Product Description:

The MTDE31NR-HTLDN-M350 is a hybrid stepper motor produced by Pacific Scientific for the POWERMAX II M Motors series. The unit converts electrical pulse trains from an indexer or PLC into discrete angular motion, delivering precise positioning for conveyors, labeling heads, or pick-and-place axes in automated equipment. This stepper motor supplies holding torque at standstill and executes incremental moves without feedback devices, making it a practical choice for printers, small cutters, and light material-handling stages.

Each phase draws 5.4 A DC and has a resistance of 0.29 ohms, allowing straightforward copper-loss calculations. A winding inductance of 2.5 mH moderates the rate of current change and minimizes current ripple during microstepping. The rotor inertia of 0.0083 oz-in-s² supports rapid indexing moves, while a thermal resistance of 3.9 °C/W limits temperature rise. The motor provides a holding torque of 337 oz-in to secure loads while energized, and its detent torque is 22 oz-in when the coils are off. The fundamental step increment of 1.8 degrees enables fine position control. Electrical insulation withstands 340 V DC and provides 100 MΩ of resistance between the coil set and laminated frame.

The NEMA 34-style frame measures 3.38 in across and uses a 3.875 in bolt circle with a 2.875 in pilot for concentric mounting. A 0.3750 in shaft transfers torque to the connected mechanism, and the step accuracy is ±1.5%. The rotor advances through 200 full steps per revolution, reducing the need for gearing in many indexing tasks. The motor can operate within a temperature range of −20 °C to +40 °C. Its winding system has a Class B insulation limit of 130 °C, which helps maintain dielectric integrity during continuous operation. These dimensions and operating limits allow the motor to be mounted in compact industrial equipment while retaining the torque and positioning performance required for repeated start-and-stop motion.