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Thread: How to do the narrow XR10 mod to Axial axles

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Old 06-06-2012, 09:03 AM   #1
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Default How to do the narrow XR10 mod to Axial axles

So, I've been asked many times how to do this. I've been meaning to do this thread for awhile and finally got some pictures taken last night. Here it goes.....

You start with plastic axle housings, a set of XR10 universals, some aluminum "C"'s, aluminum knuckles, a good locker, and some short beef tubes. The beef tubes should be .43"OD by 1.9" long with a .2" hole bored through it. This will reinforce the axle housing and give you something to drill and tap into to hold the "C" on. I prefer the tubes to be made of Delrin or aluminum.

Other tools you'll need are:

Dremel
Drill
3mm tap
Xacto knife
File

So let's get started.

First thing to do is remove the round boss from the outside of the housings where the stock "C"'s attach.



These should all be cut down flush with the outside of the housing.



Then you remove part of the housing where the halves come together. The object is to make the squared off ridges into small triangles so that the "C"'s will slide over them and you can clock them.

The top drawling is how the housings are stock, the bottom is how you want them to look.



The next step is to take your Dremel and smooth out the inside of the housing at the ends so the beef tube fits in nice and tight but the housing completely comes together.







You should be able to put an 5x11 bearing in the end of the housing, place the beef tube in and close the housing without seeing any gaps where the housing comes together. Just for fun, slide the "C" on now to see how the fit is, it should be tight.





So now that you have both sides done and the "C"s fit nice it's time for the lockers and axle mods. I prefer the Hot Racing spool lockers.



I've never had one fail, they are very hard metal, and the slot where the axle engages is a nice tight fit.

So this is the tricky part. You are going to be cutting the axle shafts down at the locker end right past where the axle necks up and the flat spots are. I leave 1/8" of the larger diameter when I cut mine down.





When cutting, go nice and slow, don't get them really hot, you don't want to remove the heat treating right where they engage the lockers. After cutting, you use a file and make new flats until they just slide into the lockers.

After you file the flats, you must make sure they seat all the way into the locker. Assemble the "C"s, knuckles, bearings, and universals and make sure everything fits together nice.

Once you get the "C"s clocked properly, remove the universals and drill a #39 hole and tap it out to 3mm to secure the "C" to the axle and beef tube on top and bottom.

Reassemble the axle and you're done. They should look something like this.



This mod will allow more steering, it will be stronger than most CVD's (other than Super 300's) and will widen the track width approximately 1/2" overall.

Last edited by War Pig; 06-06-2012 at 10:40 PM.
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Old 06-06-2012, 07:07 PM   #2
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Default Re: How to do the narrow XR10 mod to Axial axles

Awesome right up War Pig...best I've seen on this mod. Thanks for taking the time to do it!

Edit-did you machine these yourself or purchase them? I have only seen the creationfab ones that require the ends of the housing to be cut off.
Thanks

Last edited by Mr.Joshua; 01-18-2013 at 10:01 PM.
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Old 06-06-2012, 07:18 PM   #3
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Default Re: How to do the narrow XR10 mod to Axial axles

Yea defineitley. Thanks.
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Old 06-06-2012, 10:24 PM   #4
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Default Re: How to do the narrow XR10 mod to Axial axles

Quote:
Originally Posted by Mr.Joshua View Post
Awesome right up War Pig...best I've seem on this mod. Thanks for taking the time to do it!

Edit-did you machine these yourself or purchase them? I have only seen the creationfab ones that require the ends of the housing to be cut off.
Thanks
I made them on my lathe. I'm sure Chris could make some up real easy for you guys.

Updating the original post.
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Old 06-06-2012, 10:50 PM   #5
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Default Re: How to do the narrow XR10 mod to Axial axles

The standard length beef tubes should work right?
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Old 06-07-2012, 12:01 AM   #6
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Default Re: How to do the narrow XR10 mod to Axial axles

Quote:
Originally Posted by War Pig View Post
So, I've been asked many times how to do this. I've been meaning to do this thread for awhile and finally got some pictures taken last night. Here it goes.....

You start with plastic axle housings, a set of XR10 universals, some aluminum "C"'s, aluminum knuckles, a good locker, and some short beef tubes. The beef tubes should be .43"OD by 1.9" long with a .2" hole bored through it.

you say .2" hole.
what size drill bit is that?
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Old 06-07-2012, 12:29 AM   #7
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by snail78 View Post
you say .2" hole.
what size drill bit is that?
A #7 drill is .201 diameter.
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Old 06-07-2012, 07:37 AM   #8
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by Shinjari View Post
The standard length beef tubes should work right?
If it's 1.9" long then yeah.

