Amount of Servo torque - What would you consider the best for...
 

I thought about putting one of these in each of the individual forums and ask the same question over for each of my RCs. That wouldn't work well with all the collective knowledge being here in the General Discussion forum and some of you never visiting the lonely halls of the Jato forum. :whistle: I've often wondered if I am buying enought servo and end up with the highest torque I could get. Some call that overkill others call it security. If I could of bought 2 servos that would of done the job for the price I paid for the one. Then it's just wasting money. My pockets are not as deep these days so I can't just keep running out and buying the highest torque servo.

So if you got a minute to put down what you think would work for minimum. I guess we all want the best so put down what you think would be the best or optimal amount of torque for a steering servo. There's Futaba, HiTec, JR servo fans in here and we all are loyal to them. So that why I was just curious about the amount of torque for a servo.

I'm not sure if I got sections right below. If not I would appreciate a correction, subtraction, or addition. Thanks for sharing this it's going to help me out a lot and will be one of those threads I go back and look at before I buy another servo and hopefully a lot of others too.

Let me know if there is some other information I can look up to add to this thread that would be helpful to others also or make the question easier on you all. I don't mind at all doing some more research if it can make this more useful or less like a tax form.

I guess to standardize it somewhat lets go with 6v for the servo.

1/10th scale 2 wheel drive (RC10GT, Rustler, Jato)




1/10th scale mini-truggy 4wd (crt.5, ls10, DST)




1/8th Buggy 4wd




1/8th Truggy - Muggy



E-Maxx - Revo - Savage - LST (Single servo setups)
Where do you put these guys? Not familiar enought with the LST or Savage and have never figured out how they call the Revo or Emaxx a 1/10th. So I don't know if it fair to bunch them together or not.

People will shun me for this but I love my hitec 645's for everything. 133 oz/in and decent speed, I ran one on my t-maxx with 40's and it worked well for me. People will tell you, "no less than 200 oz/in" I feel that is overkill. I never once wished my 645 equipped vehicles would turn faster. You can get them for about $30

I just like to see the tires turn with authority when the vehicle is stopped. If it can do that, then it can easily turn when the car is in motion.

I think it's mostly a function of weight and tire size rather than 2WD/4WD.

I have my own rule of thumb when it comes to choosing torque: approx 18-20 oz-in per 1b of vehicle weight. This is not scientific by any means, but tends to be perfect from my experience.

i've always thought

jato rustler 110-150 oz

maxx 200+ oz

I dunno if I can be much help, since I've paid at least $110 for every servo I've bought!. :lol:

I would say:

1/10th scale 2 wheel drive (RC10GT, Rustler, Jato): 80-110 oz/in

1/10th scale mini-truggy 4wd (crt.5, ls10, DST): 80-120 oz/in

1/8th Buggy 4wd: 100-175 oz/in

1/8th Truggy - Muggy: 130-200+ oz/in

E-Maxx - Revo - Savage - LST (Single servo setups): 120-200+ oz/in

The only thing I would consider "overkill" is the Hitec HS7955TG. That I'd say is mainly for large crawler use.

^^^^^ he has it right on the money. i go for speed over torque, just make sure your servo saver is setup properly (not too tight or too loose) and your end points are set corecttly and yoru servos should last you a long time. and gear set are cheap compared to buying a new servo when you use high dollar digitals servo with high speed and high torque ratings.

i guess we should know if you are bashing or racing. my opinion was based on bashing. IMHO you should buy a jr z8800t, because I have one for sale:lol:

i use the HS-5955TG in just about everything i race (revo and 8ight B) and the HS-645MG in my bashers (lightning 2 buggy and LSP truggy)

I had good luck with Hitec so I'm using 5955TGs for all my trucks. 5645MG, 5625MG, and 2163Ko Propo for throtlle in my nitro trucks.

For what it's worth.. :whistle:

98% of my servos is the JR DS 8711, :yes: it has 440 oz of torque. They are like $140 each thou but worth every penny..:wink:

The new Airtronics 94780 is also a killer one,:yes: it get (I think) 420 oz of torque.. but again it's like $120.00.. :oh:

Remember you get what you pay for!.. :angel:

Hope that helps..

Have a great one

80-100, 80-100, 135+, 180+, 200+ in order

Thanks for the input guys. I think Brian is on to something with his rule of thumb he uses for servos. It seems to fit right in the range that Whats_Nitro and Rootar put down. The rest of you guys are all over the board! LOL JK you guys. All of your posts were very helpful. Atleast the way Brian put it I might be able to remember it better. I'm sitting well on the high torque servos. I'm running the HS5955TG in the evo and emaxx and have the HS5988TG in the Kyosho truggy and Losi eight. This will help me figure out a decent servos for the smaller RCs at half the cost of the ones above. I have a rag tag fleet of servos as I bet most of you do also. A box with Futaba, Traxxas, Hitec, no namers, cut cords, and a zip lock bag with a bunch of gears that are not inner changable with any other servo. A winter project/goal is to get a decent digital servo on each of the RC. One of thier own. I have stolen so many parts off the Pede that all that is left is the FLM chassis. Well there's more but that all that is put together.


I do have another one you could help out with. I've been wondering about the manual brake/throttle servo. What would you recommend for the manual brake servo in a STRR truggy or even a losi 8b. Pardon my ignorance here but is there any physics(?) or what not involved with the way these manual brakes are used that a high torque servo not really required to stop or is it all servo force that makes them stop short of the curb?

If your running a nitro it seem like it could be a catch 22 if you need torque for the brakes but you would want speed for the throttle.

Thanks pedeboi364. Your numbers also fit in with Brians rule of thumb. Nice to have some consistency.

All my 1/8's and crawlers use 5955's or 7955's depending on when they were purchased.

If you hunt around / wait for sales and coupons you can get them at a reasonable price - I've never paid for that $90 each for them... It adds up as I have 7 of them but the 645's don't cut it for 1/8 for me. I use one on a crt.5 build though.

mine is all racing but the same servos apply for bashing just make sure your servo saver and endpoints are set right and your not gonna have any problems with a good servo holding up.

you gotta remember the bigger and badder the servo they pull alot more juice, which can be taxing on most controller built in becs, if your running an external then no big deal

In my crt.5 I use a 125oz. JR and Futaba

In my 1/8 buggy 200oz. Airtronics