The 57HZ76-13 is a high-torque Nema 23 stepper motor featuring a faceplate dimension of 57mm x 57mm. Delivering a holding torque of 1.20Nm at a relatively low current rating of 1.76A, this motor is optimized for precision motion control applications. Its 4-wire bipolar configuration makes it highly compatible with standard digital stepper drivers like the TB6600, DM542, or A4988/DRV8825 (when adjusted correctly), serving as a staple component for DIY CNC routers, heavy-duty 3D printers, and industrial automation equipment.

Specifications

• Model Number: 57HZ76-13
• Frame Size: Nema 23 (57mm x 57mm)
• Holding Torque: 1.20Nm (170 oz-in or 12.2 kg-cm)
• Rated Current: 1.76 A per phase
• Configuration: 4-Wire Bipolar
• Step Angle: 1.8℃ (200 steps per full revolution)
• Motor Length: Approx 76mm (Excluding the shaft)
• Shaft Type: D-Cut (Flat surface to prevent pulley/coupler slippage)
• Shaft Diameter: Typically 6.35mm (1/4 inch) or 8mm
• Phase Resistance: Low internal resistance for efficient thermal handling

Features

• High Torque-to-Current Ratio: Delivering 1.20Nm at just 1.76A means the motor runs remarkably efficiently. It places less stress on your stepper driver, allowing you to use more affordable driving electronics without risking rapid overheating.
• 4-Wire Bipolar Precision: Configured natively for maximum holding torque across its speed curve, providing rigid positional locking when active.
• D-Shape Output Shaft: Features a machined flat indentation along the drive shaft. This ensures that grub screws on timing pulleys, rigid couplers, or lead screw adapters lock down securely, preventing structural drift during rapid direction changes.
• Robust Thermal Dissipation: Built with a rugged aluminum casing and internal steel laminations designed to radiate heat away from the copper coils during high-duty production cycles.

Common Applications

• DIY CNC Routers & Mills: Driving the X, Y, and Z axes through lead screws or rack-and-pinion assemblies to cut wood, plastics, and soft metals.
• Large-Scale 3D Printers: Powering independent dual Z-axis rods or heavy CoreXY gantries where Nema 17 motors lack the required torque.
• Laser Cutters & Engravers: Moving heavy optical rail carriages quickly across wide working beds.
• Automated Lab Equipment: Operating linear stages, rotary tables, and precision fluid-pumping apparatuses.

Usage & Tuning Tips

• Current Limiting is Critical: You must configure the current limiting switches (DIP switches) on your stepper driver to match the motor's 1.76A rating before turning on the power supply. Setting the driver current higher than 1.76A will cause the motor to overheat rapidly and melt its internal insulation, permanently ruining the coils.
• Never Disconnect While Powered: Never unplug the 4-wire motor cable from the driver while the power supply is on. Disconnecting a stepper motor under load causes massive inductive voltage spikes that will instantly blow out the output MOSFETs of your stepper driver.
• Microstepping Balance: For general CNC use, setting your driver to 1/4 or 1/8 microstepping (400 to 1600 steps/rev) offers an excellent balance between smooth movement, high positional precision, and maximum torque retention. Avoid excessively high microstepping (e.g., 1/32 or 1/64) on heavy loads, as holding torque decreases significantly between microsteps.
• Heat Management: Stepper motors are designed to run hot; it is completely normal for the motor body to reach temperatures up to 60℃ - 70℃ during extended operation. However, if it becomes too hot to touch briefly without pain, lower the driver current slightly down to 1.5A.