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PTK 8850
Standard

PTK 8850

Compatible Hardware

*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10
Identity
Brand PTK
Category Hobby
Performance
Torque
8.4V 583.25 oz-in
7.4V 527.71 oz-in
7.2V 416.61 oz-in
5.0V 361.06 oz-in Above Average
Speed
8.4V 0.09 sec/60°
7.4V 0.10 sec/60°
6.0V 0.12 sec/60°
5.0V 0.15 sec/60° Average
Physical
Weight 2.48 ozBelow Average
Dimensions L 1.57 in
W 0.79 in
H 1.45 in
Case Material Plastic
Drivetrain
Motor Type Brushless
Gears Steel
Gear Spline/Teeth 25 T estimate
Rotation Mode Positional
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Rotational Range 180°
Pulse Cycle 3.003 ms
Pulse Width 500-2500 µs
Dead Band 2 µs
Refresh Rate 333 Hz
Angle Sensor Potentiometer
Control System PWM
Electrical & Environment
Operating Voltage 5–8.4 V
Water Rating Waterproof
Connectivity
Connector JR (Universal)
Wire Length 300 mm

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Class Comparison

TorqueAbove Average
Stronger than 78% of 1043 Digital Standard servos at 5.0V
SpeedAverage
Faster than 37% of 1041 Digital Standard servos at 5.0V
WeightBelow Average
Lighter than 32% of 1902 Digital Standard servos

Performance Analysis

Shaft Power 4.45–11.98 W
Power Density6.663 W/in³
More power-dense than 89% of 1759 Digital Standard servos
Torque Density5.1433 oz-in/g
Stronger than 79% of 1036 Digital Standard servos
Torque-to-Volume Ratio200.76 oz-in/in³
Denser torque than 80% of 1042 Digital Standard servos
Speed-to-Weight0.09497 (1/sec·g)
Faster than 30% of 1033 Digital Standard servos
Speed-Torque Trade-off54.16
Better balanced than 80% of 1031 Digital Standard servos
Torque Gain per Volt18.10%/V
More voltage-responsive (torque) than 71% of 850 Digital Standard servos
Speed Gain per Volt19.61%/V
More voltage-responsive (speed) than 78% of 871 Digital Standard servos
Voltage Range Width3.4 V
Wider voltage range than 71% of 1539 Digital Standard servos
Dead-Band-to-Pulse-Width Ratio0.0010
Finer dead band than 78% of 468 Digital Standard servos

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