Need 2-25 tooth 32 pitch, 6mm bore pinion

[J3110]

Woops, meant to say 22-25 tooth...I have yet to see a 2 tooth pinion...what'd that be? a quadralateral?

Learning a lesson the hard way, it seems.
Long story made short, I got one of these guys only to find that it's got a 6mm shaft after the fact(didn't see the shaft dia mentioned in the testemonials and presumed it'd be 5mm).

So, I will be needing to find some 6mm bore pinions...or at least one of them.

I've googled and checked around at the various RC stores that I know of online and can't seem to find what I need, so I am thinking i may need to have one custom made?

This'll be going in my E-maxx presuming I can get some pinions for it.

Already been here: http://www.sdp-si.com/ (found it on runryder heli forum when googling 6mm bore pinion)
Couldn't find what I needed.

I also read somewhere that a mod 0.8 would be roughly equal to a 32 pitch.
Without a crash course in gear geometry can I get a quick yes or no considering my particular application?

[J3110]

Eh, nevermind, I found what I was looking for on the traxxas forum: kershawdesigns makes 32pitch, 6mm bore pinions.
Guess that's hurdle numero uno...not the best start. :|

[lincpimp]

Had no idea kershaw sells the 6mm bore pinions, good info!! Thanks!

Does it have the standard 540 series mounting holes? I think one of the reviews said it was different ...

[lincpimp]

Yep, it has m4 thread holes, and they are 30mm apart. A std 540 mount is m3 holes, and 25mm apart.

[J3110]

Which would be hurdle number three unless I decide to mount it in the E-Revo...I guess they'll mount up using some combination of standard mounting holes in it's motor plate.
If that ends up not being the case, I can always modify the E-Maxx motor plate although I'd rather not.
This motor was originally going in the E-Revo anyways.
Really, it'll just need to last until I get my castle combo, but we all know there's no telling how long that'll be and weather or not it'll work right the first time.
Also, if the 7xl or MM in my E-Maxx goes out, I'll have a spare motor and ESC.
If everything keeps working like it should, the T-Maxx will be getting converted to brushless...finally...

[lincpimp]

The front endbell screws on. I took one of mine off and drilled/tapped the std 25mm motor pattern on it. Not very difficult, you just need an 1/8 drill bit and a m3 tap. Put the holes 12.5mm from the center of the shaft, or 9.5mm from the side of the shaft.

The kb 45 motors are great. I have 4 of them and they make plenty of power and run cool too.

[J3110]

Or I could: just get the right screws. ;)

[brijar]

Could you not just put the motor in a vice (light pressure, with rubber or rag around it to protect it), hook up the ESC and battery and have it spin the shaft slowly (1/4 throttle or so) and use a file to grind it down a bit until you can get a 5mm pinion on easily? That would be how I would do it, except I don't have any 5mm pinions.

Brijar!!!

[lutach]

I'm not 100% sure, but I think 32 pitch is something like 0.8. Here are a few part numbers from https://sdp-si.com/eStore/:

32 Pitch:

S10A6Z-032H024 (24T, Hardened Alloy Steel, 0.25 face width). The bore D. is 0.2498 and some places show it as exactly 6mm, but others have it a tad bit larger (6.3). If it is larger, see if you can find some sort of brass tube that has walls that are 0.04 (roughly 1mm) thick.

0.8 Module:

A 1Y 2MY08020 (20T, 416 Stainless Steel, 6mm face width, no set screw)
A 1C 2MY08020 (20T, Carbon Steel, 6mm face width, no set screw)
A 1Y 2MY08024 (24T, 416 Stainless Steel, 6mm face width, no set screw)
A 1C 2MY08024 (24T, Carbon Steel, 6mm face width, no set screw)
A 1Y 2MY08025 (25T, 416 Stainless Steel, 6mm face width, no set screw)
A 1C 2MY08025 (25T, Carbon Steel, 6mm face width, no set screw)

Find a machine shop and have them put hole(s) for the set screws on the hub.

[lincpimp]

Originally Posted by J3110

Or I could: just get the right screws. ;)

Now that is cool, I had no idea that traxxas would do that. I may have to pick up an ervo mount plate and that motor mount. Kb45 motors are great, and cheap too. A maxx or revo will never put much of a load on one. I run an 8l in a ofna gtp 1/8 onraod car, and it does not even get warm, even geared for 50mph...

[brushlessboy16]

hmm thats pretty neat, traxxas never ceases to amaze

[J3110]

Originally Posted by brijar

Could you not just put the motor in a vice (light pressure, with rubber or rag around it to protect it), hook up the ESC and battery and have it spin the shaft slowly (1/4 throttle or so) and use a file to grind it down a bit until you can get a 5mm pinion on easily? That would be how I would do it, except I don't have any 5mm pinions.

Brijar!!!

That is a fantastic idea. I hadn't even considered using the motor as a lathe, itself.
I'd need some kind of measuring device or method that would ensure a true lathe, though. I guess trying to fit the pinion every so often might work...just work my way in toward the motor.
If anything, I expect to need a larger pinion. Depending on what my choices are, I am hoping I won't have to modify or fabricate anything...not that I am opposed, but wouldn't it be nice?