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02-07-2013, 06:59 PM | #1 |
Newbie Join Date: Feb 2013 Location: Sanford
Posts: 1
| Pinion & Spur Gears for SCX 10
Hi -- My first post. I just bought an Axial SCX 10 and have run it around the wooded back yard. Runs great! Lots of fun! But too fast, since I also intend to use it for a couple of grand children, 5 and 7 years old. I think a top speed about half of stock would be about right. Instruction Manual by Axial has great line drawings but not much actual information. Towards the back there is a Gear Ratio chart which I find confusing. Are the pinion numbers, 10-35, and spur numbers, 70-96, the number of teeth? What significance does "48 pitch" at the top have? Seems to me that spurs and pinions go together as pairs because the shaft center lines are constant. Yet the chart does not seem to list these gears as pairs. Likely there is an explanation of all this in one of the forums, but I have not found it. Can someone explain to me or tell me where to look? Finally, to cut to the chase, where should I go to buy gears for the SCX10 and what whould I order to cut top speed to about half? Thanks for your help. Regards. -Gary |
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02-09-2013, 12:55 AM | #2 |
RCC Addict Join Date: Oct 2011 Location: British Columbia
Posts: 1,487
| Re: Pinion & Spur Gears for SCX 10
Welcome to the forums. Your choice of an Axial rig is a good one. A very solid platform with a ton of aftermarket parts available most anywhere. Your SCX10 should have come with a 20T pinion and an 87T spur gear. I'm not sure you or your grandkids would be real happy with half speed. I might suggest just changing out the pinion to a 12 or 13T and see if that fits your comfort level. If you would like to keep the spur cover (if it has one), you're pretty well limited to the 87T. I'm not sure anything larger would fit under the cover. Yes the listing for spur/pinions in the manual is a tooth count and the 48 pitch is standard on the SCX10 and many other RC vehicles. Some buy 32 pitch (coarser teeth) spur and pinion for extra strength, but I don't think it's necessary for a trail rig. 48P is a lot quieter as well. You should be able to find 48P pinions at most hobby stores and certainly the online ones that deal in RC cars/trucks. As a side note, you'll need a pinion to fit a .125" motor shaft. Good luck with your new truck and if there are further questions, please ask away. |
02-09-2013, 04:53 AM | #3 | |
Proverbial threadkiller Join Date: Feb 2011 Location: Central Wisconsin
Posts: 1,453
| Re: Pinion & Spur Gears for SCX 10 Quote:
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02-10-2013, 02:30 PM | #4 |
I wanna be Dave Join Date: Jun 2008 Location: Vermont
Posts: 2,016
| Re: Pinion & Spur Gears for SCX 10
Easiest thing you could possibly do depending on the radio you're using is dial back the Throttle % or EPA to under 125 or 100 or whatever the setting may be. Then in an instant you can return it to full power for yourself or what not without changing gears.
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