Steering Servo Minimum Torque

[DaveG28]

As per the titel i guess, what is the mimimum torque needed on an 8th buggy steering servo?

Also, any particulare requirements around the throttle servo?

[dave g]

i would say12kg minimum,around 15 is better especially if you end up on high bite/muddy tracks.

the ace 1015 would be my choice,im sure others will chirp in with their faves.

[j.m.]

Don't forget metal gears!!! Plastic won't last long with that much force.

[birdy]

As dave says an +12kg, ACE servo, or equivalent Savox.

I use a Futaba BLS 351 for the steering & BLS 451 for the Throttle.

[Chrislong]

I am another for the Ace DS1015's - they do a deal for 2pcs at JEspares, so check that out.

Use the provided arm for steering, it is strong, but for the throttle/brake arm use the arm that came with your chassis (I recall it being the Futaba one) - and put a bag between it to make it tight, then washer under head of screw to spread the load - don't want that slipping!!!!!

Savox 1258 & 1256 seems to be another good combo to choose.

[DaveG28]

Cheers guys. On the throttle side, is 9kg/cm enough torque for the brakes?

[Chrislong]

Yep, just make sure to set the end point so it just about locks the brakes. Id rather put a strong one in and then I know that the use it is in is well within it.

[Marvin]

Easily - 7 or 8kg/cm is enough for the steering to be honest. Throttle/brake takes less effort, so you may as well save some power and go for a lower torque model.

[dave g]

7-8kg is nowhere near enough im afraid to say..that may be ok on dirt but when it gets high grip and wet mud you will miss the extra kg's.

far better to buy a good servo once than to buy a cheap one..ten have to spend again later.

[Chaz]

The worst thing you can do is skimp out on servos and starter boxes. As said, get a high torque servo like the ACE/AE 1015's or Savox servos definetly for the steering. I would personaly get the same for the brakes. Been running the 1015s for about 1.5 years and they are perfect.

[DaveG28]

I'm looking to get sanwa stuff if possible, have found a couple of their new servo's which seem to do the trick (SRG-CR and SRG-CZ) one for throttle and one for steering.

My only sight nervousness is I can't find anywhere that says whether they are plastic or metal geared!

tbh on the electric 8th I've been running the servo saver gives quite early so I wouldn't have though "impact" was as big a problem, just having the strength to physically turn it on high grip!? Then again I don't really know which is why I'm asking

[Neil Skull]

I think this is a very good thread.
I am of the opinion that get a higher torque than you think you need as it will take more of a hammering.

I have used ACE servos in my 1/8th and they are really good.
Everything else i use Orion 1409. I always keep a spare one as i know it will work for any application i want

[Neil Skull]

Originally Posted by DaveG28

I'm looking to get sanwa stuff if possible, have found a couple of their new servo's which seem to do the trick (SRG-CR and SRG-CZ) one for throttle and one for steering.

My only sight nervousness is I can't find anywhere that says whether they are plastic or metal geared!

tbh on the electric 8th I've been running the servo saver gives quite early so I wouldn't have though "impact" was as big a problem, just having the strength to physically turn it on high grip!? Then again I don't really know which is why I'm asking

Sanwa are good servos too. not sure if those are metal geared though!

[matdodd]

Its well worth taking a look at the savox 1256TG 20kg and quick to, plus you can get 2 for £104.00

[Marvin]

Originally Posted by dave g

7-8kg is nowhere near enough im afraid to say..that may be ok on dirt but when it gets high grip and wet mud you will miss the extra kg's.

far better to buy a good servo once than to buy a cheap one..ten have to spend again later.

I don't cheap out on servos - I have run Futaba BLS servos for 2 seasons.

The BLS-451 is sooo easily enough, and that 'only' has 10kg/cm of torque.

Originally Posted by Chaz

The worst thing you can do is skimp out on servos and starter boxes. As said, get a high torque servo like the ACE/AE 1015's or Savox servos definetly for the steering. I would personaly get the same for the brakes. Been running the 1015s for about 1.5 years and they are perfect.

I run far more expensive servos than Savoxs and Aces - I'm simply saying, still buy quality, but 8kg/cm is enough.

[dave g]

for you yes..for me no.

[richardmid1]

Digital servos have higher holding power than analogue servos so 8kg+ would be fine for a digital servo but you would need 12kg+ for an analogue servo.

Does anyone use the Align DS610 servos? Digital, 12kg, 0.08sec/60 degrees @ 6v. £45!

[dave g]

you dont even have a 1/8th do you rich?

[richardmid1]

Not yet but I know a thing or two about servos from 5 years flying helis.

[dave g]

only got 20 yrs to catch up on my knowledge of rc cars then rich..

i personally wouldnt use less than 12kg whether it be digital or not in a 1/8th buggy..but each to their own.