How to fix the worm gear issue!!

[Yawzer]

WOW - some great posts - lot's of good thoughts - so I guess the bottom line is - I will be the test case & try my idea - I don't have my Losi yet, which is why I did not post any pics. I will try it with the drill in 5 minute increments & take it apart to see how it worked & take close up's to post here. Worse case - I will need some replacements, but worth a try. I should have my Losi sometime in the next few days - stay tuned.

 

[bustedcrawler]

Mine was supposed to be here today, but got held up somewhere and now it will be Wed. Talking with the RC guy, he suggested toothpaste as that is an old rc trick too not just biking. So I will try that, with a drill, then an old stock slash motor to break everything in. Then I will swap in the real motors :lol:

 

[Yawzer]

I've tried toothpaste - too gritty - rubbing compound has a much finer grit and is designed for polishing - good idea tho.

 

[Grizzly4x4]

WOW - some great posts - lot's of good thoughts - so I guess the bottom line is - I will be the test case & try my idea - I don't have my Losi yet, which is why I did not post any pics. I will try it with the drill in 5 minute increments & take it apart to see how it worked & take close up's to post here. Worse case - I will need some replacements, but worth a try. I should have my Losi sometime in the next few days - stay tuned.

I can't believe you didn't mention in your first post that you have not tried this and don't have a LCC yet.

 

[Rockcrawler]

I can't believe you didn't mention in your first post that you have not tried this and don't have a LCC yet.

Why? Did you try this with your clod axles? Maybe this would work for my bergs...........

:lmao:

 

[Grizzly4x4]

Why? Did you try this with your clod axles? Maybe this would work for my bergs...........

:lmao:

Yeah, I didn't realize what forum this was in and I tried it on all my rigs already. :ror:

 

[Rockcrawler]

Yeah, I didn't realize what forum this was in and I tried it on all my rigs already. :ror:

:lol: Did it work? Maybe a little too good?


Ok, back on topic......yeah, that was stupid to not mention he has not tried it yet. :roll:

 

[microgoat]

Very good points, sounds like an aftermarket upgrade huh?

Do work, son.

The ring gear doesn't have to be helical cut, as long as there is enough room between the teeth for the worm's helical cut tooth to fit, it will work. It's just that the worm system is not as efficient at transmitting power, plus the thrust forces applied to the worm don't help either. The helical cut ring gear makes for a tighter fit, but what might happen is the straight cut ring gear might get sloppy/loose faster than a helical cut one. Just needs high pressure/high heat grease, heat shouldn't be too much of an issue.

Sure it'll work, but we'd rather have something that works well, yes?

I understand the inherent inefficiency, but I think there's more than that going on. We're seeing motor and axle temps that are unsustainable. There's no good reason you should thermal an ESC on a crawler.

Somebody who owns one of these rigs, please pull a driveshaft and spin the diff input by hand. I'd like to know how hard it is to turn compared to, say, an Axial or TLT. Properly designed and set up, the input should spin freely, and I'm guessing that isn't the case with the Losi. There are millions of worm gears in daily use in industrial applications, and I'm sure they don't run at plastic-melting temps or use cooling systems.

 

[wrightcs77]

Do work, son.



Sure it'll work, but we'd rather have something that works well, yes?

I understand the inherent inefficiency, but I think there's more than that going on. We're seeing motor and axle temps that are unsustainable. There's no good reason you should thermal an ESC on a crawler.

Somebody who owns one of these rigs, please pull a driveshaft and spin the diff input by hand. I'd like to know how hard it is to turn compared to, say, an Axial or TLT. Properly designed and set up, the input should spin freely, and I'm guessing that isn't the case with the Losi. There are millions of worm gears in daily use in industrial applications, and I'm sure they don't run at plastic-melting temps or use cooling systems.

I have 2 axles sitting here with no driveshafts on them; 1 Axial and 1 Losi. Had a ton of time on the Axials, have a few batteries and 1 smokey motor on the Losi. Both are pretty darn free, neither feels like there is any real drag.

 

[Speedracer19]

One thing i found is taking a shim from each side of the spool helps a good bit. I started a thread here:
http://www.rccrawler.com/forum/showthread.php?t=181567
maybe one of you guys have some insite?

 

[929freak]

for you guys talking about grease guns... A chain saw tip greaser would be
Perfect. It's basically a small thumb operated grease gun for putting grease
In the 3mm hole at the tip of the bar on bigger saws,and you can fill it with whatever grease you want. Just an idea

 

[929freak]

Found out where we get the "grease guns". Sherrilltree.com
Go to the tools section, then lubricants. $23.00.

 

[torn body]

Nice little grease gun I have one and they work great. They can also be found at better parts stores along with flush type grease fittings.

 

[some87]

I've tried toothpaste - too gritty - rubbing compound has a much finer grit and is designed for polishing - good idea tho.

where do you get the rubbing compound from?

 

[husky385]

for you guys talking about grease guns... A chain saw tip greaser would be
Perfect. It's basically a small thumb operated grease gun for putting grease
In the 3mm hole at the tip of the bar on bigger saws,and you can fill it with whatever grease you want. Just an idea

husky385= Husqvarna XP385

I fell timber for a living. I use the plastic one that comes with new Husqvarna chain saw. I use it along with a round bottom plastic measuring spoon to grease the the shielded bearings in my 450 size helicopter. Simple and free. I would post pics, don't have a star yet.
Kevin

 

[Speedracer19]

where do you get the rubbing compound from?

You may be able to use valve lapping compound. You can get this a auto parts stores.

 

[hbj069]

turkey's

not tryin to take away from the grease gun idea, I thought of using one of my old turkey injectors and drilling a small hole thru the diff housing case, fill it, cap it off with a dab if silicone to keep the dirt out and roll on. Real easy to keep lubed!!

 

[husky385]

One thing I did was drill and tap a 3mm hole in the cases so I can squirt in some grease from time to time. That maybe an option for the Losi axles as well.

This looks to be the best method to keep the worm drive well lubed.8) This is what I will do."thumbsup"
Kevin

 

[husky385]

Just a thought, If you use one like the bar tip greaser if you push the grease in under pressure do it sparingly you could have grease oozing out of the axle everywhere.
Kevin

 

[fwilly]

Somebody who owns one of these rigs, please pull a driveshaft and spin the diff input by hand. I'd like to know how hard it is to turn compared to, say, an Axial or TLT. Properly designed and set up, the input should spin freely, and I'm guessing that isn't the case with the Losi. There are millions of worm gears in daily use in industrial applications, and I'm sure they don't run at plastic-melting temps or use cooling systems.

They spin very easily without load. If you put a little load on it, then it becomes hard to get past static friction.