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Servos - Specifications & Options
Servos listed below are some of the more popular servos amongst many Baja owners.
Tables show summary data for comparison. This has been collated from a variety of sources and can therefore only serve as an approx guide - further detailed information and specifications can be found at the following locations;

www.servocity.com  |  www.amainhobbies.com  |  www.towerhobbies.com  |  www.futaba-rc.com  |  www.hitecrcd.com
Italic text indicates statistics that require confirmation. All dimensions approximate.
Colour Coding Analog Digital
STEERING SERVOS - Channel 1          Neutral position of steering servo is 10 Degrees from vertical ( appx 1pm)
SERVO SIZE  L x W x D WEIGHT TORQUE SPEED ADAPTER? NOTES
 
HPI SFL-10 2.6" x 1.18" x 2.25"  4.52oz 266.5 / 333 oz.in (4.8v/6v) 0.20 / 0.16 sec @ 60 (4.8/6V)   HPI # 80563
5B
RTR STOCK Servo (Futaba S3306)
Metal Gears upgrade available for RTR (#80584)
Also MG2 conversion gear set upgrade (#80599) available including aluminium Final Gear & Arm set (#80598)
Motor Type: 5 pole motor
Bearing Type: Dual Ball Bearing
Gear Type: Nylon
  66x30x57mm
   
128g 19.19 / 24.0 kg.cm (4.8v/6v)    
 
HPI SFL-10MG 2.6" x 1.18" x 2.25"  4.52oz 266.5 / 333 oz.in (4.8v/6v) 0.20 / 0.16 sec @ 60 (4.8/6V)   HPI # 80589
SS Kit STOCK Metal Gear (MG) servo
HD Aluminium Arm (#87280), available as an upgrade.
  66x30x57mm
   
128g 19.19 / 24.0 kg.cm (4.8v/6v)    
 
HPI SFL-10MG2 2.6" x 1.18" x 2.25"  4.52oz 266.5 / 333 oz.in (4.8v/6v) 0.20 / 0.16 sec @ 60 (4.8/6V)   HPI # 80597
5T RTR STOCK Metal Gear (MG) servo
Comes with HD Aluminium Arm (#87280)
Aluminium Final Gear
  66x30x57mm
   
128g 19.19 / 24.0 kg.cm (4.8v/6v)    
 
HPI SFL-11MG 2.6" x 1.18" x 2.25"  4.52oz 275 / 343 
oz.in (4.8v/6v)
0.19 / 0.14 sec @ 60 (4.8/6V) 5T RTR STOCK Metal Gear servo (later models)
Motor Type: 
Bearing Type:
Gear Type:
Size :
25 spline/tooth servo arm required
  66x30x57mm 128g 19.8 / 24.7kg.cm (4.8v/6v)    
 
HPI SFL-30MG2 2.6" x 1.18" x 2.25"  xoz 249.96 oz.in (6v) 0.15 sec @ 60 6V)   HPI # 102612
Option Part Metal Gear (MG) servo
Comes with HD Aluminium Arm (#87280)
Gear Type:
Aluminium Final Gear, Hybrid 1st Gear
NB -
'Overall' much stronger than SFL-10MG2 see here for HPI comment
  66x30x57mm
   
xg 18.0 kg.cm (6v)    
 
Hitec HS-5745MG 2.32" x 1.14" x 2.04" 5.68oz.  208.30 / 249.96
oz.in (4.8v/6v)
0.18 / 0.15 sec @ 60 (4.8/6V) Required - HPI part# 85461 Motor Type: 3 Pole - Cored carbon brush
Bearing Type: Triple Ball Bearing
Includes blue aluminium double servo arm
Gear Type: 1 Resin, 3 Metal
  59.00 x 29.00 x 52.00mm 161.10g 15.0 / 18.0 kg.cm (4.8v/6v)    
 
Multiplex Rhino Digi 4
(Discontinued)
2.32" x 1.14" x 2.17" 5.14oz.  283.22 / 354.03 
oz.in (4.8v/6v)
0.12 / 0.10 sec @ 40 (4.8/6V)
0.14 sec @ 60 (6V)
Required - HPI part# 85461 Motor Type: Coreless metal brush / 3 Pole Ferrite
Bearing Type: Triple Ball Bearing
Gear Type: Metal with MK Idler
Note
varying figures from different sources are given for the torque values for the Digi4.
The figures quoted here are from the actual servo case (200/250Ncm) -see conversion link below.
  59.00 x 29.00 x 55.00mm 165g 20.39 / 25.49 kg.cm (4.8v/6v)    
Hitec HS-5755MG 2.30" x 1.14" x 2.04" 5.68oz.  278 / 347 
oz.in (4.8v/6v)
0.18 / 0.15 sec @ 60 (4.8/6V) Required - HPI part# 85461 Motor Type: Coreless metal brush / 3 Pole Ferrite
Bearing Type: Triple Ball Bearing
Gear Type: Metal
8mm heavy duty output shaft
Note: This product replaces the discontinued Multiplex Rhino Digi 4 in North / Central America
  59 x 29 x 51mm 161.03g 19.9 / 24.8 kg.cm (4.8v/6v)    
 
JR DS8711 1.58" x 0.82" x 1.56" 2.36oz.  347 / 403 
oz.in (4.8v/6v)
0.19 / 0.15 sec @ 60 (4.8/6V) Required -  Motor Type: 
Bearing Type: 
Gear Type: Metal Alloy
Anodized aluminium heatsink
Size : standard (smaller than typical 1/4 scale)
  40.5 x 21.00 x 35.00mm 66g 25.0 / 29kg.cm (4.8v/6v)    
 
