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JR S1855
Mini

JR S1855

Compatible Hardware

*Based on known specs.

Technical Specifications

Last Updated: 2026-10-09
Identity
Brand JR
Product Number T0078360
Category Hobby
Performance
Torque
8.4V 122.21 oz-in
7.4V 108.32 oz-in
6.6V 95.82 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
Case Material Metal
Drivetrain
Motor Type Coreless
Gears Metal
Gear Spline/Teeth 21 T
Rotation/Support Dual Bearings
Control & Signal
Modulation Digital
Rotational Range 180°
Neutral Position 1500 µs
Control System XBUS / PWM
Programmable Yes
Electrical & Environment
Operating Voltage 4.5–8.5 V
Connectivity
Connector JR (Universal) estimate
Wire Length 60 mm

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 51% of 466 Digital Mini servos

Performance Analysis

Shaft Power 1.61–2.51 W
Power Density4.299 W/in³
More power-dense than 82% of 440 Digital Mini servos
Torque Density3.7577 oz-in/g
Torque-to-Volume Ratio164.07 oz-in/in³
Speed-to-Weight0.35651 (1/sec·g)
Speed-Torque Trade-off10.54
Voltage Range Width4.0 V
Wider voltage range than 94% of 351 Digital Mini servos

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