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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | 87-SV1257MG |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
7.4V
55.50 oz-in
4.00 kg-cm
0.4 N-m
6.0V
34.70 oz-in
2.50 kg-cm
0.2 N-m
Below Average
|
| Speed |
7.4V
0.06 sec/60°
1,090.9 deg/s
181.8 RPM
6.0V
0.07 sec/60°
857.1 deg/s
142.9 RPM
Above Average
|
| Running Current |
7.4V
0.120 A
120 mA
6.0V
0.100 A
100 mA
Above Average
|
| Stall Current | 1.6–2 A1600–2000 mAAverage |
| Physical | |
| Weight | 1.04 oz29.5 gBelow Average |
| Dimensions |
L 1.378 in W 0.591 in H 1.15 in L 35.0 mm W 15.0 mm H 29.2 mm |
| Case Material | Aluminum |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Steel |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Dual Bearings |
| Control & Signal | |
| Modulation | Digital |
| Rotational Range | 110° |
| Mechanical Limit | 154° |
| Pulse Width | 800-2200 µs |
| Neutral Position | 1500 µs |
| Refresh Rate | 333 Hz |
| Control System | PWM |
| Electrical & Environment | |
| Operating Voltage | 6–7.4 V |
| Temperature | -10–50 °C14–122 °F |
| Idle Current | 0.006 A6 mA |
| Connectivity | |
| Connector | JR (Universal) |
| Wire Length | 250 mm9.84 in |
| Origin | |
| Country of Origin | Taiwan |
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
| Torque | Below Average Stronger than 16% of 290 Digital Mini servos at 6.0V |
| Speed | Above Average Faster than 89% of 293 Digital Mini servos at 6.0V |
| Weight | Below Average Lighter than 28% of 505 Digital Mini servos |
| Running Current | Above Average Lower draw than 88% of 41 Digital Mini servos at 6.0V |
| Stall Current | Average Lower draw than 45% of 94 Digital Mini servos |
Performance Analysis
| Shaft Power | 0.92–1.87 W |
| Power Density | 1.994 W/in³ More power-dense than 57% of 482 Digital Mini servos |
| Torque Density | 1.1763 oz-in/g Stronger than 9% of 286 Digital Mini servos |
| Torque-to-Volume Ratio | 37.09 oz-in/in³ Denser torque than 10% of 288 Digital Mini servos |
| Speed-to-Weight | 0.48426 (1/sec·g) Faster than 79% of 289 Digital Mini servos |
| Speed-Torque Trade-off | 2.43 Better balanced than 9% of 288 Digital Mini servos |
| Current-per-Torque Ratio | 0.0576 A/oz-in More efficient than 4% of 58 Digital Mini servos |
| Idle-to-Running Current Ratio | 0.060 Lower idle draw than 45% of 21 Digital Mini servos |
| No-Load vs Stall Current Spread | 20.00 Narrower current spread than 25% of 21 Digital Mini servos |
| Torque Gain per Volt | 42.82%/V More voltage-responsive (torque) than 98% of 257 Digital Mini servos |
| Speed Gain per Volt | 19.48%/V More voltage-responsive (speed) than 71% of 262 Digital Mini servos |
| Voltage Range Width | 1.4 V Wider voltage range than 43% of 405 Digital Mini servos |
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