K42HRHM-LNK-NS-00 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific K42HRHM-LNK-NS-00 is a stepper motor from the K PowerPac Motors series featuring a NEMA 42 frame, heavy duty mounting, and SIGMAX enhanced construction. It has a holding torque of 28.2 Nm, rated phase current of 9.90 A, and operates at insulation voltages up to 340 Vdc. The single shaft motor has a 4.325 inch square frame, handles axial loads up to 405 lb, and offers IP65 protection.
Internal Product Review
The K42HRHM-LNK-NS-00 is a Pacific Scientific stepper motor built on a NEMA 42 frame with heavy duty NEMA mounting. Enhanced SIGMAX construction and IP65 protection give the motor strong durability for demanding motion applications. A 28.2 Nm holding torque and ±1.5% step accuracy make the unit an excellent choice for precise, high-load positioning.
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Product Description:
Pacific Scientific manufactures the K42HRHM-LNK-NS-00 as part of its K PowerPac Motors series. This NEMA 42 stepper motor uses enhanced SIGMAX construction to increase flux density within a 4.325 in. square frame while keeping the overall length to 150 mm. Heavy-duty NEMA mounting holes in the laminated housing allow the unit to be bolted directly to rigid mounting plates. Power is supplied through a standard lead-wire connection that uses a four-lead parallel configuration, while the lack of feedback makes the motor suitable for open-loop motion tasks such as index tables and gantry axes.
The motor develops a holding torque of 28.2 Nm when both phases receive the rated current of 9.90 A. Copper losses are governed by a phase resistance of 0.260 ohms, while the windings have a phase inductance of 4.20 mH. A step angle of 1.8° combines with a step accuracy of ±1.5% to provide predictable incremental movement during positioning routines. The rotor has an inertia of 0.155 oz-in-s², balancing acceleration capability with resistance to overshoot. Insulation resistance is rated at 100 megohms when tested at 340 VDC, helping isolate the drive electronics from the stator core during high-energy operating cycles.
The single shaft carries a straight key that provides positive engagement with keyed couplings. The shaft and bearing assembly accommodates an axial load of up to 405 lb and a radial load of up to 110 lb. The housing has an IP65 protection rating to resist dust and water ingress, although the shaft is supplied without a seal to reduce friction. Two magnet stacks generate flux through the standard windings, and the laminated rotor core supports consistent torque across the operating speed range. The motor is designed for ambient temperatures from -20 °C to +40 °C, making it suitable for typical industrial enclosures. Its two-section stack length provides the magnetic depth needed for the stated torque while retaining the compact frame dimensions.
