Graupner BS 9631

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*Spec is estimated from brand data.

Technical Specifications

Last Updated: 2026-10-10

Identity
Brand
Category	Hobby
Discontinued	Yes
Performance
Torque	6.0V 151.50 oz-in 4.8V 121.80 oz-in Below Average
Speed	6.0V 0.12 sec/60° 4.8V 0.15 sec/60° Average
Physical
Weight	1.73 ozAbove Average
Dimensions	L 1.59 in W 0.83 in H 1.61 in
Drivetrain
Motor Type	Brushless
Gears	Plastic
Gear Spline/Teeth	23 T estimate
Rotation/Support	Dual Bearings
Electrical & Environment
Operating Voltage	4.8–6 V
Connectivity
Connector	JR (Universal) estimate

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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

*Spec is estimated from brand data.

Class Comparison

Torque	Below Average Stronger than 32% of 1294 Standard servos at 4.8V
Speed	Average Faster than 48% of 1290 Standard servos at 4.8V
Weight	Above Average Lighter than 79% of 2538 Standard servos

Performance Analysis

Shaft Power	1.50–2.33 W
Power Density	1.099 W/in³ More power-dense than 49% of 149 Graupner servos
Torque Density	2.4857 oz-in/g Stronger than 68% of 73 Graupner servos
Torque-to-Volume Ratio	57.33 oz-in/in³ Denser torque than 43% of 73 Graupner servos
Speed-to-Weight	0.13605 (1/sec·g) Faster than 26% of 73 Graupner servos
Speed-Torque Trade-off	18.27 Better balanced than 83% of 72 Graupner servos
Torque Gain per Volt	20.32%/V More voltage-responsive (torque) than 75% of 41 Graupner servos
Speed Gain per Volt	20.83%/V More voltage-responsive (speed) than 65% of 41 Graupner servos
Voltage Range Width	1.2 V Wider voltage range than 61% of 90 Graupner servos