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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

Fukudaco

  • 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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