Pololu Wheel 42x19mm Pair

Pololu Wheel 42x19mm Pair
Pololu item #: 1090 342 in stock

Price break Unit price (US$)
1 6.98
10 5.50
50 4.58


backorders allowed

These white plastic wheels have rubber tires measuring 42 mm (1.65″) in diameter and press-fit onto the 3mm D output shafts on many of our motors, including our micro metal gearmotors and our plastic gearmotors with 3mm D-shafts. Teeth on the hub optionally allow a reflectance sensor to be used for encoder feedback. These wheels are sold in pairs.

Select options:
 Description Specs (4) Pictures (11) Resources (0) FAQs (1) On the blog (1) 

Overview

These rugged wheels are designed to press-fit securely onto the 3mm D output shafts of our micro and 15.5D metal gearmotors. These gearmotors should be mounted onto the side of the hub with the protruding teeth, as shown on the right. The output shaft will slide into the socket easily at first but will achieve a snug fit when pressed through to the other edge of the hub.

The output shafts on our selection of Solarbotics metal gear motors will also fit these wheels, but because they are shorter they will have to be mounted onto the other side of the wheel where the fit is tighter (which means the Solarbotics metal gearmotors will not work with the quadrature encoder associated with this wheel). These wheels will also work in this orientation on the Pololu plastic gearmotors with 3mm D-shaft outputs.

Our extended micro metal gearmotor bracket is specifically designed to work with this wheel. Please note that the non-extended version of our mounting bracket (product #989) will not work well with this wheel.

Micro metal gearmotor with Pololu wheel 42×19mm and extended bracket.

Specifications

  • Diameter: 1.65″ (42 mm)
  • Width of tire: 0.75″ (19 mm)
  • Weight: 0.66 oz (19 g)
  • Shaft type: 3mm “D”


Encoder Feedback

The hub has twelve teeth, each 3 mm wide and separated from its neighbors by 3 mm gaps. We offer a quadrature encoder that uses these teeth to provide up to 48 counts per revolution (a linear resolution of just under 3 mm or 1/8″). The encoder is designed to work with our extended micro metal gearmotor bracket and our micro metal gearmotors as shown in the pictures below. The compact layout of the board fits all of the components within the envelope of the hub and tire, allowing the board to be mounted between the motor and a chassis. The encoder can be purchased as an individual unit or as a part of an encoder set that includes two encoders, a pair of extended brackets, and a pair of 42×19mm wheels.

The following oscilloscope capture shows the two encoder output channels while the 42×19mm wheel is spinning at close to 630 RPM. The two channels are approximately 90° out of phase, allowing you to determine both rotational speed and direction.

Oscilloscope capture of encoder outputs with the wheel spinning at 630 RPM.

People often buy this product together with:

Pololu Micro Metal Gearmotor Bracket Extended Pair Pololu Micro Metal Gearmotor Bracket Extended Pair
Pololu Ball Caster with 3/8" Metal Ball Pololu Ball Caster with 3/8" Metal Ball
Pololu Micro Metal Gearmotor Bracket Pair - Black Pololu Micro Metal Gearmotor Bracket Pair - Black

Related Products

Encoder for Pololu Wheel 42x19mm
Pololu 42x19mm Wheel and Encoder Set
Pololu Micro Metal Gearmotor Bracket Extended Pair
115:1 Metal Gearmotor 15.5Dx30L mm
100:1 Micro Metal Gearmotor
35:1 Mini Metal Gearmotor
Solarbotics GM18 30:1 Mini Metal Gear Motor
120:1 Mini Plastic Gearmotor, 90° 3mm D-Shaft Output
Pololu Wheel 40x7mm Pair - Black
Pololu Wheel 40x7mm Pair - Red
Pololu Wheel 40x7mm Pair - White
Pololu Wheel 32x7mm Pair - White
Zumo Robot for Arduino, v1.2 (Assembled with 75:1 HP Motors)
Pololu 22T Track Set
Pololu 30T Track Set
Solarbotics RW2 Wheel (external set screw)
Pololu 42x19mm Idler Wheel/Sprocket Pair - White
Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)
Pololu 42x19mm Idler Wheel/Sprocket Pair - Black

Related Categories

Pololu Wheels and Tracks
Micro Metal Gearmotors
Pololu Plastic Gearmotors
Solarbotics Wheels
Log In
Pololu Robotics & Electronics
Shopping cart
(702) 262-6648
Same-day shipping, worldwide
Menu
Shop Blog Forum Support
My account Comments or questions? About Pololu Contact Ordering information Distributors