SFI Series 618W 48VDC Frameless Torque Motor 9.51Nm 115mm Frame Diameter

This SFI Series frameless inner-rotor torque motor features a 48VDC voltage, 618W rated power, 620RPM rated speed and 9.51Nm 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: 115SFI50-4862-951B
• Voltage: 48VDC
• Rated Power: 618W
• Number of Poles: 30
• Rated Torque: 9.51Nm
• Maximum Instantaneous Torque: 19Nm
• Rated Speed: 620RPM
• Maximum Speed: 651RPM
• Rated Current: 15.1±5%A
• Maximum Instantaneous Current: /±5%A
• Torque Constant: 0.293Nm/A
• Back EMF Constant: 52.1V/krpm
• Insulation Class: F
• Ambient Temperature: -20~40℃

Physical Specification

• Outer Diameter: 115mm
• Rotor Inner Diameter: 74mm
• Total Height: 64mm