RCCrawler Forums

BritCrawler · 08-26-2008, 05:39 AM

I've bumped the voltage on my AX-10 up to 9.9v (3S1P A123 pack) and now I'm having trouble with too much wheel speed. I've been advised to 'Volt up, gear down' by a friend of mine (he's stateside and he's a good mate who knows his onions) so I need to gear it down a bit to overcome the problem, it seems. It should also give me added torque, I guess?

The problem is I'm struggling a bit. I've been looking for a smaller pinion and/or a larger spur gear. The problem is they are 48 Pitch gears no the usual 32 Pitch that most electric r/c cars use.

I found a 12T pinion i n the UK, anything smaller I would have to source over there.

Just wondered if any of you folks knew which 48 Pitch Spur gears will fit an AX-10?

A fellow UKRCRC guy suggested Robinson Racing spur gears. Any idea of these fit?

Speedracer19 · 08-26-2008, 06:11 AM

Any spur gear that has the "ball" holes in it will work. Kimbrough has gears that will work. You can run up to a 90T spur on a stock AX10 tranny.

Scottmisfits · 08-26-2008, 06:22 AM

And just so you know, almost all 1/10 scale electric cars are using 48pitch. Some of the touring cars are using as fine as 64 pitch. The 32pitch stuff is the 1/10 Nitro and the 1/8 conversions, and the Traxxas monster trucks, nitro and electric.

Robinson racing and Kimbrough both have great quality stuff that will get you through.

JohnRobHolmes · 08-26-2008, 06:50 AM

You could certainly convert to 32p gears as well.

Sounds like your mate does know his onions

BritCrawler · 08-26-2008, 06:52 AM

What exactly do you mean by 'ball' type holes? Do you have a picture of a typical example?

Quote:

Originally Posted by JohnRobHolmes

You could certainly convert to 32p gears as well.

If they are not the 'common' type I'd rather not, I'm sure there is something out there that'll do it at 48dp.

Quote:

Originally Posted by JohnRobHolmes

Sounds like your mate does know his onions

He does, and he's a nice guy with it

The spur gear thing is looking promising. Why can't you fit anything bigger than 90T on a stock Axial? Is the motor plate not 'big' enough to accommodate anything larger?
87T vs. 90T isn't that big a step on the spur side (as opposed to 14T -> 12T on a pinion which is, for example)

Narly1 · 08-26-2008, 07:51 AM

Quote:

Originally Posted by BritCrawler

Why can't you fit anything bigger than 90T on a stock Axial?

If you try to run anything larger you will run into a clearance issue between the spur and your driveshaft yoke.

Narly1

Speedracer19 · 08-26-2008, 07:55 AM

"Ball" type is the kind of gear that you could put diff balls in, I.E. straight axle (Oval) or On-Road. the reason that you can only go up to 90T is the spur gear will hit the outdrive, unless you go with a aftermarket set of output shafts like the CDW's that are in the vendor section (yotachump A+).

BritCrawler · 08-26-2008, 08:38 AM

By 'ball' type I assume you mean these?

They are Kimbroughs.

Kimbrough only do an 89T and a 91T. I'll take a look and see if Robinson Racing do a 90T.

chracing · 08-26-2008, 08:48 AM

If you still have good slow speed control and torque, I would leave it as is. Your extra wheel speed will help at times. If you have lost your slow speed throttle control and torque, you will have to gear down. You can get pinions down to 7 tooth if you don't want to change the spur gear.

XPLORx4 · 08-26-2008, 09:34 AM

This may be a dumb question, but what motor are you using?

Timmahh · 08-26-2008, 09:47 AM

also what radio.

my neighbors have 2 axials each, one ran on a Speky DX3 DX3.0 and one each ran with the nomadio react.
the units ran by the reacts have a much more linear flow when you first pull the trigger, that is to say they start out very slow and the motors speed up as you pull more trigger. the Speky drove units, are very tough to get moveing slow, when you give the trigger, just a small squeeze, they want to take off alot faster, usually sliding to the side or off a log bridge as the case may be.

you can try to slow down the take off speed (if this is what your issue is) by adjusting the Expo on the t/b channel, or slowind down the servo speed if your radio has this adjusments.

BritCrawler · 08-26-2008, 10:02 AM

Integy 55T Motor, Sidewinder ESC, Acoms AM radio set. It's not a superb radio set, I'll admit, I am going to replace it with a DX-6.

My point is non of it has changed apart from the battery voltage, and now it's not as drivable as it was.

Speedracer19 · 08-26-2008, 10:27 AM

Quote:

Originally Posted by BritCrawler

By 'ball' type I assume you mean these?

