MX92-FF-401U Kollmorgen
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The Kollmorgen MX92-FF-401U is part of the MX Hazardous Duty Stepper Motors series. It features a holding torque of 2.61 Newton-meters and a step angle of 1.8 degrees, with 200 steps per revolution. The motor supports a rated current of 7.0 Amps per phase and has a weight of 4.1 kilograms.
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Product Description:
The MX92-FF-401U is a two-phase stepper motor produced by Kollmorgen within the MX Hazardous Duty Stepper Motors series. Designed for classified environments where flammable gases or dust may be present, the unit converts digital pulse commands into incremental rotary motion for positioning valves, dampers, and indexing tables in automated equipment. By advancing a fixed step angle with each input pulse, the motor provides open-loop position control without an encoder, which can simplify wiring through sealed cable entries. Its two-phase design also allows use with common stepper drives that operate in full-step or microstepping modes, depending on the motion profile.
Its holding torque is rated at 2.61 N-m, giving the shaft the ability to resist external disturbance when the stator windings are energized. Each phase can draw up to 7.0 A/phase, so the drive must supply adequate current while staying within the motor’s thermal limits. The windings have a phase resistance of 0.28 Ω and an inductance of 2.8 mH, which affect current rise and the usable pulse rate. The motor advances in 1.8° steps, which equals 200 positions per mechanical revolution. Step accuracy is ±3%, so single-step positioning remains consistent under appropriate load conditions. Insulation is tested to 340 VDC with 100 MΩ resistance, allowing use on grounded 24 to 80 VDC drives.
The shaft accepts an axial force up to 222 N and a radial force of 111 N at the specified bearing location, supporting couplings such as pulleys, gears, or lead screws. Rotor inertia is 0.0174 oz-in-s², which helps balance dynamic response with load damping during start and stop sequences. The 4.1 kg housing dissipates losses through its casing, and the 1.7 °C/W thermal path supports duty cycles typical of packaging machinery operating in hazardous-duty areas. Because heat leaves through the motor body rather than an external blower, mounting contact and ambient airflow influence temperature rise during continuous operation. Proper load alignment helps reduce bearing stress and maintain consistent step response over repeated motion cycles.
Frequently Asked Questions about MX92-FF-401U:
Q: What is the maximum axial shaft load capacity of the MX92-FF-401U stepper motor?
A: The MX92-FF-401U supports an axial shaft load of up to 222 N, making it suitable for demanding vertical load applications.
Q: What holding torque does the MX92-FF-401U provide?
A: This model delivers a holding torque of 2.61 N-m, allowing it to maintain position securely even when not powered.
Q: What is the phase resistance of the MX92-FF-401U stepper motor?
A: The MX92-FF-401U features a phase resistance of 0.28 Ohm, which influences power efficiency and heat generation.
Q: What is the step angle and number of steps per revolution on the MX92-FF-401U?
A: This stepper motor offers a step angle of 1.8°, resulting in 200 steps per revolution for precise positioning.
Q: What is the rated current per phase of the MX92-FF-401U?
A: The rated current for the MX92-FF-401U is 7.0 A per phase, determining the required drive capacity for optimal performance.
