Product Line
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VEXTA®
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Motor Type
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2-Phase Full/Half-step
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Speed-Torque Characteristics
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![](/ImgSmall/umk264ba_stc.jpg) Graph
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Holding Torque
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55 oz-in
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Frame Size
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2.22 in
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Power Supply
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Single-Phase 100-115 VAC
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Type
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Standard
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Step Angle
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1.8 °
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Shaft/Gear Type
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Round Shaft (No Gearhead)
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Shaft
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Single
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Rotor Inertia
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0.66 oz-in²
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RoHS Compliant
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Yes
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Components
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PK264-02A (Motor) UDK2120A (Driver)
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Insulation Class
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[Motor] Class B [266°F (130°C)]
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Insulation Resistance (Motor)
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100 MΩ under normal temperature and humidity, when measured by a 500 VDC megger between the motor coils and casing.
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Insulation Resistance (Driver)
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100 M Ω minimum under normal temperature and humidity, when measured by a 500 VDC megger between: Case-Power input terminal, Case-Signal input/output terminal, Power input terminal-Signal input/output terminal
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Dielectric Strength (Motor)
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Sufficient to withstand 0.5 kV, 60 Hz applied between the motor coils and casing for 1 minute, under normal temperature and humidity.
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Dielectric Strength (Driver)
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Sufficient to withstand the following for 1 minute under normal temperature and humidity: Case-Power input terminal 1.0 k VAC 60 Hz, Case-Signal input/output terminal 1.0 k VAC 60 Hz, Power input terminal-Signal input/output terminal 1.0 k VAC 60 Hz
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Ambient Temperature Range
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[Driver] 32°F ~ 104°F (0°C ~ 40°C) (nonfreezing) [Motor] 14°F ~ 122°F (-10° ~ 50°C) (nonfreezing)
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Ambient Humidity
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85% or less (noncondensing)
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Operating Atmosphere
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No corrosive gases, dust, water or oil.
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Temperature Rise
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Temperature rise of the coil measured by the Change Resistance Method is 144ºF (80ºC) or less (at standstill, two phases energized).
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Shaft Runout
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0.002 in (0.05 mm) T.I.R. at top of output shaft
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Concentricity
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0.003 in. (0.075 mm) T.I.R.
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Perpendicularity
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0.003 in. (0.075 mm) T.I.R.
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Stop Position Accuracy
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±2 arc minutes (±0.034º)
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Radial Play
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0.001 inch (0.025 mm) max. of 1.12 lb. (5 N)
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Axial Play
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0.003 in (0.075 mm) max. of 2.2 lb. (10 N)
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