Product Description:

Pacific Scientific builds the K43HRLM-LNK-NS-01 for the K PowerPac Motors series. This NEMA-frame stepper motor converts digital pulse trains from an indexer or drive into incremental rotary motion, making it useful for positioning tables, feeders, and process valves that need open-loop speed and angle control. SIGMAX-enhanced construction raises flux density in the laminated rotor, so higher force is produced per ampere. A single straight-key shaft is protected by a shaft seal, and the heavy-duty NEMA mounting flange lets the unit bolt directly to standard gearheads or machine frames.

The motor delivers up to 39.9 Nm of holding torque, which is the maximum static load the rotor can resist without step loss when rated current is applied. Each commanded step advances the shaft by 1.8°, a common full-step angle that simplifies microstepping ratio selection. Positional repeatability is held within ±1.5%, supporting precise linear indexing when the 4-lead series winding is driven from a constant-current source. The 4.325 in. square frame complies with NEMA conventions and aligns the pilot diameter with typical bearing housings. Internal insulation withstands up to 340 Vdc, allowing the windings to operate on higher bus voltages without breakdown, while the regular leadwire connection style eases in-cabinet termination.

The laminated rotor uses a three-stack construction to increase dynamic stiffness, and the overall body length measures 201 mm. A NEMA 42 frame code means the motor shares mounting dimensions and shaft center height with other motion elements in that size class. Insulation resistance is rated at 100 Megohms, and operation is permitted from −20 °C to +40 °C without derating. Standard windings and the absence of an internal feedback device keep wiring simple for open-loop microstepping drives that monitor phase current directly.