MTDH21NR-HTLNN-NS50 Pacific Scientific
Wake Industrial LLC is not an authorized distributor of this product.
The Pacific Scientific MTDH21NR-HTLNN-NS50 is part of the POWERMAX II M Motors series and features an enhanced construction type with a frame width of 2.25 inches and a motor length of 2.06 inches. This motor has a single smooth shaft with a diameter of 0.25 inches and offers 200 steps per revolution with a step angle of 1.8 degrees. The insulation is rated at Class B for up to 130°C, with a voltage rating of 340 VDC and a resistance of 100 Megohms.
Internal Product Review
The MTDH21NR-HTLNN-NS50 is a Pacific Scientific POWERMAX II M stepper motor with a 1.8-degree step angle and 200 steps per revolution. Enhanced construction and a max-torque-at-low-speed winding give the motor a very capable feel in precise positioning service. A strong choice for compact indexing applications, highlighted by ±1.5% step accuracy.
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Product Description:
The MTDH21NR-HTLNN-NS50 is a two-phase stepper motor manufactured by Pacific Scientific for the POWERMAX II M Motors series. It employs a laminated rotor and a single smooth shaft to convert commanded pulse trains into incremental motion, serving pick-and-place modules, syringe pumps, and other equipment that require repeatable positioning without closed-loop feedback. Its compact assembly keeps moving mass low and reduces settling time in dynamic axes.
Mechanical integration is governed by a 2.625 in bolt-circle diameter, a 1.500 in pilot diameter, and 0.200 in mounting holes that accept standard machine screws. The housing has a frame width of 2.25 in and an enhanced construction rating with a winding designed for maximum torque at low speed. The electrical insulation meets Class B limits at 130 °C and withstands a 340 VDC potential between the coil and frame. Continuous operation is permitted from -20 °C to +40 °C, while a step angle of 1.8 degrees provides the fundamental motion increment. The motor also has a step accuracy of ±1.5%, supporting precise open-loop indexing.
The electrical interface uses a four-lead parallel configuration terminated in 22 AWG conductors that extend from the frame with a minimum length of 12 in, allowing direct connection to low-inductance microstepping drives. The internal insulation provides a resistance of 100 megohms, limiting leakage current in electrically noisy cabinets. The motor completes 200 steps per revolution, and each full step can be subdivided electronically for finer positioning. The cylindrical package has an overall length of 2.06 in, while the output journal projects 0.81 in from the housing. Its 0.2500 in shaft diameter accommodates commonly available couplings. Dynamic load peaks remain within the bearing ratings when the motor operates at typical automation speeds.