They are Kimbroughs.

Kimbrough only do an 89T and a 91T. I'll take a look and see if Robinson Racing do a 90T.

That's them mate. That type of spur gear in 48P will work on the AX10 tranny with or with the slipper

BritCrawler · 08-27-2008, 07:07 AM

Found out the HPI Wheely King uses 48DP spurs that fit half the HPI cars they make, so there's a good chance they will fit an Axial, maybe. The good thing is I have a WK also so I can pop the spur off and see if it fits the Axial.

Wish me luck

BritCrawler · 08-27-2008, 12:49 PM

No dice, the hole pattern on HPI ones is wrong. Rats...

BritCrawler · 09-09-2008, 06:56 AM

A few of you guys here probably already know about these but I thought I'd follow this thread up as I have some shiny new parts here from the USA.

Exhibit A:

This is a set of Hot Racing pinion gears, specifically designed with Rock Crawling in mind, in 48dp. As you can see they come colour coded and labelled from 12T down to 9T. I'm assuming that big round lump is a motor spacer to push the motor back in case the shank at the back doesn't clear the spur gear.

Pretty neat stuff, eh?

Exhibit B:

To go with it I have a Hot Racing 48dp 89T Spur Gear made in Aluminium.

I'll let yous guys know how it goes once I've fitted em tonight

If you are interested in them I got them from LiquidRC. Very quick service even overseas.

CrawlinClodKiller · 09-09-2008, 09:47 AM

I use an integy 55t with sidewinder, 11.1volt, geared at 87 spur 15 tooth pinion. Great combo. Good wheelspeed and enough torgue to break parts if I am careless.

PipeDreams · 09-09-2008, 01:39 PM

Quote:

Originally Posted by Speedracer19

Any spur gear that has the "ball" holes in it will work. Kimbrough has gears that will work. You can run up to a 90T spur on a stock AX10 tranny.

Funny cause I have a 93 on my stocker right now. But if you opened your yokes to much to fit the joint in then it will rub if you did it right then it'll work!

With more gear trust me it'll go nice and slow for you. I love my gear... more control and way more torque

Mic · 09-09-2008, 01:44 PM

This may be obvious but you do not have to drive wide open all the time. If it is to fast just give it less gas

BritCrawler · 09-09-2008, 02:49 PM

I did try moving the throttle curve on the ESC (CC Sidewinder) to make it a little less speed happy but the fine control I used ot have was all gone and I couldn't drive it nearly as well. Having the really low speed at low throttle suits my style better, I do have a blip set on my controlls so if I stick it all the way forwad it'll gimme a burst of wheel speed.

Something I noticed is now I am running metal to metal it's really loud and whiney. I greased the gears up well and checked the mesh using the old fashioned piece of paper trick. It all looks a-okay. Is the noise normal?

Also do you recommend a slipper clutch now I have a metal spur?

08-26-2008, 05:39 AM	#1
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	Volt up, gear down? I've bumped the voltage on my AX-10 up to 9.9v (3S1P A123 pack) and now I'm having trouble with too much wheel speed. I've been advised to 'Volt up, gear down' by a friend of mine (he's stateside and he's a good mate who knows his onions) so I need to gear it down a bit to overcome the problem, it seems. It should also give me added torque, I guess? The problem is I'm struggling a bit. I've been looking for a smaller pinion and/or a larger spur gear. The problem is they are 48 Pitch gears no the usual 32 Pitch that most electric r/c cars use. I found a 12T pinion i n the UK, anything smaller I would have to source over there. Just wondered if any of you folks knew which 48 Pitch Spur gears will fit an AX-10? A fellow UKRCRC guy suggested Robinson Racing spur gears. Any idea of these fit?

08-26-2008, 06:11 AM	#2
Speedracer19 Rock Crawler Join Date: Apr 2008 Location: Highlands Ranch, Co. Posts: 852	Any spur gear that has the "ball" holes in it will work. Kimbrough has gears that will work. You can run up to a 90T spur on a stock AX10 tranny.

08-26-2008, 06:22 AM	#3
Scottmisfits Rock Crawler Join Date: Apr 2008 Location: Calgary Posts: 913	And just so you know, almost all 1/10 scale electric cars are using 48pitch. Some of the touring cars are using as fine as 64 pitch. The 32pitch stuff is the 1/10 Nitro and the 1/8 conversions, and the Traxxas monster trucks, nitro and electric. Robinson racing and Kimbrough both have great quality stuff that will get you through.

