AS2021-0D00 Beckhoff
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The Beckhoff AS2021-0D00 is part of the AS Stepper Motors series and features a 56 mm flange size with a 6.35 mm shaft diameter. It delivers a holding torque of 0.83 Nm, a breakdown torque of 0.63 Nm, and operates at a nominal current of 2.0 A. The motor is rated for IP54 protection class and can handle a maximum axial load of 15 newtons.
Internal Product Review
The Beckhoff AS2021-0D00 is an AS stepper motor with 0.83 Nm holding torque and 1.8° resolution. IP54 protection and a 120 °C maximum winding temperature support stable service in demanding automation panels. A strong technical option for precise indexing and dependable stepper performance.
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Product Description:
The AS2021-0D00 is a two-phase stepper motor manufactured by Beckhoff as part of the AS Stepper Motors series. By advancing the rotor in fixed angular increments, the device delivers precise open-loop positioning for conveyors, laboratory dispensers, and other motion axes where repeatable displacement is required without closed-loop feedback. The square housing uses a 56 mm flange, so it can bolt directly to NEMA 23 gearheads, while the pilot diameter of 38.1 mm centers the motor on mating brackets.
Four mounting holes, each 4.5 mm in diameter, accept standard cap screws for rigid attachment. A 6.35 mm shaft diameter provides a common interface for pulleys or couplings, and the available holding torque of 0.83 Nm keeps the shaft stationary when phase currents are present. The stator consumes a nominal phase current of 2.0 A, and its 0.80 Ω winding resistance determines the voltage required for rated static torque. Electrical dynamics are influenced by a winding inductance of 3.8 mH and a back-EMF constant of 239 mV/(rad/s), which affect current rise time and speed limits. The motor has a 1.8° step angle with 200 full steps per revolution, providing predictable resolution for drive microstepping algorithms. Its enclosure meets the IP54 protection class, so it resists dust ingress and splashing liquids during machine installation.
An axial load capacity of 15 N supports belt tension or light thrust applications, while a radial load capacity of 63 N permits side-loaded pulley drives at the shaft shoulder. During acceleration, the rotor can momentarily reach a breakdown torque of 0.63 Nm before stalling. Its stored kinetic energy is characterized by a rotor inertia of 0.210 kg·cm², which helps with selecting suitable drives and motion profiles. The copper windings may reach a maximum temperature of 120 °C, establishing the thermal limit for continuous operation. Operating the motor within this limit helps prevent excessive winding temperatures during sustained loads and repeated motion cycles.
