Graupner HCM 870 BBMG

Search Amazon Search eBay

Compatible Hardware

Amazon eBay

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-26

Identity
Brand
Product Number	S4073
Category	Hobby
Performance
Torque	7.4V 354.13 oz-in 6.0V 291.64 oz-in 4.8V 222.20 oz-in Average
Speed	7.4V 0.11 sec/60° 6.0V 0.12 sec/60° 4.8V 0.15 sec/60° 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/Support	Dual Bearings
Control & Signal
Modulation	Digital
Electrical & Environment
Operating Voltage	4.8–8.4 V
Connectivity
Connector	JR (Universal)

Submit Missing Data Report an Error

Disclaimer: Most data is sourced from the manufacturer. Some data is sourced from our loyal community and with the help of AI. We aim for accuracy but are not responsible for inaccurate information.

Compatible Hardware

Amazon eBay

*Based on known specs.

Class Comparison

Torque	Average Stronger than 51% of 1055 Digital Standard servos at 4.8V
Speed	Average Faster than 43% of 1038 Digital Standard servos at 4.8V
Weight	Below Average Lighter than 29% of 1872 Digital Standard servos

Performance Analysis

Shaft Power	2.74–6.24 W
Power Density	3.162 W/in³ More power-dense than 62% of 1762 Digital Standard servos
Torque Density	3.0861 oz-in/g Stronger than 44% of 1048 Digital Standard servos
Torque-to-Volume Ratio	112.67 oz-in/in³ Denser torque than 49% of 1053 Digital Standard servos
Speed-to-Weight	0.09259 (1/sec·g) Faster than 29% of 1031 Digital Standard servos
Speed-Torque Trade-off	33.33 Better balanced than 56% of 1029 Digital Standard servos
Voltage Range Width	3.6 V Wider voltage range than 85% of 1552 Digital Standard servos