There are 4 main groups of parts needed to build the AR4 robot:

AR4 MK3 Combo Kit - This includes all the aluminum structural components, hardware components and primary electrical components.
Stepper Motors and Drivers - These are available at the lowest price; factory direct from Stepperonline (see link on this page).
3D Printed Components - You will need to 3D print your covers and spacers in any color you choose.
Gripper or Tool Holder - You can install any type of gripper or tool holder you need, kits for a pneumatic and servo gripper are available options (see link on this page).

AR4 MK5 Combo Kit - This includes all the aluminum structural components, hardware components and primary electrical components.

Stepper Motors and Drivers - These are available factory direct from Stepperonline - I don't resell, add tax, tariffs or additional cost - to keep the cost as low as I can for everyone I recommend buying direct from Stepperonline. (see link on this page).

Gripper or Tool Holder - You can install any type of gripper or tool holder you need, kits for a pneumatic and servo gripper are available options (see link on this page).

3D Printed Components - You will need to 3D print your covers and spacers in any color you choose.

VIEW THE TUTORIALS PAGE FOR A COMPLETE RUNDOWN ON HOW TO BUILD THE AR4 ROBOT 👉

View Tutorials

When placing your order please add any necessary VAT or EORI numbers for overseas orders in the order notes section.

Additional Note: The MK5 already includes Hall Effect sensors and HTD belts as standard equipment. These upgrade kits are intended only for previous-generation models. (Select this only if you require extra replacement parts for an MK5)

View Product Page

Category: 3D Printed CoversRobot Kits

AR4 MK5 Robot 3D Printed Parts Set – Red

Key Features

High quality PETG filament
Every 3D printed part necessary to complete the build
Save time and get your robot completed quickly
Structural parts, or parts with threads, are printed with 5 perimeter layers and 25% infill. Making them extremely strong
Non-Structural parts are printed with 4 perimeter layers and 25% infill. Which means the simple parts are even overbuilt
Manufactured to meet, or exceed, the specifications Annin Robotics requires for the AR4 robot build
Higher quality and durability than other generic 3D printing sites that don’t allow you to specify the level of quality and strength

Disclaimer: 3D printed parts may show slight surface variations or minor cosmetic imperfections due to the printing process. These do not affect the structural integrity or functionality of the parts.

Shop at C.I. Printing Services

View Product Page

Category: 3D Printed CoversRobot Kits

AR4 MK5 Robot 3D Printed Parts Set – Black

Key Features

High quality PETG filament
Every 3D printed part necessary to complete the build
Save time and get your robot completed quickly
Structural parts, or parts with threads, are printed with 5 perimeter layers and 25% infill. Making them extremely strong
Non-Structural parts are printed with 4 perimeter layers and 25% infill. Which means the simple parts are even overbuilt
Manufactured to meet, or exceed, the specifications Annin Robotics requires for the AR4 robot build
Higher quality and durability than other generic 3D printing sites that don’t allow you to specify the level of quality and strength

Shop at C.I. Printing Services

View Product Page

Category: 3D Printed CoversRobot Kits

AR4 MK5 Robot 3D Printed Parts Set – Blue

Key Features

High quality PETG filament
Every 3D printed part necessary to complete the build
Save time and get your robot completed quickly
Structural parts, or parts with threads, are printed with 5 perimeter layers and 25% infill. Making them extremely strong
Non-Structural parts are printed with 4 perimeter layers and 25% infill. Which means the simple parts are even overbuilt
Manufactured to meet, or exceed, the specifications Annin Robotics requires for the AR4 robot build
Higher quality and durability than other generic 3D printing sites that don’t allow you to specify the level of quality and strength

Shop at C.I. Printing Services

AR4 in Industry

Deploy the AR4 for light assembly, prototyping, or production tasks. Its Arduino/Python control and Modbus support bridge DIY projects and professional automation.

AR4 in Education

From STEM classrooms to university labs, the AR4 teaches real-world automation with accessible Python programming and 3D-printable customization.