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-   -   Anyone know what pitch Xmods pinion is? (http://tinyrc.com/forums/showthread.php?t=15807)

crazydave 12-02-2003 10:16 PM

Anyone know what pitch Xmods pinion is?
 
Is it 48 pitch like the Mini-Z?

Will a pinion like this work?
http://www.hobbyetc.com/cgi-bin/item.cgi?part_id=5871

hotrod29728 12-03-2003 09:28 AM

no you cannot use that gear besides if you add another 3 or 4 dollars you can get a stage two kits from RS

stl2ner 12-03-2003 02:41 PM

they mini z pinions are too long and are smaller, I have a twelve tooth mini z gear and it is only as big as my nine tooth pinion.

crazydave 12-03-2003 05:41 PM

Yeah I have the stage 2 set. I'm thinkin for trying other motors, and I don't want to end up messing things up trying to yanking those brass pinions off over and over.

Ok so it's not 48 pitch like the mini-z, does anyone know if it's 32 pitch or is it some oddball pitch then?

...and thanks for any info you might have.:D

hotrod29728 12-03-2003 06:58 PM

more than likely its a 32 but it could be an oddbal and be like a 20 somethin..........just my 2cents worth

crazydave 12-08-2003 09:31 AM

I think I found a possible replacement pinion.

http://www2.towerhobbies.com/cgi-bin...?&I=LXEMZ9&P=7

I'll probably order a couple to check out.

neurokinetik 12-08-2003 09:50 AM

Seems a bit expensive. For that much, I'd stick with sacrificing stage 1 motors. I'd want to see one that isn't press fitted.

neurokinetik 12-09-2003 10:04 PM

I saw 42 pitch pinions available for the Micro RS4. It might be what we need, though they were $8.00 each, so I'm hesitant to try one. They are titanium, and not press-fitted.

http://www.hobbyetc.com/cgi-bin/cata...at=187&man=all

Cyfiawnder 12-10-2003 12:06 AM

I use an 11 tooth 48 Pitch Slot car pinion with the RED drag Drive gear in my XMOD with no problem. Pinion cost $2 US from "Trains and Lanes" it's a hobby store. But I'm sure any Slot car type place will have these gears. The Pinion puller cost more at $9

SEE MY POST ABOUT THE NURELCO BEARD SHAVER MOTOR

neurokinetik 12-10-2003 12:50 PM

Quote:

Originally posted by Cyfiawnder
I use an 11 tooth 48 Pitch Slot car pinion with the RED drag Drive gear in my XMOD with no problem.
But is it actually the same as the XMods pinion, or is it just "close enough." Because "close enough" doesn't cut it when you are trying to reduce drivetrain losses to the bare minimum.

Can you post a pic next to the stock 11 tooth pinion for comparison?

Cyfiawnder 12-10-2003 02:18 PM

Sorry I can't post pics, no Digital camera. only difference I see between the stage 2 11 tooth and the 11 tooth I bought from a hobby store, is the Stage 2 is longer by at least 1/16" and the stage 2 pinion is brass. The one I have is steel. I do have a 12 tooth brass pinion but it's a little chewed up, and I didn't want to chance it....

TypeZer0 12-14-2003 03:03 PM

found this page: http://www.schafergear.com/chicagogear/gear_info.html

there's a formula to determine the diametrical pitch.
P = (N + 2) / OD where P = pitch, N = number of teeth, OD = outer diameter in inches.

using my stock motor, i've found this:
N = 8, OD = 6 mm = 0.2362 inches
P = (8 + 2) / 0.2362 = 42.337002540220152413209144792549
or 42 pitch.

now all we need are some cheap non press fit 42 pitch pinions

neurokinetik 12-14-2003 03:20 PM

I saw that page, or one like it... that's how I came to the conclusion that XMods use around 40 pitch.

I've ordered a couple of the ridiculously expensive titanium 42 pitch pinions. If they work, it also opens up the possibilities of taller gear ratios, as they are available in 13, 14, and 15 tooth, as well as 10 and 11.

TypeZer0 12-14-2003 04:24 PM

i looked through all of towerhobbie's pinions and found no 42 pitch pinion and even if they did, it wasn't specified in many of the pinions i saw that looked like it would work


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