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Please note that our team will be away from May 30th through June 7th. You are welcome to place orders during this time, but please be aware that all AR4 purchases made during this window will begin shipping on Monday, June 8th.
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  • 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).
Did you know? 👋
We have a ton of free resources to help you build the AR4 robot?
Company Website:

AR4 MK4 Robot Combo Kit

From $1,189.00

This combo kit provides all the primary structural and hardware components to build the robot. You do need to purchase the motors and drivers factory direct from Stepperonline. To keep the AR4 project as low cost as possible I dont mark these up, add any taxes, tariffs or additional shipping fees - purchasing the motors direct keeps the robot cost as low as possible. You also need to 3D print a number of the covers and spacers - this also keeps the project cost as low as possible not having to pay for injected molded components.

This Robot kit incudes:

  • 26 machined aluminum pieces
  • All bearings
  • Belts
  • Pulleys
  • Shafts
  • Pins
  • Machine screws
  • Set screws
  • All the primary electrical components needed to build the AR4 robot.

This Robot kit does NOT include

The AR4 MK4 Robot Combo Kit is a versatile and professional 6-axis robotic arm, engineered for both real-world applications and education. The AR4 MK4 is capable of automation solutions for makers, engineers, and manufacturers, thanks to its robust 4.15lb payload capacity. This kit provides an affordable, hands-on platform for developing automation skills, prototyping work cells, or deploying actual light-duty tasks.

Reach: 24.75 inches (62.9 cm)
Payload: 4.15 lbs (1.9 kg)
Repeatability: 0.2 mm
Robot Weight (Aluminum): 27 lbs (12.25 kg)
Max Power Consumption: 8.25 amps (198 watts)

Kits are shipped within 1 to 2 business days.

Returns on assembled or partially assembled kits can not be accepted. All other returns are subject to 25% restock fee. Any credit card orders canceled prior to shipping subject to $36 processing fee. Teensy 4.1 cannot be warrantied once the package is opened or connections made.

You must 3D print your own covers and spacers, motors and drivers are availble factory direct from Stepperonline.
View the Robot Build Manual
Your complete online reference. Includes full assembly instructions, wiring diagrams, and technical specs. Always up to date, perfect for printing or workshop use.
Add a Gripper or Tool Holder?
Pneumatic Gripper Parts Kit
Pneumatic Gripper Parts Kit
$139.00
Servo Gripper Parts kit
Servo Gripper Parts kit
$74.50
Additional Options
AR4 Modbus PLC upgrade option
AR4 Modbus PLC upgrade option
$16.00
AR4 MK4 CAD Models - SOLIDWORKS & .STEP files
AR4 MK4 CAD Models - SOLIDWORKS & .STEP files
$99.00
Did you know? 👋
We have a ton of free resources to help you build the AR4 robot?
AR4 Robot Build Resources
Master your AR4 robot from build to advanced programming. Our ecosystem provides step-by-step guidance with the Build Manual, continuous learning through Tutorials & Courses, instant answers in the Knowledge Base, and direct support from our Community and Legacy Forums.
Additional Products

Complete AR4 MK3 & MK4 stepper-motor, driver & power supply package – factory direct from Stepperonline

Purchasing the motors and drivers direct from Stepperonline keeps the project cost as low as possible. I don't mark these up, add tax, tariffs or additional shipping. Please find the AR4 motors and drivers kit factory direct using this link

AR4 MK4 Aluminum Parts Kit

$699.00

AR4 MK4 Hardware Kit

$319.00

AR4 MK4 Electrical Parts Kit

$229.00

Pneumatic Gripper Parts Kit

$139.00

Servo Gripper Parts kit

$74.50

AR4 Modbus PLC upgrade option

$16.00

AR4 MK4 CAD Models – SOLIDWORKS & .STEP files

$99.00

HTD Series Belt Update for Joint 3

$32.50

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