Grinding spindle DQFYM-20904

motorizedwater-cooledmanual tool change

Overview
The DQFYM-20904 is a semiconductor grinding spindle engineered for 300 mm (12 inch) grinding wheels. It is optimized for wheel capacity and continuous torque rather than maximum rotational speed, providing 18 N·m continuously (S1) and 27 N·m intermittently (S6-40%) up to 4,000 rpm.

Key specifications
Diameter: Φ208.5 mm
Grinding wheel: 300 mm / 12 inch
Maximum speed: 4,000 rpm
Torque (S1): 18 N·m
Torque (S6-40%): 27 N·m
Power (S1): 7.5 kW

Technical data
Diameter: Φ208.5 mm
Max. speed: 4,000 rpm
Grinding wheel dimensions: 300 mm / 12 inch
Bearing type: Air bearing
Max. frequency: 266 Hz
Motor system: Synchronous motor
Rated voltage: 220 V
Power output S1 100%: 7.5 kW
Power output S6 40%: 11.25 kW
Output torque S1 100%: 18 N·m
Output torque S6 40%: 27 N·m
Rated current S1 100%: 23.5 A
Rated current S6 40%: 32.5 A
Gas flow (air bearing): 60–90 L/min at 0.65 MPa
Cooling system: Water cooling
Cooling flow rate: ≥ 3.5 L/min
Motor temperature sensor: KTY84-130
Tool change: Manual
Vibration velocity: 0.15 mm/s
Weight: 150.5 kg

Features / technical specifications

• Model: DQFYM-20904
• Spindle diameter: Φ208.5 mm
• Grinding wheel compatibility: 300 mm / 12 inch
• Maximum speed: 4,000 rpm (Max. frequency 266 Hz)
• Bearing: Air bearing suitable for precision grinding
• Motor system: Synchronous with water cooling
• Rated voltage: 220 V
• Power output S1 (100%): 7.5 kW; S6 (40%): 11.25 kW
• Torque S1 (100%): 18 N·m; S6 (40%): 27 N·m
• Rated current S1 (100%): 23.5 A; S6 (40%): 32.5 A
• Air supply for bearing: 60–90 L/min (0.65 MPa)
• Cooling: Water cooling, flow ≥ 3.5 L/min
• Motor temperature sensor: KTY84-130
• Tool change: Manual
• Vibration velocity: 0.15 mm/s
• Weight: 150.5 kg