Home
Shop
Deals
15% Off
228:1 Plastic Gearmotor, Offset Output

Skip to the beginning of the images gallery

228:1 Plastic Gearmotor, Offset Output

Rating:

80% of 100

SKU: POLOLU-1118 Brand: Pololu

This 228:1 gearbox with brushed DC motor has a low-current motor and provides power and speed that is comparable to an RC servo at a fraction of the cost. At 6 V, it has a free-run speed of 45 RPM and a stall torque of approximately 100 oz-in. Though the product picture shows two gearmotors, this product is for a single motor.

Special Price $13.45 AUD, inc GST

Regular Price $15.82 AUD, inc GST

$12.23 AUD, exc GST

In stock, ships same business day if ordered before 2PM
Delivered by Tue, 30th of Apr

Inside the gearbox of the 228:1 plastic gearmotor with offset output.

This 228:1 plastic gearmotor (gearbox with brushed DC motor) is a great low-cost alternative to modified hobby servos or Tamiya gearboxes. The low-current motor is a perfect match for Pololu's qik 2s9v1 dual serial motor controller, Baby Orangutan robot controller, or DRV8833 dual motor driver carrier, and the compact size makes this unit an attractive choice for small robot designs. The recommended operating voltage range for this motor is 3 V to 12 V.

This is a higher-torque, lower-speed version of the 120:1 plastic gearmotor offset output. At 6 V, the gearbox and motor provide approximately 100 oz-in of torque and 45 RPM. The free-running current is 70 mA, and the stall current is 800 mA. The gearbox is protected by a built-in safety clutch that will typically slip before gear teeth can shear.

This gearmotor comes pre-assembled, with the gears fully enclosed, and the output shaft is 6 mm long and 7 mm in diameter with two sides flattened. The output shaft is along the same axis as the motor shaft, but offset; Pololu also sell a similar gearmotor with a 90° output shaft.

There are two built-in mounting holes that work with Pololu's stamped aluminum L-bracket and extended stamped aluminum L-bracket, as shown in the pictures below:

Plastic gearmotor with offset output (item #1118 or #1119) mounted with Pololu stamped aluminum L-bracket.

Plastic gearmotor with offset output (item #1118 or #1119) mounted with Pololu extended stamped aluminum L-bracket.

This gearmotor is compatible with the Solarbotics GMPW plastic wheel, which is available in a variety of colors.

Details for item #1118

Exact gear ratio: 36×37×37×248×9×9×8≈228.1736×37×37×248×9×9×8˜228.1736×37×37×248×9×9×8˜228.17

This 228:1 gearbox with brushed DC motor has a low-current motor and provides power and speed that is comparable to an RC servo at a fraction of the cost. It has a recommended operating voltage range of 3 V to 12 V

Key specifications:

voltage	no-load performance	stall extrapolation
6 V	45 RPM, 70 mA	7.2 kg·cm (100 oz·in), 800 mA

Dimensions

Dimensions of the 120:1 and 228:1 plastic gearmotors with offset outputs. Units are mm over [inches].

This diagram is also available as a downloadable PDF (242k pdf).

People often buy this product together with:

Solarbotics GMW (GM2/3/8/9 Gear Motor Mount - ONE mount)

Brushed DC Motor: 130-Size, 6V, 11.5kRPM, 800mA Stall

200:1 Plastic Gearmotor, 90° Output

Dimensions

Size:	42 x 22.7 x 47.8 mm¹
Weight:	33 g
Shaft diameter:	7 mm

General specifications

Typical operating voltage:	6 V
Gear ratio:	228:1
No-load speed @ 6V:	45 rpm
No-load current @ 6V:	70 mA
Stall current @ 6V:	800 mA
Stall torque @ 6V:	100 oz·in

Notes:

1: See drawing for detailed dimensions.

File downloads

Dimension diagram of 120:1 and 228:1 Plastic Gearmotor, Offset Output (242k pdf)

Recommended links

MATLAB script to plot motor performance curves for Pololu brushed DC gearmotors

This MATLAB script, written by Ali Asgher Mansoor Habiby, plots speed, power, current draw, and efficiency as they vary with torque when you input the gearmotor specifications. It also prints the resistance of the motor, and the current draw and torque at which maximum efficiency and maximum power occur.

This product is listed in:

Deals>15% Off

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$6+ for Standard Post (typically 6+ business days, tracked)
$10+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

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

$11+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

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

Take a look at our customer service page if you have other 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.

Have a product question? We're here to help!