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120:1 Mini Plastic Gearmotor, Offset 2mm Spline Output

SKU: POLOLU-1122

$6.91 AUD, inc GST
$6.28 AUD, exc GST

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120:1 Mini Plastic Gearmotor, Offset 2mm Spline Output
6.91 AUD

SKU: POLOLU-1122

$6.91 AUD, inc GST
$6.28 AUD, exc GST
1 reviews 0 5 5
In stock, with a short lead time. 102 units dispatch in 4 to 9 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Mon, 28th of Aug with Express Post within Australia.
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Pololu mini plastic gearmotor offset output with opened gearbox.

Overview

This brushed DC gearmotor is very compact and weighs only 0.7 ounces (19.5 grams) — perfect for building a quick, miniature robot. The recommended operating voltage range for this motor is 3 to 6 V, though the gearmotor can start rotating at voltages as low as 0.6 V. At 4.5 V, the motor has a free-run current of 80 mA and a stall current of 800 mA; this relatively low current draw makes this a great match for Pololu's qik 2s9v1 dual serial motor controller and programmable Orangutan robot controllers. The stall current, torque, and rotation speed will approximately scale linearly with the motor voltage. The gearbox is protected by a built-in safety clutch that will typically slip before gear teeth can shear.

Dimensions

Dimension diagram of the mini plastic gearmotor with offset 2mm spline output (units are mm over [in]).

This dimension diagram is also available as a downloadable pdf (76k pdf).

This gearmotor features a splined, chrome-finish output shaft with a 2mm-crest diameter. This shaft can be used with custom wheels or with Pololu's adapter for LEGO wheels. The gearbox output shaft is offset from but parallel to the motor shaft.

Gearmotor Versions

we carry two versions of mini plastic gearmotors with 2 mm diameter spline output shafts, one with an offset shaft and one with a 90° shaft.

Pololu have many more versions of these mini plastic gearmotors available with 3 mm diameter “D”-shaped output shafts (just like the ones on Pololu's micro metal gearmotors) that are compatible with many Pololu wheels and Pololu's 3 mm universal mounting hubs. These versions offer two output shaft orientations relative to the motor shaft (offset and 90°), two motor options (normal and high-power, or HP for short), and two gearbox options (120:1 and 180:1). Additionally, some of these versions are available with an extended motor shaft that protrudes from the rear of the motor by approximately 4.5 mm. This second shaft has a diameter of 1.5 mm and rotates at the same speed as the input to the gearbox, offering a way to add a custom-built encoder to provide motor speed or position feedback. The following table shows all of the mini plastic gearmotors that have 3 mm D-shafts:

Motor Type Stall
Current
@ 4.5 V
No-Load
Speed
@ 4.5 V
Stall Torque
@ 4.5 V


90° output


90° output + motor shaft


offset output


offset output + motor shaft
high-power
(HP)
1250 mA 150 RPM 25 oz-in 120:1 mini HP 120:1 mini HP 120:1 mini HP 120:1 mini HP
low-power 800 mA 120 RPM 20 oz-in 120:1 mini 120:1 mini 120:1 mini 120:1 mini
80 RPM 30 oz-in 180:1 mini 180:1 mini

Note: The stall torque values listed are approximate, and the built-in safety clutch might start slipping at lower torques.

Documentation and Resources:

Product Comments


Customer Reviews

  1. Review by Neil verified purchaser
    Rating
    100

    I bought this gearmotor so I could build the six legged robot shown by Burhan Saifullah in his YouTube video; an enjoyable starter project that turned out to be interesting and a lot of fun.
    Because of its constant speed and compact size, the motor works perfectly for a build like this.
    I was also very pleased with the cost; it's a good quality product at an affordable price. Well worth 5 Stars! (Posted on 20/11/2016)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.