Graupner HCM 860 BBMG

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*Based on known specs.

Technical Specifications

Last Updated: 2026-10-25

Identity
Brand
Product Number	S4072
Category	Hobby
Performance
Torque	7.4V 444.44 oz-in 6.0V 361.11 oz-in 4.8V 277.77 oz-in Average
Speed	7.4V 0.12 sec/60° 6.0V 0.14 sec/60° 4.8V 0.17 sec/60° Below Average
Physical
Weight	2.54 ozBelow Average
Dimensions	L 1.57 in W 0.79 in H 1.59 in
Case Material	Metal
Drivetrain
Motor Type	Coreless
Gears	Metal
Rotation Mode	Positional
Rotation/Support	Dual Bearings
Control & Signal
Modulation	Digital
Electrical & Environment
Operating Voltage	4.8–8.4 V
Connectivity
Connector	JR (Universal)

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Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 64% of 1060 Digital Standard servos at 4.8V
Speed	Below Average Faster than 26% of 1045 Digital Standard servos at 4.8V
Weight	Below Average Lighter than 29% of 1880 Digital Standard servos

Performance Analysis

Shaft Power	3.02–6.85 W
Power Density	3.473 W/in³ More power-dense than 66% of 1768 Digital Standard servos
Torque Density	3.8579 oz-in/g Stronger than 57% of 1053 Digital Standard servos
Torque-to-Volume Ratio	140.85 oz-in/in³ Denser torque than 62% of 1058 Digital Standard servos
Speed-to-Weight	0.08170 (1/sec·g) Faster than 16% of 1038 Digital Standard servos
Speed-Torque Trade-off	47.23 Better balanced than 73% of 1034 Digital Standard servos
Voltage Range Width	3.6 V Wider voltage range than 85% of 1560 Digital Standard servos