SFO Series 120W 24VDC Outer-Rotor Frameless Torque Motor 1.2Nm 89.5mm Frame Diameter

This SFO Series frameless outer-rotor torque motor features a 24VDC voltage, 120W rated power, 950RPM rated speed and 1.2Nm rated torque. With a frameless outer-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: 81SFO15-2412-120B
• Voltage: 24VDC
• Rated Power: 120W
• Number of Poles: 42
• Rated Torque: 1.2Nm
• Maximum Instantaneous Torque: 2.4Nm
• Rated Speed: 950RPM
• Maximum Speed: 1140RPM
• Rated Current: 5.8±5%A
• Maximum Instantaneous Current: 11.6±5%A
• Torque Constant: 0.22Nm/A
• Back EMF Constant: 13.92V/krpm
• Insulation Class: B
• Ambient Temperature: -20~40℃

Physical Specification

• Outer Diameter: 89.5mm
• Rotor Inner Diameter: 58.5mm
• Total Height: 24mm