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Technical Specifications
Last Updated: 2026-07-10Identity
Performance
Physical
Drivetrain
Control & Signal
Electrical & Environment
Connectivity
Origin
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| Identity | |
| Brand |  |
| Product Number | 474519 |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
6.0V
33.00 oz-in
2.38 kg-cm
0.2 N-m
4.8V
28.00 oz-in
2.02 kg-cm
0.2 N-m
|
| Speed |
6.0V
0.07 sec/60°
857.1 deg/s
142.9 RPM
4.8V
0.08 sec/60°
750.0 deg/s
125.0 RPM
|
| Running Current | (add) |
| Stall Current | (add) |
| Physical | |
| Weight | 0.92 oz26.0 g |
| Dimensions |
L 1.26 in W 0.63 in H 1.24 in L 32.0 mm W 16.0 mm H 31.5 mm |
| Case Material | Plastic |
| Drivetrain | |
| Motor Type | 3-pole |
| Motor Drive | (add) |
| Gears | Plastic |
| Gear Spline/Teeth | 23 T |
| Shaft Size | (add) |
| Rotation Mode | (add) |
| Rotation/Support | Dual Bearings |
| Backlash | (add) |
| Control & Signal | |
| Modulation | Digital |
| Direction | (add) |
| Rotational Range | 180° |
| Mechanical Limit | (add) |
| Pulse Cycle | 3.7 ms |
| Pulse Width | 1000-2000 µs |
| Neutral Position | 1500 µs |
| Dead Band | (add) |
| Refresh Rate | 333 Hz |
| Angle Sensor | Potentiometer |
| Control System | PWM |
| Programmable | No |
| Signal Voltage | (add) |
| Electrical & Environment | |
| Operating Voltage | 4.8–6 V |
| Power Source | (add) |
| Regulator Type | (add) |
| Temperature | (add) |
| Water Rating | (add) |
| Certification | (add) |
| Idle Current | (add) |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | (add) |
| Origin | |
| Country of Origin | Japan |
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.
Performance Analysis
| Shaft Power | 0.65–0.87 W |
| Torque Density | 1.0769 oz-in/g Stronger than 6% of the 219 Digital Mini servos in the database |
| Torque-to-Volume Ratio | 28.45 oz-in/in³ Denser torque than 4% of the 224 Digital Mini servos in the database |
| Power Density | 0.886 W/in³ More power-dense than 15% of the 425 Digital Mini servos in the database |
| Speed-to-Weight | 0.48077 (1/sec·g) Faster than 77% of the 220 Digital Mini servos in the database |
| Speed-Torque Trade-off | 2.24 Better balanced than 5% of the 223 Digital Mini servos in the database |
| Torque Gain per Volt | 14.88%/V More voltage-responsive (torque) than 40% of the 190 Digital Mini servos in the database |
| Speed Gain per Volt | 11.90%/V More voltage-responsive (speed) than 22% of the 190 Digital Mini servos in the database |
| Voltage Range Width | 1.2 V Wider voltage range than 28% of the 288 Digital Mini servos in the database |
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Reviews (1)
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BasementEngineer
March 21, 2012Application(s): Used for tail rotor on 450 electric helicopter
Comments: The Airtronics 94819 fast BB servo appears to be *very* well-made, with two ball bearings supporting the output shaft and high-quality plastic gears that have no perceptible freeplay. The ball bearing races also have a snug fit on both the inside and outside diameters, giving no slop at all at the output arm. It is a quiet and smooth running servo, with no overshoot or jitter/chatter at all. Very nicely done by any stretch, but this servo is only 30 bucks from airtronics.net, plus five bucks shipping to my front door in Ontario, Canada! The 94819 gives excellent performance on my 450 electric heli tail rotor. The specs listed on this website are as published on the box, and dimensions are correct.