Shimming K44 axles

[2-shot]

I'm getting ready to build my first real scaler. I purchased a set of K44 axles from another member here on the forum.

What do I need to shim on the K44 axles? I know the pinion gear needs to be shimmed. If I pull out on the pinion shaft a little and spin it, it's really smooth but a lot of backlash between the pinion and ring gear.
If I push the pinion shaft in and spin it, the backlash is minimal, but it feels very rough.

What "feel" am I looking for when I turn the pinion shaft, after the pinion is properly shimmed?
Should it feel a little rough to start, and let the gears "break in" after the rig is ran a bit?

I guess, I'm not quite sure what I'm looking for on a properly shimmed pinion gear.
I apologize for my ignorance, but this is my first scaler build. Just want to make sure it's right!

Thanks in advance for your help!


Sent from my modded Motorola Star Tac.

[1BadJeepBruiser]

Originally Posted by 2-shot

I'm getting ready to build my first real scaler. I purchased a set of K44 axles from another member here on the forum.

What do I need to shim on the K44 axles? I know the pinion gear needs to be shimmed. If I pull out on the pinion shaft a little and spin it, it's really smooth but a lot of backlash between the pinion and ring gear.
If I push the pinion shaft in and spin it, the backlash is minimal, but it feels very rough.

What "feel" am I looking for when I turn the pinion shaft, after the pinion is properly shimmed?
Should it feel a little rough to start, and let the gears "break in" after the rig is ran a bit?

I guess, I'm not quite sure what I'm looking for on a properly shimmed pinion gear.
I apologize for my ignorance, but this is my first scaler build. Just want to make sure it's right!

Thanks in advance for your help!


Sent from my modded Motorola Star Tac.

I use the traxxas shims, you'll want to shim it to bring the pinion gear in to get a good mesh just like any other gear to gear set up. You want only a little bit back lash. Not so tight that its binding. Are the axles used ? I would open them up and use a quality grease as well.

[2-shot]

Originally Posted by 1BadJeepBruiser

I use the traxxas shims, you'll want to shim it to bring the pinion gear in to get a good mesh just like any other gear to gear set up. You want only a little bit back lash. Not so tight that its binding. Are the axles used ? I would open them up and use a quality grease as well.

The axles are new, just used for mock up..

Which Traxxas shims do I use? RC4WD says the shim size is 6mm X 9.8mm.


Sent from my modded Motorola Star Tac.

[micro racer]

I use Traxxas #1985 shims. They are 5x8x.5mm. I will use Team Durango part TD709015 for fine adjustments.

[Rockatanski]

Use toothbrushgel to have a controllook at the wear of the pinion on the ringgear.
Should be in the middle of the ringtooth and pinion.


Sent from planet RC4WD - home of scale

[1BadJeepBruiser]

Originally Posted by Rockatanski

Use toothbrushgel to have a controllook at the wear of the pinion on the ringgear.
Should be in the middle of the ringtooth and pinion.


Sent from planet RC4WD - home of scale

I don't have the parts card on the bag of shuns anymore so I don't recall the part number. I can take a pic of them if it helps you

-Mike

[2-shot]

Originally Posted by 1BadJeepBruiser

I don't have the parts card on the bag of shuns anymore so I don't recall the part number. I can take a pic of them if it helps you



-Mike

Thanks for looking Mike! I think I've found the Traxxas shims. The guy at the hobby shop said it was the only shims Traxxas makes. The are 5 x 9 x .5mm. I got a pack, so I should be all set to start working on my axles!
Thanks for your help, Mike!!


Sent from my modded Motorola Star Tac.

[1BadJeepBruiser]

Originally Posted by 2-shot

Thanks for looking Mike! I think I've found the Traxxas shims. The guy at the hobby shop said it was the only shims Traxxas makes. The are 5 x 9 x .5mm. I got a pack, so I should be all set to start working on my axles!
Thanks for your help, Mike!!


Sent from my modded Motorola Star Tac.

No problem dude