08-26-2008, 06:50 AM	#4
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	You could certainly convert to 32p gears as well. Sounds like your mate does know his onions

08-26-2008, 07:55 AM	#7
Speedracer19 Rock Crawler Join Date: Apr 2008 Location: Highlands Ranch, Co. Posts: 852	"Ball" type is the kind of gear that you could put diff balls in, I.E. straight axle (Oval) or On-Road. the reason that you can only go up to 90T is the spur gear will hit the outdrive, unless you go with a aftermarket set of output shafts like the CDW's that are in the vendor section (yotachump A+).

08-26-2008, 08:38 AM	#8
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	By 'ball' type I assume you mean these? They are Kimbroughs. Kimbrough only do an 89T and a 91T. I'll take a look and see if Robinson Racing do a 90T.

08-26-2008, 08:48 AM	#9
chracing Rock Stacker Join Date: Jun 2008 Location: So. Cal. Posts: 72	If you still have good slow speed control and torque, I would leave it as is. Your extra wheel speed will help at times. If you have lost your slow speed throttle control and torque, you will have to gear down. You can get pinions down to 7 tooth if you don't want to change the spur gear.

08-26-2008, 09:34 AM	#10
XPLORx4 Quarry Creeper Join Date: Jul 2008 Location: Galt Posts: 282	This may be a dumb question, but what motor are you using?

08-26-2008, 09:47 AM	#11
Timmahh RCC Addict Join Date: Jun 2008 Location: Mudville Posts: 1,592	also what radio. my neighbors have 2 axials each, one ran on a Speky DX3 DX3.0 and one each ran with the nomadio react. the units ran by the reacts have a much more linear flow when you first pull the trigger, that is to say they start out very slow and the motors speed up as you pull more trigger. the Speky drove units, are very tough to get moveing slow, when you give the trigger, just a small squeeze, they want to take off alot faster, usually sliding to the side or off a log bridge as the case may be. you can try to slow down the take off speed (if this is what your issue is) by adjusting the Expo on the t/b channel, or slowind down the servo speed if your radio has this adjusments.

08-26-2008, 10:02 AM	#12
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	Integy 55T Motor, Sidewinder ESC, Acoms AM radio set. It's not a superb radio set, I'll admit, I am going to replace it with a DX-6. My point is non of it has changed apart from the battery voltage, and now it's not as drivable as it was.

08-27-2008, 07:07 AM	#14
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	Found out the HPI Wheely King uses 48DP spurs that fit half the HPI cars they make, so there's a good chance they will fit an Axial, maybe. The good thing is I have a WK also so I can pop the spur off and see if it fits the Axial. Wish me luck

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08-27-2008, 12:49 PM	#15
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	No dice, the hole pattern on HPI ones is wrong. Rats...

09-09-2008, 06:56 AM	#16
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	A few of you guys here probably already know about these but I thought I'd follow this thread up as I have some shiny new parts here from the USA. Exhibit A: This is a set of Hot Racing pinion gears, specifically designed with Rock Crawling in mind, in 48dp. As you can see they come colour coded and labelled from 12T down to 9T. I'm assuming that big round lump is a motor spacer to push the motor back in case the shank at the back doesn't clear the spur gear. Pretty neat stuff, eh? Exhibit B: To go with it I have a Hot Racing 48dp 89T Spur Gear made in Aluminium. I'll let yous guys know how it goes once I've fitted em tonight If you are interested in them I got them from LiquidRC. Very quick service even overseas.

09-09-2008, 09:47 AM	#17
CrawlinClodKiller Rock Crawler Join Date: Dec 2005 Location: West Omaha Posts: 581	I use an integy 55t with sidewinder, 11.1volt, geared at 87 spur 15 tooth pinion. Great combo. Good wheelspeed and enough torgue to break parts if I am careless.

09-09-2008, 01:44 PM	#19
Mic Rock Crawler Join Date: Mar 2008 Location: Arizona Posts: 578	This may be obvious but you do not have to drive wide open all the time. If it is to fast just give it less gas

09-09-2008, 02:49 PM	#20
BritCrawler Pebble Pounder Join Date: Jun 2008 Location: UK Posts: 137	I did try moving the throttle curve on the ESC (CC Sidewinder) to make it a little less speed happy but the fine control I used ot have was all gone and I couldn't drive it nearly as well. Having the really low speed at low throttle suits my style better, I do have a blip set on my controlls so if I stick it all the way forwad it'll gimme a burst of wheel speed. Something I noticed is now I am running metal to metal it's really loud and whiney. I greased the gears up well and checked the mesh using the old fashioned piece of paper trick. It all looks a-okay. Is the noise normal? Also do you recommend a slipper clutch now I have a metal spur?

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