The 4th Axis Rotary Unit adds full rotational machining capability to your CNC system, allowing for cylindrical carving, indexing, rotary engraving, gear cutting, multi-sided machining, and more. Designed for stability and precision, this setup is powered by a NEMA 34 closed loop stepper motor, providing high torque, accurate positioning, and reliable performance under load.

This unit features a 100mm K12 4-jaw chuck and tailstock support, making it suitable for gripping a wide range of workpiece sizes. A 4:1 reduction ratio delivers smooth rotation and enhanced torque control, while the included HBS86H Hybrid Servo Driver ensures zero-lost-step performance with encoder feedback.

Includes: 4th Axis Rotary Unit, NEMA 34 4.5Nm Closed Loop Motor, HBS86H Driver + 3m Encoder Cable, 400W 60V Power Supply, 100mm K12 4-Jaw Chuck, Tailstock

Specifications:

• Motor: NEMA 34 Closed Loop (4.5Nm holding torque)

• Driver: HBS86H Hybrid Servo Drive (includes 3m encoder cable)

• Power Supply: 400W 60V DC

• Chuck: K12 100mm 4-Jaw Chuck

• Tailstock: Included

• Gear Reduction: 4:1 Ratio

• Clamping Range:

  • Internal Grip: 2–30mm

  • External Grip: 30–80mm

• Center Height: 65mm

• Application: CNC A-Axis / Rotary Machining / Cylindrical Engraving