0660-04-076
May 27, 2026

0660-04-076

0660-04-076 (Electro-Craft / Reliance E660 Series Permanent Magnet DC Servo Motor) Product Overview 0660-04-076 is an E660 series high-power-density permanent magnet DC servo motor from Electro-Craft (subsequently belonging to Reliance Electric), equipped with an internal encoder and without a brake. It is designed for high-precision motion control in medium and heavy-duty automation equipment and is an industrial-grade long-life model.

Description

Model Interpretation

0660: Base model of the E660 series motor (large torque frame)

04: Winding / Electrical specification version (high voltage type)

076: Mechanical configuration / Shaft end specification (with encoder, keyed shaft) Technical Specifications

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

Shaft diameter: 5/8 inch (approximately 15.88 mm), with keyway

Encoder: Built-in incremental (500 PPR, differential signal)

Brake: None

Length: Approximately 229 mm (excluding leads)

Weight: Approximately 7.3 kg (16 lbs)

Voltage: 24–180 VDC (rated 90 VDC)

Rated torque: Approximately 2.8 Nm (continuous)

Peak torque: Approximately 8.5 Nm

Rated speed: 2500 RPM

Maximum speed: 4000 RPM

Insulation class: F grade (155°C)

Protection class: IP44 (axial IP54)

Interface and leads

Power leads: 4 (armature + ground)

Encoder leads: 6 (A/B/Z differential + power + ground)

Installation: Standard servo flange (NEMA 34 compatible)

Axial end: Keyed shaft, unthreaded Core function

High torque density: Output torque is approximately 80% higher than that of the E643 series under the same volume.

Built-in feedback: Integrated 500 PPR encoder, simplifying installation and wiring.

Wide voltage compatibility: Supports 24–180 VDC power supply, compatible with various drivers.

Low tooth槽 torque: Optimized magnetic circuit design, smooth operation at low speeds. Applicable scenarios

Industrial Automation: CNC cutting machines, packaging machinery, auxiliary axes for injection molding machines

Precise Positioning: Heavy-duty displacement tables, machine tool feed, robot joints

Replacement and Upgrading: Replace the old E643 series to enhance torque and accuracy

Medium and Heavy-duty Servo: Equipment requiring continuous large torque and closed-loop control

Usage and Maintenance

Power Supply: Recommended 90 VDC rated voltage, avoid long-term low-voltage full load

Installation: Securely fix the flange, load coaxiality ≤ 0.08 mm

Encoder: Avoid strong electromagnetic interference, cable length ≤ 10 m

Brush Maintenance: Check every 1500–2500 hours, replace if wear exceeds limit

Bearings: Supplement with high-temperature lubricating grease every 4000 hours


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