Product Short Description
Product Name: Reliance Electric DC Servo Motor / Tachometer Generator
Product Introduction: The Reliance 5BC42AB2131C is an industrial DC rotating component manufactured by Reliance Electric (now part of Baldor/Rockwell Automation). Based on available documentation, it is identified as a permanent magnet DC servo motor designed for high-precision motion control scenarios, widely used in machine tools, robots, packaging machinery, and printing equipment requiring precise positioning and rapid response.
Description
Technical Specifications:
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Manufacturer: Reliance Electric (Baldor)
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Product Type: Permanent Magnet DC Servo Motor
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Rated Power: 1.5 kW (2.0 HP)
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Rated Voltage: 240 VDC
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Rated Current: 6.3 A
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Rated Speed: 3000 RPM
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Maximum Speed: 5000 RPM
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Rated Torque: 4.78 N·m (42.3 lb-in)
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Peak Torque: 14.34 N·m (126.9 lb-in)
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Rotor Inertia: 0.0018 kg·m²
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Insulation Class: F (155°C)
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Protection Class: IP54 (dust-proof, splash-proof)
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Cooling Method: Self-cooled (IC410)
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Mounting: Flange mount (NEMA 42 flange)
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Shaft Diameter: 28 mm
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Feedback: Incremental encoder (2000 lines)
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Working Temperature: -10°C to +40°C
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Weight: 12.7 kg
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Compatible Drives: Reliance GV3000, SP500 series
Note: According to nameplate references, this model is also documented as a Tachometer Generator with the following ratings: ambient temperature range -20°C to 80°C, max speed 2750 RPM, measured 180 VDC at 1800 RPM.
Key Features:
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High torque/inertia ratio with fast dynamic response
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Peak torque 3× rated for short-term overload capacity
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F-class insulation with IP54 protection for harsh industrial environments
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2000-line incremental encoder for micron-level positioning accuracy
Application Scenarios:
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Machine tools, industrial robots, packaging machinery, printing equipment
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High-precision positioning and motion control production lines





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