• Autonics AK-2 Series 2-Phase Stepper Motors (42/56 mm Frame)
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Autonics AK-2 Series 2-Phase Stepper Motors (42/56 mm Frame)

Autonics AK-2 Series 2-Phase Stepper Motors (42/56 mm Frame)

Compact, lightweight 2-phase hybrid stepper motors in 42 mm and 56.4 mm square frames. They deliver high precision, high speed and high torque for small automated equipment at an economical cost.

Key features

  • Basic step angle 1.8° / 0.9° (full step / half step)
  • Holding torque from 0.206 N·m to 1.57 N·m
  • Connector-type wiring for compact installation
  • Single shaft standard; dual shaft (W) versions available
  • Unipolar 6-lead winding, CLASS B insulation

Specifications

Phase 2-phase (unipolar)
Frame sizes 42 x 42 mm, 56.4 x 56.4 mm
Step angle 1.8° / 0.9° (full / half step)
Rated current 1.2 A/phase (42 mm), 2.0 A/phase (56 mm)
Insulation class CLASS B (130 °C)
Insulation resistance 100 MΩ min. (500 VDC megger)
Dielectric strength 0.5 kVAC 50/60 Hz for 1 min
Ambient temperature 0 to 50 °C (storage -20 to 70 °C)
Ambient humidity 20 to 90 % RH (non-condensing)
Protection IP30 (IEC 34-5)
Source Autonics AK-2 Series catalogue
A2K-M243 Frame: 42 mm | Holding torque: 0.206 N·m | Current: 1.2 A/phase | Length: 34 mm
A3K-M244 Frame: 42 mm | Holding torque: 0.297 N·m | Current: 1.2 A/phase | Length: 40 mm
A3K-M244W Frame: 42 mm | Holding torque: 0.297 N·m | Current: 1.2 A/phase | Length: 40 mm | Dual shaft
A4K-M245 Frame: 42 mm | Holding torque: 0.348 N·m | Current: 1.2 A/phase | Length: 47.5 mm
A6K-G264 Frame: 56 mm | Holding torque: 0.570 N·m | Current: 2.0 A/phase | Length: 42 mm
A6K-G264W Frame: 56 mm | Holding torque: 0.570 N·m | Current: 2.0 A/phase | Length: 42 mm | Dual shaft
A9K-G265 Frame: 56 mm | Holding torque: 0.925 N·m | Current: 2.0 A/phase | Length: 54.5 mm
A9K-G265W Frame: 56 mm | Holding torque: 0.925 N·m | Current: 2.0 A/phase | Length: 54.5 mm | Dual shaft
A16K-G268 Frame: 56 mm | Holding torque: 1.570 N·m | Current: 2.0 A/phase | Length: 77.5 mm
Stepper MotorsAutonics
9 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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Autonics AK-2 Series 2-Phase Stepper Motors (42/56 mm Frame)

Brand Autonics·Stepper Motors

Available part numbers (9)

A2K-M243, A3K-M244, A3K-M244W, A4K-M245, A6K-G264, A6K-G264W, A9K-G265, A9K-G265W, A16K-G268

How to order

Send the Autonics part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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Product codeSpec
A2K-M243Frame: 42 mm | Holding torque: 0.206 N·m | Current: 1.2 A/phase | Length: 34 mm
A3K-M244Frame: 42 mm | Holding torque: 0.297 N·m | Current: 1.2 A/phase | Length: 40 mm
A3K-M244WFrame: 42 mm | Holding torque: 0.297 N·m | Current: 1.2 A/phase | Length: 40 mm | Dual shaft
A4K-M245Frame: 42 mm | Holding torque: 0.348 N·m | Current: 1.2 A/phase | Length: 47.5 mm
A6K-G264Frame: 56 mm | Holding torque: 0.570 N·m | Current: 2.0 A/phase | Length: 42 mm
A6K-G264WFrame: 56 mm | Holding torque: 0.570 N·m | Current: 2.0 A/phase | Length: 42 mm | Dual shaft
A9K-G265Frame: 56 mm | Holding torque: 0.925 N·m | Current: 2.0 A/phase | Length: 54.5 mm
A9K-G265WFrame: 56 mm | Holding torque: 0.925 N·m | Current: 2.0 A/phase | Length: 54.5 mm | Dual shaft
A16K-G268Frame: 56 mm | Holding torque: 1.570 N·m | Current: 2.0 A/phase | Length: 77.5 mm

Need a different model, or a part not listed here? Send us your parts list →

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