Servo Comparison Savox Power HD Turnigy Traxxas Hexfly

Comparison of a few 6v servos

Specs below are copied directly from the manufacture site when possible.
Power HD 23kg
https://rover.ebay.com/rover/1/711-53...
Torque(4.8V): 18.0 kg-cm (250.0 oz/in)
Torque(6.0V): 23.0 kg-cm (319.4 oz/in)
Speed: 0.14 sec (4.8V) │ 0.12 sec (6.0V)
Operating Voltage：4.8 ~ 6.0 DC Volts
Weight: 75 g (2.65 oz)
Bearing Type：Ball Bearing x 2
Motor Type：Coreless Motor
Gear Type：Titanium & Steel
Operating Temperature：-20℃~60℃
Working frequence：1520μs / 333hz
Size：40.7 x 20.5 x 38.5 mm ( 1.60 x 0.80 x 1.49 in)

Power HD 20kg
https://rover.ebay.com/rover/1/711-53...
Torque(4.8V): 16.5 kg-cm (229.1 oz/in)
Torque(6.6V): 20.0 kg-cm (277.7 oz/in)
Speed: 0.18 sec (4.8V) │ 0.16 sec (6.6V)
Operating Voltage: 4.8 ~ 6.6 DC Volts
Weight: 60g (2.12 oz)
Bearing Type: Ball Bearing x 2
Motor Type: DC Motor
Gear Type: Copper & Aluminum

Savox 1230
https://rover.ebay.com/rover/1/711-53...
Dimensions(mm): 40.3x20.2x45.0
Weight(g): 79.0
Speed(@4.8V sec/60): .20
Torque(@4.8V oz-in): 416.6
Speed(@6.0V sec/60): .16
Torque(@6.0V oz-in): 500.0
Gear: Unique Steel
Bearing: 2BB
Case: Full Aluminum
25 Tooth Spline


Traxxas 2075x
https://rover.ebay.com/rover/1/711-53...
Metal Gear, Ball Bearing
Digital High-torque 125 oz-in.
Transit Time .17 sec/60°
L=55mm, H= 42.75mm, W=21.5mm

Hexfly HX-15s
https://rover.ebay.com/rover/1/711-53...
Full Metal Gear Servo 15KG, Splashproof.
HEXFLY 9KG.
Type: Analog ; Speed: .24 at 4.8v / .21 at 6.0v.
Torque: 9kg*cm @ 4.8v / 10kg*cm @ 6.0v.
Gear Type: Metal.


Turnigy 959 (version 2)
https://hobbyking.com/en_us/turnigytm...
TGY-MG959 V2 spec.
Control system: +pulse width control 1520usec neutral
Required pulse: 3-5V peak to peak square wave
Operating voltage: 4.8v~6v
Operating temperature range: -20~+60C
Operating speed (4.8v): 0.17sec / 60 degree at no load
Operating speed (6.0v): 0.15sec / 60 degree at no load
Stall torque @ 4.8V: 25.0kg.cm
Stall torque @ 6.0V: 30.0kg.cm
Operating angle: 45 deg. one side pulse travelling 400usec
Direction: Counter clockwise/pulse travelling 1520-1900usec
Motor type: Coreless motor
Potentiometer drive: Indirect drive
Bearing type: Dual ball bearing
Gear type: All metal gears
Connector wire length: 12in
Dimensions: 40.2 x 20.1 x 36.8mm
Weight: 2.64oz. (78g)
Spline Count: 25