Graupner HBS 770 BBMG

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-09

Identity
Brand
Product Number	7986
Category	Hobby
Performance
Torque	7.4V 97.22 oz-in 6.0V 84.72 oz-in 4.8V 62.50 oz-in Bottom 10%
Speed	7.4V 0.07 sec/60° 6.0V 0.08 sec/60° 4.8V 0.10 sec/60° Above Average
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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*Based on known specs.

Class Comparison

Torque	Bottom 10% Stronger than 7% of 1043 Digital Standard servos at 4.8V
Speed	Above Average Faster than 77% of 1041 Digital Standard servos at 4.8V
Weight	Average Lighter than 64% of 1902 Digital Standard servos

Performance Analysis

Shaft Power	1.16–2.57 W
Power Density	1.349 W/in³ More power-dense than 27% of 1759 Digital Standard servos
Torque Density	1.0593 oz-in/g Stronger than 4% of 1036 Digital Standard servos
Torque-to-Volume Ratio	32.83 oz-in/in³ Denser torque than 5% of 1042 Digital Standard servos
Speed-to-Weight	0.16949 (1/sec·g) Faster than 79% of 1033 Digital Standard servos
Speed-Torque Trade-off	6.25 Better balanced than 7% of 1031 Digital Standard servos
Voltage Range Width	3.6 V Wider voltage range than 86% of 1539 Digital Standard servos