks for reminding me, dunno what i was thinking - one of those "mature moments" is my best excuse.

Since I started using the HPI steel pinions I haven't had a problem with wear. The aluminum ones however would wear out way to fast for my liking.

What problems are you having with the Ofna pinions? The only issue that I could see is the gap between the pinions.


rolland

u still on plastic spurs Rolland?

the ofna pinions are loads better than the cen alloy or steel ones, but the steel is still kinda flowing both back into the grooves and toward the tip of the teeth, thinning them down and slowly shortening the teeth. hope that makes sense, cam batts are on charge...

im still running it on the beach, so of course the sand isnt helping, but to be honest, it doesnt look like the sand is wearing them that much, not like the others at least, its more the torque from the motor, i feel. this could be as good as im gonna get it, but the spurs still look like new, but with a little silver showing on the teeth now.

sure, pinions do and should wear quicker, but heres the crunch - set of ofna pinions - Β£8, 2 speed ofna clutch bell - Β£15, steel bearings to suit - Β£4 plus postage... now the pinions hold the bearings in the bell, the pinions refuse to budge off the bell after use, even with heat etc, so when i kill a set of pinions, it costs too much to replace it all. in comparison, the genesis spurs are Β£8 each here, so it would actually be cheaper to replace them instead!

as for the gap between the ofna pinions - it doesnt seem to matter much at all - no they are not perfectly aligned, but its not even 1mm out, so its not a case of being short on load bearing area on the gears thats causing extra wear.

what we really need is a cover for the spurs and pinions and some lubrication on them, that will help no end i am sure. has anyone seen a cover from another manufacturer that may work? just a thought...

Still running the plastic spurs. Haven't had a problem so I don't see a need to change them.

So ideally what you are looking for is pinions that are harder than the stock Ofna pinions. That might be hard to do because Ofna pinions are about the hardest that I know of. I am sure somebody makes hardened Ofna pinions that might be harder than the stock ones but I have no idea who.

It might be an idea to go back to the plastic spurs, that is of course they can handle the power of the .28, they will wear faster than the Ofna pinions.

For a cover on the pinions\spur gears. I have never seen one.




rolland

no worries then, gas torch and a tub of oil it is for the pinions, see how they like that!

If the pinions are wearing out faster than the metal spurs then the pinions are not hard enough or the spurs are harder than the pinions. Heating them up and quenching them might make them last a little longer but ideally what is need is some real hardened steel pinions for the FF.

I wonder if Dr Honda would be interested in tooling up to make some gears. I have no idea what the tools would cost to make them but he wouldn't be limited to just CEN products.



rolland

I made a mistake when I ordered the ofna/hobao gears... I wanted the Hyper 7 2 speed pinions, but ordered the Hyper 10 pinions - oops. However... the ofna 1st gear pinion fits the cen clutch bell as a 1st gear. The ofna 2nd gear pinion wont work on the cen bell tho, the thread is too large on the pinion - m14..?? Both are hard steel - unsure of grade tho.

They seem pretty hard to find - trust me to find em tho... but anyway, I got a 13/17 set and a 15/19 set, so, as I said, the 13 and 15 would both work as a 1st gear pinion on the cen bell.

I am trying to get the ofna/hobao bell to go with them, hopefully this will be the end of my pinion probs... yea right... if not then its looking like Gen pinions on an Associated bell, like u say mate. Tricky to find much Associated stuff here in the UK tho.

There tends not to be too much Associated stuff stocked by shops, but they are distributed by CML so there should be no problems in ordering the stuff from your LHS.

Nice one, thanks for that mate.

The Genesis pinions should thread onto the m12 portion of the 2 speed CEN bells.
With the Ofna m10 pinions and the Genesis m12 pinions you should be able to come up with a varied assortment of gear ratios using the FF's clutch bell.

1st and 2nd gear on the Genesis bells use the same thread. You might have to thin them down abit.

Thanks for the info on the Ofna Hyper 10 pinions.


rolland

Hi,

I produce Cen Genesis pinions, they're ΓΈ12x0.5mm thread.
Mine are machined and heat treated pinions, will last much more than the original.

They come with 17T & 21T but for a batch of at least 5 pieces I cna do the number of teeth you want from 17 up.

If you need more info please contact me at

[email protected]

Ciao

hi again Toto,

as far as i am aware, its just myself who is having funfactor pinion issues, i tried to drum up some more interest for your gears on here a while ago, but not enough people came forward - there would be more interest, i think, if you could produce smaller gears (11, 12 or 13t) with an M10 thread as well as the M12 pinions - they would then suit the cen funfactor clutch bell.

have you thought about steel or alloy spur gears for the funfactor - these may be more popular, if you have the facilities to make them. just a thought.