- Out-of-Stock
Pololu 42x19mm Idler Wheel/Sprocket Pair - White
These freely rotating idler sprockets match those included with our 22T and 30T track sets. The white plastic hubs can be used with the 30T track set as additional idler sprockets, or they can be used with the included rubber tires as idler wheels that have the same overall dimensions as our 42×19mm wheels. This product includes two idler sprockets/hubs, two rubber tires, and mounting hardware consisting of two shoulder bolts, two nuts, and two washers.
These idlers have 3.5 mm diameter circular holes that allow them to spin freely when used with the included shoulder bolts or similar mounting hardware. The plastic hubs are the same as the idler sprockets included with the Pololu 22T and 30T track sets, and they can be used with the 30T track set as additional idler sprockets:
![]() |
They can be used with the included rubber tires as idler wheels that have the same overall dimensions as our 42×19mm wheels:
|
|
This product includes two idler sprockets/hubs, two rubber tires, and mounting hardware consisting of two shoulder bolts, two M3 nuts, and two washers. The idler sprocket/wheel can be mounted with the provided shoulder bolt as shown in the diagram below. (The red block represents a bracket or chassis that the sprocket is being mounted to, and is not a part included with this product.) Our nylon spacers can be used to offset the idlers from a flat mounting surface.
![]() |
The diagrams below show the dimensions of the hubs and the included shoulder bolts. (Note that the hub diagram is actually the diagram of a drive sprocket; the labeled dimensions are all the same for the idler version, but the center hole is circular for the idler hubs, not D-shaped, and there is no strain-relief slit.) The threaded portion of the shoulder bolts can be cut to the desired length.
|
|
![]() |
Pololu 30T Track Set |
![]() |
Pololu Wheel 42x19mm Pair |
![]() |
Pololu 42x19mm Wheel and Encoder Set |
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Industrial depth camera with ToF sensor, designed for precise detection up to 3 meters, ideal for applications such as pick-and-place, quality control or industrial automation. With IP65/IP67 sealing, active IR, PoE connectivity and 4 TOPS computing power (including 1.4 TOPS on AI), it offers reliable operation even in harsh environments. It supports CV and AI algorithms, remote control, standalone operation and multiple network protocols, making it a versatile tool for industry and robotics. Luxonis OAK-D SR PoE
No product available!
Uni-T UT387D is a compact detector for detecting metals, live wires and wood in walls, floors and ceilings. It allows precise location of objects at a depth of up to 80 mm (metals), 50 mm (wires) and 20 mm (wood), and its ergonomic housing, LCD display and automatic calibration ensure comfortable and accurate work.
No product available!
Kit for measuring muscle activity using electromyography (EMG). Contains everything you need from the MyoWare 2.0 ecosystem to test basic configurations in your applications. SparkFun KIT-25332
No product available!
An advanced wireless communication module based on the Bluetooth 5.2 (Bluetooth® Low Energy, BLE) stack, which is designed using the powerful Nordic nRF5340 SoC. It provides GPIO, SPI, UART, TWI, I2C, PDM, PWM, ADC, NFC and USB interfaces for connecting peripherals and sensors. SparkFun WRL-25465
No product available!
Compact mini computer with quad-core Rockchip RK3328 processor and 1GB DDR4 RAM, ideal for network applications and IoT projects. Equipped with 32GB of built-in eMMC memory and support for microSD cards up to 128GB, it provides flexible data storage. The device supports 1Gbps Ethernet, two USB 2.0 Host ports, two USB-C ports and an optional Wi-Fi module, making it a versatile solution for DIY projects, routers and servers. FriendlyELEC NanoPi R2S Plus
No product available!
FM radio kit using the Si4820 and NCP2890. The board has pre-soldered circuits, making the assembly process easier for the user. To complete the radio, simply solder the remaining components, such as resistors and capacitors, and the radio offers tuning and volume control, with sound output from the included 66 mm speaker. The board is powered from 2.5 V to 5.5 V, which allows it to be used with both mains power and AA batteries, and the Si4820 circuit provides excellent radio reception quality. Kitronik 2157
No product available!
The RRH62000-A1V is an integrated air quality sensor module by Renesas, combining the measurement of particulate matter (PM1, PM2.5, PM10), volatile organic compounds (TVOC), estimated carbon dioxide levels (eCO₂), temperature, and humidity in a single device.
No product available!
Advanced ADC converter module with four channels of analog inputs for Qwiic projects, offering high resolution of 24 bits and the ability to work with single-channel and differential inputs. With a programmable amplifier, the ability to select a reference voltage and support for up to 16 modules on one I2C bus, it is an ideal solution for applications requiring precise measurement of analog signals. Sparkfun SPX-23455
No product available!
A passive on/off power switch that provides control and feedback functions, allowing you to start and safely shut down your system with short presses of the button, while a long press forces the power off. The Mk2 version, based on the 74LVC1G175 D-type flip-flop digital design, eliminates the problems of component tolerance and temperature variation, and also offers additional improvements such as a 2A self-resetting fuse, LED indicators, and the ability to connect a larger external button. SparkFun SPX-25365
No product available!
The Broadcom BCM2711 quad-core Cortex-A72 (1.5 GHz) AI camera, equipped with 1 GB RAM and 8 GB eMMC memory, offers high performance in computer vision applications, enabling image processing at 2.3 MP resolution at up to 70 FPS. With automatic optical zoom and a durable industrial aluminum construction, the device is an ideal solution for industrial automation, quality control and visual analytics. Edatec ED-AIC2100-023G06L-10810
No product available!
The Lanberg PCU6-10CC-0750-BK patch cord is an unshielded Category 6 cable (U/UTP) with a length of 7.5 meters, terminated with RJ-45 connectors. Made of copper-clad aluminum (CCA) and coated with a PVC jacket, it provides bandwidth up to 10 Gb/s at frequencies up to 250 MHz, making it suitable for computer networks requiring fast and stable connections.
No product available!
The MT9P001 CMOS sensor camera module offers 5MP resolution and high image quality thanks to DigitalClarity™ technology, even in low light. The camera supports global shutter, snapshot mode, and long exposure, enabling precise exposure control and capturing dynamic scenes. Its compact size, low power consumption, and wide range of configuration features make it an ideal choice for advanced DIY projects and image processing systems. ArduCAM B0127
No product available!
XTREME insulating tapes are high-quality PVC products with strong adhesion, great flexibility, and tear resistance, making them ideal for electrical insulation and protection against mechanical damage and weather conditions.
No product available!
Kontakt Chemie 101/200 is a fast-drying aerosol product with a capacity of 200 ml, designed to displace moisture from electronic components. Due to its high capillary activity, it effectively penetrates gaps, eliminating water and moisture, making it ideal for repairing electrical installations damaged by water.
No product available!
Finder 26.08.8.230.0000 is an impulse relay with a 230 V AC coil, featuring two normally open contacts (DPST-NO) with a maximum switching current of 10 A. This relay allows control of electrical circuits in industrial and building applications, offering reliability and durability.
No product available!
The 95.95.3SPA screw terminal socket offers secure DIN or panel mounting for 40.51 / 40.52 / 40.61 relays, supporting up to 10 A and 250 V connections in industrial control systems
No product available!
Pololu 42x19mm Idler Wheel/Sprocket Pair - White