0verkill

iTrader: (8)

Kershaw
Kershaw Designs - Mod 1 Pinions

Fast Lane
Pinions

Saga
8MM Mod 1 Pinions

Minoa

Need more help with servos. Those waterproof servos recommended were light on torque. I plan on running this truck with big tires in snow and wanted a servo up to the job. I've found a couple that have the specs but I'm not sure about the dimensions. A couple I looked at were the Hitec D-840WP and D-845WP and Savox SW-0241MG and SW-0240MG. Would any of these fit? Are servos generally interchangeable regarding dimensions/footprint? I'd rather get something that was way more than needed rather than something that wasn't enough. Thanks again for the help.

Minoa

In regards to shaft size, I went to order that TP 4070 motor and got an option to pick the shaft size. Not sure which one to get.

Zinergy

iTrader: (2)

I believe those 5th scale servos are going to be physically too big.

Here is the size of that first hi-tec in mm 66 x 32 x 62

Here is the size of the Savox I posted in mm which is a full size servo for 10th or 8th scale. 40.6x20.7x42.0. So those 5th scale servos are roughly 30% larger all around.

As for motor shaft bigger is stronger... but it may limit the size of pinion you can run and you might have to order all your pinions online. I know the local stores carry 5mm mod1 not 8mm around here.

Minoa

So I've done some more research and really haven't found many high torque, waterproof servos. I think I've found 2 that will fit the truck. An Xpert 7000 series mega torque waterproof brushless servo and a Protek "black label" 370TBL. What kind of speed am I shooting for here? I'm leaning towards the Protek but it says it's for crawlers, though the speed is quicker than the Xpert. Thoughts?

petmotel

There has already been a suggestion that you post in the Tekno MT 410 thread, and I would like to take the time to explain why this is the proper thing to do.

If everyone that had a question or comment about this vehicle started a new thread, I think you can see the chaos this would create. There would be no central assemblage of information on that vehicle, it would be scattered all over the place. I would like to comment on your servo question, but will not do so here.

Jay

Minoa

Are you saying I can't have a build thread? I read the forum rules and seen nothing the likes of your post suggests.

So after doing more info searching, I think the Protek servo is out. It got not so favorable reviews (of the few threads I could find), as did Protek in general.

Anybody waterproof their own servos? If so, what material did you use? I bought a used Hitec that somebody waterproofed themselves, looks like hell but have never had an issue running it in snow or puddles.

EbbTide

iTrader: (39)

If you can bump your BEC up to 7.4v, then this servo is pretty sweet. I've used just about every series they have and haven't had an issue. Only ones I haven't tried are the 7000 series.

https://www.amainhobbies.com/xpert-6...601-hv/p394372

Zinergy

iTrader: (2)

Full waterproof servos are limited. Most people looking for top end servos generally use them for racing and you don't need waterproof in racing. That's why you see so many fast high trq servos that aren't waterproof.

Why don't you think a .12 servo with over 300oz of trq will be sufficient to move this 10th scale monster truck tires?

vettehigh

iTrader: (3)

Tekno recommends 350oz and over. Better more than less

Zinergy

iTrader: (2)

More is better it's true. But if you really want waterproof for in the standard 10th/8th scale size then your choices are limited. In my experience 300-320oz of trq is more than good to move M/T tires of that size.

If you want more options you might have to go with a non-waterproof model. As long as you don't drive under water a little wetness/snow shouldn't effect the servo.

noel02

You could always waterproof the servo yourself. Wouldn't look as clean, but it'll work.

Minoa

After doing a third round of research, I've found a handful of servos that aren't usually mentioned without digging around. Maybe because they aren't good, who knows. Anyway, here's what I came up with. All are waterproof and all are close to 350 oz of torque or more.

Corally CS-5016 and CS-4014. A race company out of the UK. I found zero reviews for these. Up to 16.5 kg and 14 kg of torque respectfully.

Sanwa/Airtronics ERS-962, ERS-861, and ERS EXT. Don't know the relationship between the two but Airtronics has been around forever. Found few but mostly positive reviews.

Spektrum S6230. Most people said their cheap servos are junk but liked their high end stuff.

So in the end, I ended up ordering a Sanwa ERS-EXT. Specs were the highest of waterproof that I could find. 490 oz and .08/sec at 7.4v. As I mentioned earlier, I wanted something that could turn the biggest tires I could fit on it in snow. I wanted everything to be overkill in this truck. I want zero heat issues.

JonnyP

Where did you order that servo? Thanks for doing the research and relaying the info! Im interested in waterproof servo too but haven't had the time to research. Thank you

0verkill

iTrader: (8)

490 oz-in @ 7.4V should do it.