STEPPERONLINE High Torque Nema 23 CNC Stepper Motor 3.0Nm (425oz-in) – 4.2A Bipolar, 1.8°

Overview

The STEPPERONLINE 23HS45-4204S is built for demanding CNC setups where compact size meets serious torque. With a 1.8° step angle (200 steps per revolution) and a holding torque of 3.0Nm (425oz.in), this motor is designed to deliver dependable rotary motion in tight spaces. It suits mid‑sized mills, lathes, and routers where precision and stall‑resistance matter as loads rise or cutting forces shift.

Key specifications at a glance

• Electrical: Bipolar design, rated current 4.2A per phase, phase resistance 0.9 ohms, inductance 3.8 mH (+/−20% at 1 kHz).
• Mechanical: Frame 57 x 57 mm, body length 113 mm, shaft diameter 10 mm, shaft length 24 mm, D-cut 20 mm, four leads with 400 mm cables.
• Performance: 1.8° step angle (200 steps/rev) for refined positioning; weight ≈ 1.8 kg.

What to expect in real use

In a CNC workflow, the motor offers robust holding capability that helps keep tooling stable during heavy cuts or when rapid feed changes occur. The combination of a compact frame and substantial torque makes it suitable for setups where space is limited but load demands are steady. The 4‑wire bipolar configuration supports common drive schemes used in industry, enabling smoother micro‑stepping and predictable performance when paired with a compatible current‑regulated drive.

Electrical and wiring notes

• Connections: Black(A+), Green(A-), Red(B+), Blue(B-).
• Drive requirements: Use a constant current or chopper drive controller before testing; direct power supply connection can damage the motor.

Beyond raw torque, the motor’s lead length (400 mm) offers flexible routing for compact machine layouts. Maintain a careful cabling path to minimize interference on high‑speed or high‑torque cycles.

Mounting and integration

• Frame size and mounting footprint align with common NEMA 23‑class designs, easing replacement or upgrades.
• Four‑lead configuration supports standard bipolar drive wiring and straightforward integration with CNC controllers.

Whether upgrading an existing router or equipping a compact mill, this motor delivers a measured blend of force, stability, and control. As with any high‑torque axis, pairing with a suitable drive and power supply is key to unlocking its full potential in your applications.