Graupner HVC 870 BBMG

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-26

Identity
Brand
Product Number	S4066
Category	Hobby
Discontinued	Yes
Performance
Torque	7.4V 229.17 oz-in 6.0V 201.39 oz-in 4.8V 166.70 oz-in Average
Speed	7.4V 0.12 sec/60° 6.0V 0.15 sec/60° 4.8V 0.17 sec/60° Below Average
Physical
Weight	2.36 ozAverage
Dimensions	L 1.575 in W 0.787 in H 1.575 in
Drivetrain
Motor Type	Coreless
Gears	Steel
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Control System	PWM
Electrical & Environment
Operating Voltage	4.8–8.4 V
Power Source	2S LiPo
Connectivity
Connector	JR (Universal)

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 37% of 1060 Digital Standard servos at 4.8V
Speed	Below Average Faster than 26% of 1045 Digital Standard servos at 4.8V
Weight	Average Lighter than 40% of 1880 Digital Standard servos

Performance Analysis

Shaft Power	1.81–3.53 W
Power Density	1.808 W/in³ More power-dense than 39% of 1768 Digital Standard servos
Torque Density	2.4881 oz-in/g Stronger than 31% of 1053 Digital Standard servos
Torque-to-Volume Ratio	85.37 oz-in/in³ Denser torque than 35% of 1058 Digital Standard servos
Speed-to-Weight	0.08780 (1/sec·g) Faster than 22% of 1038 Digital Standard servos
Speed-Torque Trade-off	28.34 Better balanced than 49% of 1034 Digital Standard servos
Voltage Range Width	3.6 V Wider voltage range than 86% of 1560 Digital Standard servos