Hitec HS-7940TH

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-08

Identity
Brand
Product Number	37940S
Category	Hobby
Discontinued	Yes
Performance
Torque	7.4V 222.00 oz-in 6.0V 181.00 oz-in Average
Speed	7.4V 0.07 sec/60° 6.0V 0.08 sec/60° Above Average
Physical
Weight	2.29 ozAverage
Dimensions	L 1.57 in W 0.79 in H 1.50 in
Drivetrain
Motor Type	Coreless
Gears	Titanium
Gear Spline/Teeth	24 T estimate
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Pulse Cycle	20 ms
Pulse Width	900-2100 µs
Control System	PWM
Programmable	Yes
Electrical & Environment
Operating Voltage	6–7.4 V

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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	Average Stronger than 42% of 997 Digital Standard servos at 6.0V
Speed	Above Average Faster than 88% of 996 Digital Standard servos at 6.0V
Weight	Average Lighter than 44% of 1889 Digital Standard servos

Performance Analysis

Shaft Power	4.18–5.86 W
Power Density	3.152 W/in³ More power-dense than 61% of 1741 Digital Standard servos
Torque Density	2.7889 oz-in/g Stronger than 39% of 989 Digital Standard servos
Torque-to-Volume Ratio	97.29 oz-in/in³ Denser torque than 41% of 996 Digital Standard servos
Speed-to-Weight	0.19260 (1/sec·g) Faster than 84% of 987 Digital Standard servos
Speed-Torque Trade-off	14.48 Better balanced than 25% of 987 Digital Standard servos
Torque Gain per Volt	16.18%/V More voltage-responsive (torque) than 54% of 808 Digital Standard servos
Speed Gain per Volt	10.20%/V More voltage-responsive (speed) than 17% of 830 Digital Standard servos
Voltage Range Width	1.4 V Wider voltage range than 38% of 1485 Digital Standard servos