PTK 8850

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-24

Identity
Brand
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	8.4V0.09 sec/60°
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	Stainless 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

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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.

Compatible Hardware

Amazon eBay

*Spec is estimated from brand data.

Class Comparison

Torque	Above Average Stronger than 78% of 1060 Digital Standard servos at 5.0V
Weight	Below Average Lighter than 33% of 1880 Digital Standard servos

Performance Analysis

Shaft Power	12.54 W
Power Density	6.973 W/in³ More power-dense than 91% of 1768 Digital Standard servos
Torque Density	5.1433 oz-in/g Stronger than 80% of 1053 Digital Standard servos
Torque-to-Volume Ratio	200.76 oz-in/in³ Denser torque than 82% of 1058 Digital Standard servos
Speed-to-Weight	0.16564 (1/sec·g)
Speed-Torque Trade-off	31.05
Torque Gain per Volt	18.10%/V More voltage-responsive (torque) than 70% of 873 Digital Standard servos
Voltage Range Width	3.4 V Wider voltage range than 71% of 1560 Digital Standard servos
Dead-Band-to-Pulse-Width Ratio	0.0010 Finer dead band than 76% of 504 Digital Standard servos