14s Brushless Savage

[nuz69]

Originally Posted by Nard Cox

HPI pinions are crap. Buy some of RCMikes hardened pinions.

No ! The new RCM pinions (black) are crap :( worst than hpi, I shread them in 6-7 batteries on my MBX5T... And I know many other guys having this problem with RCM pinions. Other RCM parts are just great, but Mike need to change his pinion supplier !

[Jahay]

hmmmm... i will try novak first...

When i do eventually buy the RCM Centre diff i will buy some of mikes pinions with it too...

Thanks a lot Nard!

Backon topic for the 14s beast!

[mckrill]

As for pinions I have used these:




Quality is superb. For the past trucks, buggys, brushless 1/8 track etc I have used Mikes Pinions, but as I needed a bore 8mm I had to find another supplier..

[Jahay]

those arent mod1 pinions are they? They do look solid and looked at their site but have nothing i can use...

Just a quick question... larger pinions gears such as 21t and 22t wear slower and better than smaller ones dont they?

[mckrill]

Its is Mod1 - it was worth a try even if you couldn't use them.
When I ask the mechanical engineers at my office they claim that the strength of the single teeth is more important unless much larger gears are used (on steel gears). If so then that's the reason why the bullet proof diffs have 9 teeth compared to the stock 13 on the Savage - I think it is claimed to have the same steel and degree of hardening?

I have used from 9t up to 25t Mod1 pinions from Mike, depending on application, and never ripped any of them. I would guess that the shape of the teeth is extremely important, but my transmission design knowledge is very limited.

[Jahay]

i have no idea to tell you the truth... I have just asked the qustion in the general forum so it will be nice to see what people say...

[suicideneil]

Well, since ( generally speaking ) spurs are twice the size of pinions/ twice the number of teeth, for every revolution the spur makes the pinion makes two, so the pinion's teeth will wear down twice as quickly. This assumes the pinion and spur are well meshed and of the same material, but even with a plastic spur and metal pinion, the pinion will wear faster..

[mckrill]

Of course - you are right about that! I haven't noticed wear as a big problem before, rather just ripping of the teeth, but actually on the spur..

[Jahay]

have you had to replace your spur many times already???

neil are you serious? even if using a metal pinion and plastic spur, you will notice more wear on the pinion? NO WAY? ill see what happens when i try it this weekend...

[mckrill]

Hi,

Never had to replace the spur on the savage. I did a BL 1/8 track (quite overpowered) and had to replace the spur a few times - but that's it. Guess I have been lucky.

[Jahay]

my spur hasntneed to be changed, but my pinion has been changed over4timesin the last 15 lipo charges

[suicideneil]

Ever considered a belt drive setup

( I laugh, but one crazy european dude actually built a belt driven Savy or Genesis? transmission into his truck using an un-godly large motor- sort of thing you only see once every few years because its so nuts... ).

[Jahay]

neil if that is aimed at me...? pshh belt driven does sound really really kl and original but not to sure where i would start....

Ill just put in a Centre Diff and see what happens from there. Have you got a link or any old pics of this belt driven savy? would love to see it

[mckrill]

I am about to build a RC Lawnmower - perhaps I can use belt drive there somehow..

I received some new tires yesterday - they are gigantus, not sure if I can gear low enough to not blow the ESC/motor..

[Jahay]

if you could fit a big enough spur you should be good?
Those wheels and tyres are haugee!!