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Autonics A4K-S564-B 5-Phase Built-in Brake Stepper Motor


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If this item is out of stock, the lead time may take up to 2 weeks. We will contact you individually with a status update after your order is placed.


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The Autonics A4K-S564-B is a compact 5-phase stepper motor featuring a built-in electromagnetic brake. As the most compact model in the 60mm frame series, it offers a maximum stop torque of 4.2 kgf·cm (0.42 N·m). This "S" type model operates at a rated current of 0.75 A/Phase, making it an energy-efficient option suitable for drivers designed for lower current output compared to "M" or "G" types. The integrated B-type brake provides reliable position holding during power outages (Power OFF = Lock), ensuring safety in vertical drive systems and equipment requiring fail-safe braking.

Key Features

  • Compact Torque Output: Delivers a maximum stop torque of 4.2 kgf·cm (0.42 N·m), ideal for applications requiring the stability of a 60mm frame with lighter torque loads.

  • Built-in Safety Brake: Equipped with a normally closed electromagnetic brake that locks the shaft when power is turned off, preventing load drops.

  • Rated Current 0.75 A/Phase: Designed for 0.75 A/Phase operation ("S" Type), ideal for low-current drivers and energy-sensitive applications.

  • Standard 60mm Frame: Matches the mounting dimensions of higher-torque models (A8K/A16K) but features a shorter motor length for space-saving installation.

  • Precision 5-Phase Control: Supports a basic step angle of 0.72° (Full step) and 0.36° (Half step) for smooth and accurate positioning.

Technical Specifications

  • Model: A4K-S564-B

  • Frame Size: 60 mm

  • Shaft Type: Single Shaft (Built-in Brake)

  • Max. Stop Torque: 4.2 kgf·cm (0.42 N·m)

  • Rated Current: 0.75 A/Phase (S Type)

  • Brake Power: 24 VDC (Non-polar)

  • Brake Static Friction Torque: ≥ 8.0 kgf·cm (0.8 N·m)

  • Rotor Inertia: 175 x 10⁻⁷ kg·m²

  • Basic Step Angle: 0.72° / 0.36°

  • Unit Weight: Approx. 1.05 kg

<Motor Specification>

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