SFI Series 440W 48VDC Frameless Torque Motor 1.44Nm 85mm Frame Diameter

This SFI Series frameless inner-rotor torque motor features a 48VDC voltage, 440W rated power, 2920RPM rated speed and 1.44Nm rated torque. With a frameless inner-rotor design and no traditional housing, shaft, bearings, or end covers, the motor can be directly integrated into mechanical structures for a more compact and lightweight system. Designed for high acceleration, frequent start-stop operation, and space-constrained applications, it is ideal for robots, aerospace equipment, precision machinery, medical devices, and other high-end automation systems.

Key Features

• Low cogging torque for smooth operation
• High dynamic response with excellent heat dissipation
• Built-in thermistor for real-time motor temperature monitoring
• Large inner through-bore design, compatible with encoders, cables, hoses, and more
• Standardized dimensions optimized to match mainstream harmonic reducers on the market

Electrical Specification

• Part Number: 85SFI13-4844-144B
• Voltage: 48VDC
• Rated Power: 440W
• Number of Poles: 20
• Rated Torque: 1.44Nm
• Maximum Instantaneous Torque: 2.88Nm
• Rated Speed: 2920RPM
• Maximum Speed: 4190RPM
• Rated Current: 11.8±5%A
• Maximum Instantaneous Current: 24±5%A
• Torque Constant: 0.134Nm/A
• Back EMF Constant: 8.1V/krpm
• Insulation Class: F
• Ambient Temperature: -20~40℃

Physical Specification

• Outer Diameter: 85mm
• Rotor Inner Diameter: 52mm
• Total Height: 27.2mm
• Weight: 0.4kg