TowerPro MG91

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-27

Identity
Brand
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 36.11 oz-in 4.8V 30.55 oz-in Average
Speed	6.0V 0.11 sec/60° 4.8V 0.13 sec/60° Below Average
Physical
Weight	0.46 ozAverage
Dimensions	L 0.898 in W 0.472 in H 1.22 in
Case Material	Metal
Drivetrain
Gears	Metal
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Direction	Clockwise
Rotational Range	165°
Pulse Cycle	20 ms
Pulse Width	710-2290 µs
Dead Band	1 µs
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–6.6 V
Temperature	0–55 °C
Connectivity
Connector	JR (Universal)
Wire Length	250 mm
Origin
Country of Origin	Taiwan

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 57% of 349 Digital Micro servos at 4.8V
Speed	Below Average Faster than 32% of 347 Digital Micro servos at 4.8V
Weight	Average Lighter than 36% of 597 Digital Micro servos

Performance Analysis

Shaft Power	0.43–0.61 W
Power Density	1.174 W/in³ More power-dense than 24% of 563 Digital Micro servos
Torque Density	2.3500 oz-in/g Stronger than 45% of 349 Digital Micro servos
Torque-to-Volume Ratio	59.08 oz-in/in³ Denser torque than 32% of 345 Digital Micro servos
Speed-to-Weight	0.59172 (1/sec·g) Faster than 32% of 347 Digital Micro servos
Speed-Torque Trade-off	3.97 Better balanced than 64% of 345 Digital Micro servos
Voltage Range Width	1.8 V Wider voltage range than 51% of 496 Digital Micro servos
Dead-Band-to-Pulse-Width Ratio	0.0006 Finer dead band than 97% of 182 Digital Micro servos