Hitec HS-5805MG 2.59" x 1.18" x 2.26" 6.95oz.  275 / 343 
oz.in (4.8v/6v)
0.19 / 0.14 sec @ 60 (4.8/6V)   Motor Type: 3 Pole Ferrite 
Bearing Type: Dual Ball Bearing
Gear Type: Metal Alloy
8mm heavy duty output shaft
  65.79 x 29.97x 57.40mm 197.03g 19.8 / 24.7kg.cm (4.8v/6v)    
 
Hitec HS- 805MG 2.59" x 1.18" x 2.26" 6.95oz.  275 / 343 
oz.in (4.8v/6v)
0.19 / 0.14 sec @ 60 (4.8/6V)   Motor Type: 3 Pole Ferrite 
Bearing Type: Dual Ball Bearing
Gear Type: Metal Alloy
8mm heavy duty output shaft
  65.79 x 29.97x 57.40mm 197.03g 19.8 / 24.7kg.cm (4.8v/6v)    
 

THROTTLE / BRAKE SERVOS - Channel 2

 

SERVO SIZE  L x W x D WEIGHT TORQUE SPEED ADAPTER? NOTES
 
HPI SF-4 1.57" x 0.78" x 1.50"  (<1.64oz) 90.27
oz.in (6v)
0.16 sec @ 60 (6V)
RTR STOCK Servo
(SS Kit requires a throttle servo)
Bearing Type: Dual Ball Bearing
Gear Type:
Nylon
  40x20x38.1mm
    
(<46.50g) 6.5 kg.cm (6v)    
 
Futaba S3305 1.57" x 0.78" x 1.50" 1.64oz 99 / 124
oz.in (4.8v/6v)
0.25 / 0.20 sec @ 60 (4.8/6V)
Same servo as used in RTR (HPI SF-4) but with metal gears / no o-rings (to screw heads).
Bearing Type: Dual Ball Bearing
Gear Type: Metal
  40x20x38.1mm
    
46.50g 7.1 / 8.9 kg.cm (4.8v/6v)    
 
Hitec
HS-7955TG
1.57" x 0.78" x 1.45" 2.29oz  250 / 333
oz.in (4.8v/6v)
0.19 / 0.15 sec @ 60 (4.8/6V)
Replacement model for 5955TG
Motor Type: Coreless carbon brush
Bearing Type: Dual Ball Bearing
Gear Type: Titanium
  40.00 x 20.00 x 37.00mm 64.92g 18.0 / 24.0 kg.cm (4.8v/6v)    
 
Hitec 
HS-5955TG
1.57" x 0.78" x 1.45" 2.18oz 250 / 333
oz.in (4.8v/6v)
0.19 / 0.15 sec @ 60 (4.8/6V) SEE Notes > Motor Type: Coreless metal brush 
Bearing Type: Dual Ball Bearing
Gear Type: 4x Titanium
Some filing of screw holes may be required 
  40.00 x 20.00 x 37.00mm 62.00g 18.0 / 24.0 kg.cm (4.8v/6v)    
 
ACE DS1015 1.6" x 0.81" x 1.5" 2.328 oz 201.4 oz/in
@ 6V
0.13 sec @ 60
(6V)
  Motor Type: Coreless
Bearing Type:

Gear Type: Metal
( Thunder Tiger / Team Associated)
Model replaces DS1013
  41.8 x 20.6 x 39.6mm 66.00g 14.5 kg/cm @ 6V    
 
Hitec HS-645MG 1.59" x 0.77"x 1.48"  1.94oz. 106.93/133.31
oz.in (4.8v/6v)
0.24sec/0.20sec @ 60 (4.8/6V)   Motor Type: 3 Pole Ferrite 
Bearing Type: Dual Ball Bearing

Gear Type: 3 Metal Gears & 1 Resin Metal Gear
  40.6 x 19.8 x 37.8mm 55.2g 7.7 / 9.6kg/cm  (4.8v/6v)    
 
JR Z9000T
(Discontinued)

   
        Model replaced by JR Z9100T, below
 
   
       
 
JR Z9100T 1.59" x 0.827"x1.569" 2.3oz. 300 / 370
oz.in (4.8v/6v)
0.18sec/0.15sec @ 60 (4.8/6V)   Motor Type: Coreless 
Bearing Type: Dual Ball Bearing
 
Gear Type: Metal
  -
65.00g 21.6 / 26.64kg.cm
(4.8v/6v)
   
 
Hitec
HS-5645MG
1.59" x 0.77"x 1.48"  2.1oz.  143/168
oz.in (4.8v/6v)
0.23sec/0.18sec @ 60 (4.8/6V)   Motor Type: 3 Pole Ferrite 
Bearing Type: Dual Ball Bearing
 
Gear Type: 3 Metal Gears & 1 Resin Metal Gear
  40.6 x 19.8 x 37.8mm 60g 10.3 / 12.1kg.cm
(4.8v/6v)
   
 
Savox
SC-12
56TG
x" x x"x x"  xoz.  222.1/277.6
oz.in (4.8v/6v)
0.18sec/0.15sec @ 60 (4.8/6V)   Motor Type: Coreless 
Bearing Type: Dual Ball Bearing
 
Gear Type: Titanium Alloy & Aluminium
Case: Aluminium
  40.3 x 20 x 37.2mm 52.4g 16 / 20kg.cm
(4.8v/6v)
   
             
 
Useful Conversion tables - http://www.online-unit-converter.com/torque/ 
Rev 16 -January 2011
 

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