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- Order number: Pololu-992
- Manufacturer product ID: 992
Overview
These tiny brushed DC gearmotors are intended for use at 6 V, though in general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range (rotation can start at voltages as low as 0.5 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. The micro metal gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and with four different motors: high-power with long-life carbon brushes (HPCB), high-power with shorter-life precious metal brushes (HP), medium-power (MP), and low-power. The HPCB version (shown on the left in the picture below) can be differentiated from versions with precious metal brushes (shown on the right) by its copper-colored terminals. Note that the HPCB terminals are 0.5 mm wider than those on the other micro metal gearmotor versions (2 mm vs. 1.5 mm), and they are about 1 mm closer together (6 mm vs. 7 mm).
With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change. Please see the micro metal gearmotor comparison table for detailed specifications of all our micro metal gearmotors. This dynamically-sortable table can help you find the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application. A more basic comparison table is available below.
Some versions of the gearmotors are available with an additional 1 mm-diameter output shaft that protrudes from the rear of the motor. This 4.5 mm-long rear shaft rotates at the same speed as the input to the gearbox and offers a way to add an encoder, such as our magnetic encoder for micro metal gearmotors (see the picture on the right), to provide motor speed or position feedback.
Motor Type | Stall Current @ 6 V | No-Load Speed @ 6 V | Approximate Stall Torque @ 6 V | Single-Shaft (Gearbox Only) | Dual-Shaft (Gearbox & Motor) |
---|---|---|---|---|---|
high-power, carbon brushes (HPCB) | 1600 mA | 3000 RPM | 4 oz-in | 10:1 HPCB | 10:1 HPCB dual-shaft |
1000 RPM | 9 oz-in | 30:1 HPCB | 30:1 HPCB dual-shaft | ||
625 RPM | 15 oz-in | 50:1 HPCB | 50:1 HPCB dual-shaft | ||
400 RPM | 22 oz-in | 75:1 HPCB | 75:1 HPCB dual-shaft | ||
320 RPM | 30 oz-in | 100:1 HPCB | 100:1 HPCB dual-shaft | ||
200 RPM | 40 oz-in | 150:1 HPCB | 150:1 HPCB dual-shaft | ||
140 RPM | 50 oz-in | 210:1 HPCB | 210:1 HPCB dual-shaft | ||
120 RPM | 60 oz-in | 250:1 HPCB | 250:1 HPCB dual-shaft | ||
100 RPM | 70 oz-in | 298:1 HPCB | 298:1 HPCB dual-shaft | ||
32 RPM | 125 oz-in | 1000:1 HPCB | 1000:1 HPCB dual-shaft | ||
high-power (HP) (same specs as HPCB above) | 1600 mA | 6000 RPM | 2 oz-in | 5:1 HP | |
3000 RPM | 4 oz-in | 10:1 HP | 10:1 HP dual-shaft | ||
1000 RPM | 9 oz-in | 30:1 HP | 30:1 HP dual-shaft | ||
625 RPM | 15 oz-in | 50:1 HP | 50:1 HP dual-shaft | ||
400 RPM | 22 oz-in | 75:1 HP | 75:1 HP dual-shaft | ||
320 RPM | 30 oz-in | 100:1 HP | 100:1 HP dual-shaft | ||
200 RPM | 40 oz-in | 150:1 HP | 150:1 HP dual-shaft | ||
140 RPM | 50 oz-in | 210:1 HP | |||
120 RPM | 60 oz-in | 250:1 HP | |||
100 RPM | 70 oz-in | 298:1 HP | 298:1 HP dual-shaft | ||
32 RPM | 125 oz-in | 1000:1 HP | 1000:1 HP dual-shaft | ||
medium-power (MP) | 700 mA | 2200 RPM | 3 oz-in | 10:1 MP | 10:1 MP dual-shaft |
730 RPM | 8 oz-in | 30:1 MP | |||
420 RPM | 13 oz-in | 50:1 MP | |||
290 RPM | 17 oz-in | 75:1 MP | 75:1 MP dual-shaft | ||
220 RPM | 19 oz-in | 100:1 MP | 100:1 MP dual-shaft | ||
150 RPM | 24 oz-in | 150:1 MP | |||
75 RPM | 46 oz-in | 298:1 MP | |||
25 RPM | 80 oz-in | 1000:1 MP | 1000:1 MP dual-shaft | ||
low-power | 360 mA | 2500 RPM | 1 oz-in | 5:1 | |
1300 RPM | 2 oz-in | 10:1 | |||
440 RPM | 4 oz-in | 30:1 | 30:1 dual-shaft | ||
250 RPM | 7 oz-in | 50:1 | 50:1 dual-shaft | ||
170 RPM | 9 oz-in | 75:1 | |||
120 RPM | 12 oz-in | 100:1 | 100:1 dual-shaft | ||
85 RPM | 17 oz-in | 150:1 | |||
60 RPM | 27 oz-in | 210:1 | |||
50 RPM | 32 oz-in | 250:1 | |||
45 RPM | 40 oz-in | 298:1 | 298:1 dual-shaft | ||
14 RPM | 70 oz-in | 1000:1 | 1000:1 dual-shaft |