Graupner HBS 770 BBMG

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-23

Identity
Brand
Product Number	7986
Category	Hobby
Performance
Torque	7.4V 76.38 oz-in 6.0V 63.88 oz-in
Speed	7.4V 0.05 sec/60° 6.0V 0.06 sec/60°
Physical
Weight	2.08 ozAverage
Dimensions	L 1.575 in W 0.768 in H 1.575 in
Drivetrain
Motor Type	Brushless
Gears	Steel
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Rotational Range	90°
Pulse Cycle	2.5 ms
Neutral Position	1500 µs
Refresh Rate	400 Hz
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–8.4 V
Power Source	2S LiPo
Idle Current	0.035 A
Connectivity
Connector	JR (Universal)

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Compatible Hardware

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*Based on known specs.

Class Comparison

Weight

Average

Lighter than 65% of 1872 Digital Standard servos

Performance Analysis

Shaft Power	1.97–3.14 W
Power Density	1.648 W/in³ More power-dense than 35% of 1762 Digital Standard servos
Torque Density	1.0827 oz-in/g
Torque-to-Volume Ratio	33.55 oz-in/in³
Speed-to-Weight	0.28249 (1/sec·g)
Speed-Torque Trade-off	3.83
Voltage Range Width	3.6 V Wider voltage range than 85% of 1552 Digital Standard servos