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VELMEX, Inc.
Item # PK268-03A, Stepper Motor

Item # PK268-03A, Stepper Motor

Product catalog summary

Overview: The PK268-03A is a standard stepper motor from the VEXTA® product line, known for its balanced performance with high torque, low vibration, and low noise.

Specifications:

Motor Type: 2-Phase
Motor Frame Size: 2.22 inches square
Shaft Type: Round Shaft (No Gearhead)
Holding Torque: 240 oz-in (Bipolar Series), 191 oz-in (Unipolar)
Connection Type: Bipolar (Series) and Unipolar
Lead Wires: 6
Current per Phase: 2.1 A (Bipolar Series), 3 A (Unipolar)
Voltage: 4.2 VDC (Bipolar Series), 3 VDC (Unipolar)
Resistance: 2 Ω/phase (Bipolar Series), 1 Ω/phase (Unipolar)
Inductance: 6.4 mH/phase (Bipolar Series), 1.6 mH/phase (Unipolar)
Step Angle: 1.8°
Rotor Inertia: 2.6 oz-in²
RoHS Compliant: Yes

Performance and Safety:

Insulation Resistance: 100 MΩ or more at 500 VDC
Dielectric Strength: Withstands 1.0 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.) maximum of 5 N (1.12 lb.)
Axial Play: 0.075 mm (0.003 in.) maximum of 10 N (2.2 lb.)
Step Accuracy: ±3 arc minutes (±0.05°)

Catalog excerpts

Item # PK268-03A, Stepper Motor Stepper Motor The standard PK series stepper motor offers balanced performance enhanced by high torque, low vibration and low noise. SPECIFICATIONS Product Line Motor Type Motor Frame Size Shaft/Gear Type Round Shaft (No Gearhead) Holding Torque Bipolar (Series) 240 oz-in Unipolar 191 oz-in Connection Type Lead Wires Bipolar (Series) Unipolar

Open the catalog to page 1

Current per Phase (A/phase) 2.1 [Bipolar (Series)] 3 [Unipolar] Resistance (Ω/phase) Inductance (mH/phase) Step Angle Rotor Inertia (oz-in2) RoHS Compliant Insulation Resistance 4.2 [Bipolar (Series)] 3 [Unipolar] 2 [Bipolar (Series)] 1 [Unipolar] 6.4 [Bipolar (Series)] 1.6 [Unipolar] 100 M Ω or more when 500 VDC megger is applied between the windings and the case under normal ambient temperature and humidity. Dielectric Strength Sufficient to withstand 1.0 kVAC at 50 Hz or 60 Hz applied between the windings and the case for 1 minute under normal ambient temperature and humidity. Temperature...

Open the catalog to page 2

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