Grinding spindle DYFDM-300(320)0.6/0.75-WS

hydrostaticISOwater-cooled

INTRODUCTION
The DYFDM-300 is a hydrostatic B-axis unit designed for vertical grinding machines. It is intended for slow, high-precision rotary positioning under grinding loads rather than for high-speed wheel applications.

APPLICATION
Integration as the B-axis rotary table unit on vertical surface grinding machines and similar machine tools requiring high axial stiffness and positional accuracy.

KEY FEATURES

• Disc diameter: Φ300 mm
• Continuous output torque: 87 N·m (S1 100%)
• High axial static stiffness: ≥2500 N/μm; radial static stiffness: ≥400 N/μm
• Low rotational speed capability: max 60 rpm; two-way rotation
• Built-in synchronous motor drive: 1.3 kW, 380 V, 4 A
• Hydraulic drive using ISO VG10 and oil supply pressure 2.0–3.0 MPa
• High geometric accuracy: front radial runout ≤0.001 mm; end face runout ≤0.001 mm; rotation accuracy ≤0.0003 mm
• Recommended water cooling for thermal stability
• Approximate mass: 227 ±10 kg

TECHNICAL SPECIFICATIONS

• Model: DYFDM-300(320)0.6/0.75-WS
• Disc diameter (mm): Φ300
• Drive oil type: ISO VG10
• Oil supply pressure (MPa): 2.0-3.0
• Axial static stiffness (N/μm): ≥2500
• Radial static stiffness (N/μm): ≥400
• Front end radial runout (mm): ≤0.001
• End face runout (mm): ≤0.001
• Rotation accuracy (mm): ≤0.0003
• Drive type: Built-in motor drive
• Rotation movement: Two-way rotation
• Maximum speed (rpm): 60
• Max. Frequency (Hz): 52
• Motor system: Synchronous motor
• Rated voltage (V): 380
• Power output S1 100% (kW): 1.3
• Output torque S1 100% (N·m): 87
• Rated current S1 100% (A): 4
• Cooling system: Water cooling (recommended)
• Application area: B-axis rotary table for vertical grinding machines
• Weight (kg): 227 ±10