Quote:
Originally Posted by snail78 View Post
you say .2" hole.
what size drill bit is that?
I think I use a #5. Basically it needs to be a bit bigger than the OD of the Axial universal axleshaft.
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Old 06-07-2012, 10:26 AM   #9
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Default Re: How to do the narrow XR10 mod to Axial axles

What do you do to widen the rear now? And where are those tabs that you make into triangles?
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Old 06-07-2012, 10:49 AM   #10
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by 04sti20 View Post
What do you do to widen the rear now? And where are those tabs that you make into triangles?
They are at the end of the axle housing halves.

When you put the housing together there is a very small and elevated tab on the top and bottom of each half to make that larger tab/lip that you need to file down to look like those triangles.

The scx10 knuckles have a small notch for it to slide over and hold at the proper angle.
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Old 06-07-2012, 03:25 PM   #11
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by 04sti20 View Post
What do you do to widen the rear now?
If you want to widen the rear, use wider hexes or different offset hubs. I keep mine a bit narrower than the front.....easier to sneak through gates that way
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Old 06-07-2012, 03:56 PM   #12
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Default Re: How to do the narrow XR10 mod to Axial axles

Standard beef tubes work. That's what I use. I like the additional weight in the axles they provide. I'd also recommend using Felsenfest no slop spools.
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Old 06-07-2012, 04:46 PM   #13
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Default Re: How to do the narrow XR10 mod to Axial axles

Does anyone know if the Wraith axles can be cut down as well to work? Is the short side axle long enough?

I have leftover plastic Inner C's and outer knuckles from my Wraith. Would they be strong enough for an abused 1.9 truck?

How are you all making sure your flats for the locker are actually flat, parrallel, and equally off center?

Seems like this is a somewhat affordable way to gain strength and steering angle.
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Old 06-07-2012, 06:19 PM   #14
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by meatmonkey View Post
Is the short side axle long enough?
Interestingly, the short side Wraith universal is the same length as the short side XR10 universal. Not sure about the solid rears.
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Old 06-07-2012, 09:05 PM   #15
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by Solitaire View Post
Interestingly, the short side Wraith universal is the same length as the short side XR10 universal. Not sure about the solid rears.
Not sure how you figured that but the XR10 universals are both the same length and longer then the short wraith side. Maybe you were referring to the cut XR10 axle needed for this mod?
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Old 06-28-2012, 07:16 PM   #16
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This is my tire at full lock with stock scx10 stuff. It rubs the shock at full lock and when its stuffed.

Will doing this mod make this worse or require me to get some wheel spacers or new offset wheels?

EDIT: Well I see this will make the track width 1/2" wider. Hopefully thats enough to clear it.

Last edited by Shinjari; 06-29-2012 at 08:04 AM.
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Old 06-28-2012, 11:25 PM   #17
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Default Re: How to do the narrow XR10 mod to Axial axles

So the narrow mod make the axle wider? Oo
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Old 06-29-2012, 12:24 AM   #18
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by MG200 View Post
Not sure how you figured that but the XR10 universals are both the same length and longer then the short wraith side. Maybe you were referring to the cut XR10 axle needed for this mod?
Well, I don't know what I received, but in the pic below, the package is a Wraith set and the two loose ones are what I received as an XR10 set.

As you can see, the shorter XR10 uni is identical to the short Wraith. Didn't matter to me at the time as I only needed the longer XR10 ones for an extended axle build.

Maybe there was a packaging mixup and I don't have an XR10 to compare. Weird.

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Old 06-29-2012, 08:14 AM   #19
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Default Re: How to do the narrow XR10 mod to Axial axles

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Originally Posted by Solitaire View Post
Well, I don't know what I received, but in the pic below, the package is a Wraith set and the two loose ones are what I received as an XR10 set.

As you can see, the shorter XR10 uni is identical to the short Wraith. Didn't matter to me at the time as I only needed the longer XR10 ones for an extended axle build.

Maybe there was a packaging mixup and I don't have an XR10 to compare. Weird.


Dont think you got a XR-10 set of axles. The XR-10's are the same length.
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Old 06-29-2012, 09:40 AM   #20
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Default Re: How to do the narrow XR10 mod to Axial axles

Equal length is correct. AX30563. This is a really nice write up on the narrow install, but I'm trying to relate it to the full-axle install. It seems both techniques widen the front track about 1/2" so I have to conclude that they use different wheel offsets to come out about the same. The narrow install must use AX10 offset wheels and the wide install must use XR10 offset wheels. Or am I missing something? Anyone have a link to a similarly well-written full-axle XR10 steering conversion?
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