KC-20HYB28L4 NEMA 8 Lead Screw Stepper Motor | Tr3.5 Through-Shaft Linear Actuator

Technical Specification
KC-20HYB28L4
Lead Screw Stepper Motor — Optimized for durable integration and precise linear motion control.
Motor Type
NEMA 8 External Nut
Screw Spec
Tr3.5 × 1.2 (P1.2)
Step Angle
1.8° ± 5%
Rated Current
0.5 A / Phase
Holding Torque
12 mN·m (min.)
Axial Length
150 ± 1 mm
✓ Custom samples: 10-20 days
✓ Bulk order pricing available
✓ ISO 9001, CE & RoHS Compliant
Applications: Precision medical instrumentation, laboratory automation, microfluidic pumps, automated pipettes, surgical robotics, semiconductor inspection equipment, optical positioning stages, laser focusing systems, handheld portable devices, electronic valve control, miniature XY stages, capillary electrophoresis, 3D bioprinting, aerospace cockpit instrumentation, telecommunications fiber alignment, smart locks, and compact fluid dispensing systems.
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KC-20HYB28L4 External Nut Hybrid Stepper Motor Technical Data

Performance Testing Data

Electrical Parameter Test Conditions & Values
Rated Voltage 2.75 V
Rated Current Per Phase 0.5 A
Phase Resistance 5.5 ± 10% Ω (at 20 °C)
Phase Inductance 1.8 mH ± 20% (1 kHz 1 V RMS)
Holding Torque 12 mN·m (min.)
Detent Torque 10 g·cm ref.
Dielectric Strength 500 V AC / 1 min / 5 mA (max.)
Insulation Resistance 100 MΩ at 500 V DC

Physical and Mechanical Specifications

Mechanical Parameter Detailed Specification
Step Angle 1.8° ± 5%
Phase Number 2 phases
Lead Screw Specification Tr3.5 × 1.2 (P1.2)
Overall Screw Length 150 ± 1 mm
Motor Body Length 28 mm max.
Mounting Interface 20 mm NEMA 8 standard
Insulation Class Class B (130 °C)
Temperature Rise 80 K max.
Lead Wire Type UL1571 AWG28

KC-20HYB28L4 Precise Dimension Reference and Technical Drawing

Dimensional specifications for system integration | Values in millimeters (mm)

Kechen Motor KC-20HYB28L4 2D drawing of through-shaft lead screw motor with Tr3p5 screw and dual shaft.

Engineering Reference: KC-20HYB28L4 Series Hybrid Stepper Motor Mechanical Outline

Engineered Performance Advantages

  • Optimized Thermal Management: Class B (130 °C) insulation with a controlled 80 K temperature rise ensures durable operation in high-density environments.
  • Precise Motion Control: 1.8° step angle and Tr3.5 lead screw integration provide reliable positioning accuracy for industrial automation.
  • Stable Electrical Integration: Optimized 2.75 V rated voltage and 0.5 A phase current compatible with standard stepper drivers.
  • High-Strength Dielectric Protection: 500 V AC dielectric strength and 100 MΩ insulation resistance ensure electrical safety and long-term stability.
  • Versatile Mechanical Interface: Standard NEMA 8 (20 mm) frame combined with a 150 mm precise lead screw for flexible integration.
Technical Key Search Terms
KC-20HYB28L4 | NEMA 8 hybrid stepper motor | 2-phase 1.8 degree motor | 2.75 V stepper motor | Tr3.5 lead screw motor | Industrial motion control component | Precise positioning stepper | Class B insulation motor | 20 mm stepper motor specifications | Custom lead screw motor | Bipolar stepper motor 0.5 A

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