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250:1 Micro Metal Gearmotor HPCB with Extended Motor Shaft

Product Code: 3078
Excl. VAT: £12.73 Incl. VAT: £15.28
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This gearmotor is a miniature high-power brushed DC motor with long-life carbon brushes and a 248.98:1 metal gearbox.

It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft.

Key specs at 6 V: 120 RPM and 120 mA with no load, 60 oz-in (4.3 kg-cm) and 1.6 A at stall.

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).

Dimensions

Size: 10 × 12 × 26 mm1
Weight: 9.5 g
Shaft diameter: 3 mm2

General specifications

Gear ratio: 248.98:1
Free-run speed @ 6V: 120 rpm
Free-run current @ 6V: 120 mA
Stall current @ 6V: 1600 mA
Stall torque @ 6V: 60 oz·in
Extended motor shaft?: Y
Long-life carbon brushes?: Y
Motor type: 1.6A stall @ 6V (HPCB - carbon brush)

Notes:

1* .Output shaft adds 9 mm to the 26 mm length.
2* D shaft.

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250:1 Micro Metal Gearmotor HPCB with Extended Motor Shaft
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