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VELMEX, Inc.
Item # PK243B1A-SG18, Stepper Motor

Item # PK243B1A-SG18, Stepper Motor

Product catalog summary

Product Overview: The PK243B1A-SG18 is a stepper motor from the VEXTA® product line, designed for high resolution, high torque, and smooth low-speed rotation. It incorporates SH gears with high permissible torque.

Specifications:

Motor Type: 2-Phase
Motor Frame Size: 1.65 inches square
Shaft/Gear Type: Spur Gear
Gear Ratio: 18:1
Holding Torque: 112 oz-in
Connection Type: Bipolar (Series) and Unipolar
Lead Wires: 6
Current per Phase: 0.67 A (Bipolar Series), 0.95 A (Unipolar)
Voltage: 5.6 VDC (Bipolar Series), 4 VDC (Unipolar)
Resistance: 8.4 Ω/phase (Bipolar Series), 4.2 Ω/phase (Unipolar)
Inductance: 10 mH/phase (Bipolar Series), 2.5 mH/phase (Unipolar)
Step Angle: 0.1°
Rotor Inertia: 0.191 oz-in²
RoHS Compliant: Yes

Performance and Safety:

Insulation Resistance: 100 MΩ or more at 500 VDC
Dielectric Strength: Withstands 0.5 kVAC at 50/60 Hz for 1 minute
Temperature Rise: 176°F (80°C) or less
Insulation Class: Class B [266°F (130°C)]
Ambient Temperature Range: 14 ~ 122°F (-10 ~ 50°C)
Ambient Humidity: 85% or less (non-condensing)

Mechanical Specifications:

Shaft Runout: 0.05 mm (0.002 in.) T.I.R.
Concentricity: 0.075 mm (0.003 in.) T.I.R.
Perpendicularity: 0.075 mm (0.003 in.) T.I.R.
Radial Play: 0.025 mm (0.001 in.) max at 5 N (1.12 lb.)
Axial Play: 0.075 mm (0.003 in.) max at 10 N (2.2 lb.)

Catalog excerpts

Stepper Motor Incorporating the SH gears with high permissible torque delivers high resolution, high torque and smooth low-speed rotation SPECIFICATIONS Product Line

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