Fukudaco, Japan
Fukudaco Hydrostatic Spindle
Manufacturer: Fukudaco
Overview
We support high-precision machining with our uniquely developed PM controller and specialized bearings.
Applications
- Grinding machine wheel spindles and worked spindles
- Lathe spindles
- Machining center tool spindles and more
Features
- Minimal wear
- High rigidity
- High damping capacity
- High precision
- Reduced friction and pump loss (approximately one-third that of capillary tubes)
- Capable of handling high loads even at high speeds (without loss of rigidity)
Custom-Designed Hydrostatic Spindles
We design and manufacture hydrostatic spindles according to your specifications. Below are examples of past projects.
Built-in motor-driven grinding spindle
- Revolution speed: 7,600 min -1
- Pump pressure: 6.3 MPa
- Oil viscosity: ISO VG2
- Load capacity: 2,000 N
- Rigidity: 320 N/µm (with grinding wheel)
- Motor power: 50 kW
- The auto balancer can be installed
Built-in motor-driven work head spindle
- Revolution speed: 6,000 min -1
- Pump pressure: 5.0 MPa
- Oil viscosity: ISO VG2
- Load capacity: 500 N
- Rigidity: 80 N/µm (at workpiece)
- Motor power: 6.3 kW
- Rotational accuracy: < 0.15 µm
Built-in motor-driven lathe spindle
- Tip shape: DIN 55021 A8
- Revolution speed: 6,000 min -1
- Pump pressure: 6.3 MPa
- Oil viscosity: ISO VG2
- Load capacity: 10,000 N
- Stiffness: >1,000 N/µm
- Rotational accuracy: < 0.3 µm
Built-in motor-driven lathe spindle
- Tip shape: DIN 55021 A5
- Revolution speed: 7,000 min -1
- Pump pressure: 8.0 MPa
- Oil viscosity: ISO VG2
- Load capacity: 6,300 N
- Stiffness: >1,000 N/µm
- Motor power: 20 kW
Built-in motor-driven milling spindle
- Tip shape: HSK-E40
- Revolution speed: 42,000 min -1
- Pump pressure: 8.0 MPa
- Fluid: Emulsion or water
- Load capacity: 500 N
- Stiffness: 160 N/µm
- Motor power: 15 kW
Belt Drive Grinding Spindle
- Revolution speed: 3,000 min -1
- Pump pressure: 5.0 MPa
- Oil viscosity: ISO VG4
- Load capacity: 2,000/4,000 N
- Stiffness: > 400 N/µm (at the grinding wheel)
- The auto balancer can be installed
Belt-Driven Cam Grinding Spindle
- Revolution speed: 25,000/30,000 min -1
- Pump pressure: 6.3 MPa
- Oil viscosity: ISO VG2
- Load capacity: 750/500 N
- Stiffness: > 120/60 N/µm (at grinding wheel)
- Shaft to body edge dimension: 24/16 mm
- Recommended grinding wheel diameter: φ70/φ50 mm (CBN)
SiC wafer grinder spindles, rotary tables
- Revolution speed: 4,000 min -1
- Pump pressure: 5.0 MPa
- Load capacity (radial/axial): 1,000 N/±1,000 N
- Bearing stiffness (radial/axial): 440 N/µm/1,000 N/µm
- Runout accuracy (radial/axial): 0.03µm/0.02µm
- Uses special liquid instead of oil
- Higher rigidity than air spindles used in silicon grinders
Rotary table
- Table diameter: φ250mm
- Revolution speed: 600 min -1
- Pump pressure: 5.0 MPa
- Maximum weight of workpiece + chuck: 100 kg
- Radial bearing load capacity: 1,000 N
- Tilt torque: 100 Nm
- Position accuracy: Less than 0.20µm (encoder control)
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