136:1 Sub-Micro Plastic Planetary Gearmotor 6Dx19L mm Pololu

En stock


$13,719.50

En stock

This tiny, cylindrical gearmotor consists of a coreless brushed DC motor and a 136:1 plastic planetary gearbox. The entire assembly has a diameter of just 6 mm (0.24″) and an extremely light weight of 1.25 g (0.044 oz), making it a great actuator for miniature robots and very small mechanisms.

Key specs at 6 V: 500 RPM and 45 mA free-run, 8 oz-in (0.6 kg-cm) and 400 mA stall.

 

Overview

These tiny brushed DC gearmotors have a diameter of just 6 mm and weigh just over a gram, which makes them great actuators for miniature robots and very small mechanisms. They consist of a coreless motor fastened to a planetary gearbox by a small clip. The gears are made from liquid crystal polymers (LCPs), and gearbox’s nylon output shaft is compatible with our 14 mm wheels. Three gear ratios are available:

  • 26:1, which has a free run speed of 2500 RPM and stall torque of 1.5 oz-in (110 g-cm) at 6 V
  • 136:1, which has a free run speed of 500 RPM and stall torque of 8 oz-in (550 g-cm) at 6 V
  • 700:1, which has a free run speed of 90 RPM and stall torque of 12 oz-in (900 g-cm) at 6 V

Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. For these gearboxes, the recommended upper limit for instantaneous torque is 3.5 oz-in (250 g-cm); we strongly advise keeping applied loads well under this limit. Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.

The intended nominal operating voltage for these motors is 3 V to 6 V, though in general, these kinds of motors can be used at voltages outside this range (rotation typically starts between 0.2 V and 0.3 V). Lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor. When operating at 3 V, the free-run speed, stall torque, and stall current will all be approximately half of what they are at 6 V as these specifications scale roughly linearly with voltage.

Since the gearmotor’s output shaft is nylon, there can be small variances in the diameter from unit to unit. These variations might cause press-fit attachments like our 14 mm wheel to fit loosely in some instances. If you experience a loose fit, you could try swapping wheels or using a small dab of glue to help hold the wheel on.

Gearmotor dimensions

The following diagram shows the micro plastic gearmotor dimensions in mm. The planetary gearbox has a D-shaped plastic output shaft, which is 2 mm in diameter with a section that is flattened by 0.5 mm. The “D” portion of the shaft is 2.5 mm long. The motor measures 6 mm in diameter and 9.3 mm in length, and the gearbox length, labeled “L” in the diagram below, depends on the gear ratio.

Dimensions of the Sub-Micro Plastic Planetary Gearmotors. Units are mm over [inches].

This dimension diagram is also available as a downloadable PDF (92k pdf).

These motors previously shipped with red and blue leads that extended approximately 12.5 cm (5″) from the back of the motor, but we began transitioning to shipping units with shorter red and black leads (approximately 5 cm, or 2″) in November 2019. All units with a 26:1 gear ratio are already shipping with the new, shorter leads. The other gear ratio options are still in the process of transitioning, so you could receive either lead length in your order. These leads are pre-stripped and unterminated (i.e. they do not end in a connector).

Motor accessories

The micro plastic gearmotor’s output shaft is compatible with our 14 mm wheels. We do not have any brackets for this gearmotor, and it does not have any mounting holes, but its compact size makes it easy to fasten with tape or glue. Alternatively, since this gearmotor is nearly the same size as a 1/4″ fuse, it can be mounted using standard 1/4″ (6 mm) fuse clips, which can be found at places like Radio Shack and Digi-Key.

Sub-micro plastic planetary gearmotor with a 14×4.5mm wheel.
26:1 sub-micro plastic planetary gearmotor being held by a 1/4″ (6 mm) fuse clip.

 

Dimensions

Size: 6D × 19L mm
Weight: 1.25 g
Shaft diameter: 2 mm

General specifications

Gear ratio: 136:1
No-load speed @ 6V: 500 rpm
No-load current @ 6V: 45 mA
Stall current @ 6V: 400 mA
Stall torque @ 6V: 8 oz·in

 

File downloads

Dimension diagram of Sub-Micro Plastic Planetary Gearmotors (92k pdf)
3D models of Sub-Micro Plastic Planetary Gearmotors (1MB zip)
This file contains 3D models (in the step file format) of the Sub-Micro Plastic Planetary Gearmotors.

 

Categoría:

Based on 0 reviews

0.0 overall
0
0
0
0
0

Be the first to review “136:1 Sub-Micro Plastic Planetary Gearmotor 6Dx19L mm Pololu”

There are no reviews yet.