NEMA17 KS42STH34-1304A-01F Stepper Motor

Motor Overview

• Motor Type: Bipolar Stepper Motor
• Frame Size: NEMA 17 (42 mm x 42 mm)
• Part Number: KS42STH34-1304A-01F
• Step Angle: 1.8°
• Steps per Revolution: 200 steps/revolution

Electrical Specifications

• Rated Current/Phase: 1.3 A
• Rated Voltage: Dependent on the driver; typically calculated using current and coil resistance.
• Phase Resistance: 2.8 Ω ± 10% (per phase)
• Phase Inductance: 3.2 mH ± 20% (per phase)
• Driving Mode: Bipolar (2-phase excitation)

Mechanical Specifications

• Body Length: 34 mm
• Shaft Diameter: 5 mm (D-cut type)
• Shaft Length: 20 mm
• Weight: ~0.25 kg (250 grams)
• Mounting Holes: 4 x M3 threaded holes on 31 mm x 31 mm centers
• Lead Wire Count: 4 wires (bipolar configuration)
• Lead Wire Length: Typically 30–50 cm, with a pre-attached connector (depending on supplier).

Performance Specifications

• Holding Torque: 36 N·cm (3.6 kg·cm or ~50.94 oz·in)
• Detent Torque: ~2.2 N·cm
• Rotor Inertia: 54 g·cm²
• Max Operating Speed: Up to ~600 RPM, depending on load and driver configuration.
• Maximum Microstepping: Dependent on the driver (commonly 1/16 or 1/32 step).

Thermal and Environmental Specifications

• Max Operating Temperature: 80°C
• Insulation Resistance: >100 MΩ at 500 V DC
• Insulation Class: Class B (130°C max)
• Storage Temperature: -20°C to 85°C
• Humidity Range: 15% to 90% (non-condensing)

Wiring Configuration

• Wire Color and Phases:
  • Red: Phase A+
  • Blue: Phase A-
  • Green: Phase B+
  • Black: Phase B-

Applications

• 3D printers
• CNC machines
• Robotics
• Automated positioning systems
• Precision control devices

Mounting Dimensions

• Mounting Face: 42 mm x 42 mm square flange
• Bolt Circle Diameter: 31 mm
• Shaft Center to Mounting Hole Distance: 21.5 mm