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Graupner HVS 939 BBMG

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-07-10
Identity
Brand Graupner
Product Number 7975
Category Hobby
Performance
Torque
7.4V 166.67 oz-in
6.0V 145.83 oz-in
Speed
7.4V 0.16 sec/60°
6.0V 0.19 sec/60°
Running Current (add)
Stall Current (add)
Physical
Weight 2.05 oz
Dimensions L 1.57 in
W 0.77 in
H 1.65 in
Case Material (add)
Drivetrain
Motor Type Brushed
Motor Drive (add)
Gears Steel
Gear Spline/Teeth (add)
Shaft Size (add)
Rotation Mode (add)
Rotation/Support Dual Bearings
Backlash (add)
Control & Signal
Modulation Digital
Direction (add)
Rotational Range (add)
Mechanical Limit (add)
Pulse Cycle 3000 ms
Pulse Width (add)
Neutral Position 1500 µs
Dead Band (add)
Refresh Rate (add)
Angle Sensor (add)
Control System PWM
Programmable (add)
Signal Voltage (add)
Electrical & Environment
Operating Voltage 4.8–8.4 V
Power Source (add)
Regulator Type (add)
Temperature (add)
Water Rating (add)
Certification (add)
Idle Current (add)
Connectivity
Connector JR (Universal)
Wire Length (add)
Origin
Country of Origin (add)

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.

Performance Analysis

Shaft Power 1.42–1.93 W
Torque Density2.5143 oz-in/g
Torque-to-Volume Ratio72.95 oz-in/in³
Power Density0.964 W/in³
More power-dense than 17% of the 1643 Digital Standard servos in the database
Speed-to-Weight0.09074 (1/sec·g)
Speed-Torque Trade-off27.71
Voltage Range Width3.6 V
Wider voltage range than 87% of the 1268 Digital Standard servos in the database

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