Model Explanation

0643: Basic model of the E643 series motor

04: Electrical / winding specification version

029: Mechanical structure / shaft end specification (1/2" smooth shaft) Technical Specifications

Motor type: Permanent magnet DC servo motor (Brush DC Servo)

Shaft diameter: 1/2 inch (approximately 12.7 mm), smooth shaft, no keyway

Encoder: None (bare motor, requires external encoder)

Brake: None

Length: Approximately 178 mm (excluding leads)

Weight: Approximately 4.5 kg

Voltage: Typical 24–90 VDC

Rated torque: Approximately 1.2–1.5 Nm (continuous)

Peak torque: Approximately 4–5 Nm

Rated speed: 2500–3000 RPM

Insulation class: Class B (130°C)

Protection class: IP40 (axial IP54)

Interface and leads

Leads: 3 (red / black / green), directly connected to the armature

Installation: Flange installation (standard servo flange)

Axial end: Smooth shaft, no keyway, no threads Core function

High response: Low inertia rotor, suitable for frequent start-stop and rapid reversing

Smooth speed regulation: DC servo characteristics, stable low-speed torque

Durable and reliable: Industrial-grade brushes and bearings, suitable for long-term continuous operation

Easy integration: Standard flange and shaft diameter, compatible with most servo drives Applicable scenarios

Industrial Automation: Labeling machines, winding machines, small CNC equipment

Precise Positioning: Feeding mechanism, fine-tuning platform, small robotic arm

Replacement / Maintenance: Replace old Electro-Craft / Reliance servo systems

Lightweight Servo Applications: Open-loop / semi-closed scenarios without encoder feedback

Operation and Maintenance

Power Supply: Match the output voltage of the driver (24–90 VDC), avoid overvoltage

Installation: Secure the flange firmly to avoid resonance; the coaxiality of the shaft end load ≤ 0.1 mm

Brush Maintenance: Check the wear of the brush every 2000–3000 hours, replace it if necessary

Bearings: Add lubricating grease every 5000 hours

Storage: In a dry, dust-proof, and corrosion-resistant environment, long-term storage requires prevention of shaft rust