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Technical Specifications
Last Updated: 2026-10-24
Weight
Dimensions
Torque
Speed
Current
Temp
Wire
| Identity | |
| Brand |  |
| Product Number | BMS-308BB |
| Category | Hobby |
| Discontinued | Yes |
| Performance | |
| Torque |
4.8V17.00 oz-in1.22 kg-cm0.1 N-m |
| Speed |
4.8V0.10 sec/60°600.0 deg/s100.0 RPM |
| Stall Current | ≤0.32 A≤320 mAAbove Average |
| Physical | |
| Weight | 0.22 oz6.2 gBottom 10% |
| Dimensions |
L 0.94 in W 0.40 in H 0.93 in L 23.9 mm W 10.2 mm H 23.6 mm |
| Drivetrain | |
| Motor Type | Coreless |
| Gears | Nylon |
| Gear Spline/Teeth | 25 T estimate |
| Rotation/Support | Single Bearing |
| Control & Signal | |
| Modulation | Analog |
| Pulse Width | 1200-1600 µs |
| Neutral Position | 1520 µs |
| Dead Band | 6 µs |
| Refresh Rate | 125 Hz |
| Electrical & Environment | |
| Operating Voltage | 4.5–5.5 V |
| Power Source | Ni-MH / Ni-CD |
| Temperature | -20–60 °C-4–140 °F |
| Idle Current | 0.005 A5 mA |
| Connectivity | |
| Connector | JR (Universal) estimate |
| Wire Length | 160 mm6.3 in |
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
| Weight | Bottom 10% Lighter than 8% of 67 Analog Nano servos |
| Stall Current | Above Average Lower draw than 74% of 51 Nano servos |
Performance Analysis
| Shaft Power | 0.31 W |
| Power Density | 0.899 W/in³ More power-dense than 54% of 66 Analog Nano servos |
| Torque Density | 2.7419 oz-in/g |
| Torque-to-Volume Ratio | 48.62 oz-in/in³ |
| Speed-to-Weight | 1.61290 (1/sec·g) |
| Speed-Torque Trade-off | 1.70 |
| Current-per-Torque Ratio | 0.0188 A/oz-in |
| Voltage Range Width | 1.0 V Wider voltage range than 23% of 41 Analog Nano servos |
| Dead-Band-to-Pulse-Width Ratio | 0.0150 Finer dead band than 3% of 40 Nano servos |
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