NEMA 17 Economy Geared Stepper: This compact geared stepper motor has a frame size 42x42mm with rated current 1.68A, integrated with a PG series planetary gearbox that has a wide range of gear ratio 4 to 139. It is an ideal choice for the applications that require high torque or low speed but high precision motion control.
NEMA 17 Economy Geared Stepper Specification
- Part Number: 42AI40-1684S-PG
- Step Angle: 1.8deg w/o gearbox
- Bi/Unipolar: Bipolar
- Holding Torque: 0.45Nm w/o gearbox
- Rated Current/phase: 1.68A
- Insulation Class: B 130°C
- Frame Size: 42x42mm
- Motor Length: 40mm
- Number of Leads: 4
- Lead Length: 500mm
- Gearbox Type: Planetary
- Gear Ratio: 4-139:1
- Efficiency: 90%-70%
- Backlash at No-load: 1.0deg-2.0deg
- Gearbox Length: 29.2mm-44.6mm
- Shaft Diameter: Φ8mm
- Shaft Length: 20mm
- D-cut Length: 15mm
Overall Size

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