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JR S1855
Mini

JR S1855

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-07-28
Identity
Brand JR
Category Hobby
Performance
Torque
8.4V 310.40 oz-in
7.4V 275.14 oz-in
6.6V 243.40 oz-in
Speed
8.4V 0.09 sec/60°
7.4V 0.10 sec/60°
6.6V 0.11 sec/60°
Physical
Weight 0.90 ozAverage
Dimensions L 1.142 in
W 0.433 in
H 1.181 in
Drivetrain
Motor Type Coreless
Gears Metal
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Rotational Range 180°
Neutral Position 1500 µs
Control System PWM
Electrical & Environment
Operating Voltage 4.5–8.5 V
Connectivity
Connector JR (Universal) estimate

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.

Class Comparison

WeightAverage
Lighter than 47% of 454 Digital Mini servos

Performance Analysis

Shaft Power 4.09–6.38 W
Power Density10.919 W/in³
4th-highest power density of 425 Digital Mini servos
Torque Density9.5451 oz-in/g
Torque-to-Volume Ratio416.77 oz-in/in³
Speed-to-Weight0.35651 (1/sec·g)
Speed-Torque Trade-off26.77
Voltage Range Width4.0 V
Wider voltage range than 97% of 290 Digital Mini servos

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