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Motor cu reductor 25D x 56L mm HP172:1 Cod POL1577
Electronica si Roboti Componente mecanice Motoare cu reductor Motor cu reductor 25D x 56L mm HP172:1
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This cylindrical, 2.2" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 172:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor.

Key specs at 6 V: 57 RPM and 450 mA free-run, 260 oz-in (18.7 kg-cm) and 6 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)

Note: At some of the higher gear ratios, these motors can generate enough torque to damage themselves. Any torque greater than about 250 oz-in (18 kg-cm) is likely to damage the gearbox, so we recommend that you avoid stalling the 172:1 HP, 227:1, 378:1, and 499:1 versions of these motors at 6 V.
 
These motors are intended for use at 6 V. 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, though they can begin rotating at voltages as low as 1 V. Higher voltages could start negatively affecting the life of the motor.

Specifications:
Size: 25D x 56L mm
Weight: 94 grams
Shaft diameter: 4 mm
Gear ratio: 172:1
Free-run speed @ 6V: 57 rpm
Free-run current @ 6V: 450 mA
Stall current @ 6V: 6000 mA
Stall torque @ 6V: 18.7 kg-cm
 
Gearmotor Dimensions:
These gearmotors have output shafts with a diameter of 4 mm. The Pololu universal aluminum mounting hub for 4mm shafts can be used to mount our larger Pololu wheels (60mm-, 70mm-, 80mm-, and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft (see the left picture below). These are the same type of motors used in the Wild Thumper all-terrain chassis, and the gearbox’s output shaft works directly with the 120mm-diameter Wild Thumper wheels.
 
Pololu 60×8mm wheel on a Pololu 25D mm metal gearmotor.
 

Dagu Wild Thumper wheel 120×60mm (chrome) with Pololu 25D mm metal gearmotor.

 
The face plate has two mounting holes threaded for M3 screws. You can use our custom-designed 25D mm metal gearmotor bracket (shown in the picture below) to mount the gearmotor to your project via these mounting holes and the screws that come with the bracket.
 

Pololu 25D mm gearmotor with bracket.

 
The diagram below shows the dimensions (in mm) of the 25D mm line of gearmotors. The value of L is shown in the table below.
 
 
Dimension diagram (in mm) for the 25D mm metal gearmotors.

Gear Ratio L (mm)
4.4:1
9.7:1
17
20.4:1 19
34.1
47:1
21
75:1
99:1
23
172:1
227:1
25
378:1
499:1
27
 

 

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