Collection: Stepper Motor Robot Arms

Overview

Our stepper motor robot arm kits use NEMA 17 and NEMA 23 stepper motors for precision open-loop positioning — the same motor type found in CNC machines and 3D printers. With 200 steps per revolution (1.8° per step) and microstepping down to 1/16 step, these arms achieve sub-millimeter positioning accuracy without encoders. Prices from $162 to $420.

Stepper vs Servo: When to Choose Stepper Motors

Servo motors are easier to control and work well for 0°–180° positioning tasks. Stepper motors are the right choice when you need multi-revolution positioning (stepper arms can rotate joints continuously, not just 180°), higher holding torque at standstill, repeatable absolute positioning without homing sensors, and compatibility with existing CNC/Grbl control software. If you are building a pick-and-place machine or automating a repetitive task, stepper motors are the professional choice.

Stepper Arm Kit Details

• 4-Axis Stepper Arm ($162): Base, shoulder, elbow, wrist — NEMA 17 on all axes, Arduino + CNC shield control, Grbl compatible
• Multi-Axis Industrial ($420): NEMA 23 on primary axes, NEMA 17 on wrist, steel + aluminum hybrid frame, highest payload in catalog
• Both: Include motor driver boards, mounting hardware, and sample G-code/Arduino control sketches

Related Collections

See also: Advanced & Professional Arms, Premium Arms, and Arduino Compatible Arms.

Shipping & Returns

Free US shipping on orders over $49. Ships 1–3 business days. 30-day guarantee.