Technical Data for ELKA Precision's 250,000RPM maximum speed hydrostatic internal grinding spindle:

• Speed Range:
  20,000 - 250,000 RPMs
• Built-In Permanent Magnets Motor
• Maximal continuous power:
  1.3 kW
• Feedback: No
• Cartridge Type Spindle with Flange Clamping; Cartridge Diameter:
  100 mm
• Tool Clamping Interface
  Pilot Diameter/Thread:
  5.5 mm / M5
• Oil Viscosity @ 40 Degrees C:
  2.2 cst
• Supply Pressure:
  60 Bars
• Radial Error Motion at all Speeds:
  <0.12 micrometers
• Axial Error Motion at all Speeds:
  <0.15 micrometers
• Friction Power Losses @ Maximal Speed:
  950 Wt
• Total Flow Rate:
  2.4 liters/min
• Pumping Power:
  240 Wt
• Total Maximal Heat Generation to be Compensated:
  1,800 kcal/hour
• Axial Stiffness at the Shaft Centerline:
  17 N/micrometer
• Axial Load Capacity at the Shaft Centerline:
  180 N
• Radial Stiffness at the Shaft Front Flange:
  4 N/micrometer
• Radial Load Capacity
  at the Shaft Front Flange:
  45 N
• Power Dissipation in Stator
  Windings at Maximal Load:
  880 Wt

Contact ELKA Precision today for more information on our 250,000 RPM hydrostatic spindle, or your custom hydrostatic needs.

250,000 RPM Hydrostatic Internal Grinding Spindle
model # ELP 250/1.3-IG

Accuracy & Reliability
ELKA Precision hydrostatic spindles have proven to provide extremely precise internal grinding capabilities, and will maintain excellent performance even in the toughest situations. Our spindles are currently used throughout the world for a variety of precision applications, and can be custom-fitted to suit your exact specifications. With precise rotational accuracy and lasting vibration resistance, our 250,000 RPM spindle has tested accurate, is proven to be dependable and is ready to provide you with unmatched grinding efficiency and quality.

250,000 RPM Hydrostatic Internal Grinding Spindle
Dynamic Response at the Shaft Front Flange to 100 N Force

0.09μm Synchronous Radial Error Motion @ 167,000RPM

ELKA’s Precision offers a wide range of hydrostatic work head grinding spindles, milling spindles and internal grinding spindles. Please contact us for more information on our 250,000 RPM spindle, or for any of your hydrostatic grinding needs.