Graupner HBS 660 BBMG

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Technical Specifications

Last Updated: 2026-10-27

Identity
Brand
Product Number	7980
Category	Hobby
Performance
Torque	7.4V 120.83 oz-in 6.0V 100.00 oz-in 4.8V 80.56 oz-in Above Average
Speed	7.4V 0.13 sec/60° 6.0V 0.16 sec/60° 4.8V 0.20 sec/60° Bottom 10%
Physical
Weight	1.27 ozBelow Average
Dimensions	L 1.378 in W 0.63 in H 1.358 in
Drivetrain
Motor Type	Brushless
Gears	Steel
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Pulse Cycle	2.5 ms
Neutral Position	1500 µs
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–8.4 V
Connectivity
Connector	JR (Universal)

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*Based on known specs.

Class Comparison

Torque	Above Average Stronger than 72% of 290 Digital Mini servos at 4.8V
Speed	Bottom 10% Faster than 4% of 293 Digital Mini servos at 4.8V
Weight	Below Average Lighter than 15% of 505 Digital Mini servos

Performance Analysis

Shaft Power	0.74–1.72 W
Power Density	1.458 W/in³ More power-dense than 42% of 482 Digital Mini servos
Torque Density	2.2378 oz-in/g Stronger than 46% of 286 Digital Mini servos
Torque-to-Volume Ratio	68.33 oz-in/in³ Denser torque than 44% of 288 Digital Mini servos
Speed-to-Weight	0.13889 (1/sec·g) Faster than 1% of 289 Digital Mini servos
Speed-Torque Trade-off	16.11 Better balanced than 90% of 288 Digital Mini servos
Voltage Range Width	3.6 V Wider voltage range than 87% of 405 Digital Mini servos