Hydrostatic spindles provide chatter-free grinding even in the harshest conditions, and are dramatically more effective for difficult grinding challenges compared to ball bearing spindles.

ELKA Precision patented work head grinding spindles provide:

• rotational speeds up to 12,000 RPM
• rotational accuracy in the radial direction within 20 nanometers
• the option to improve rotational accuracy to 10 nanometers to meet special customer requirements

ELKA internal grinding spindles provide:

• rotational speeds up to 250,000 RPM
• rotational accuracy in radial direction between 30 nanometers and 90 nanometers, depending on operating speed


ELKA Precision has developed the world’s first "hybrid" spindle, which combines hydrostatic and hydrodynamic effects to increase machining capabilities and improve results. These special hybrid spindles offer:


• better thermal stability
• increased rigidity and load capacity
• significantly reduced grinding cycles

Grinding with CBN Wheels
Grinding processes which utilize CBN (Cubic Boron Nitride) wheels are extremely sensitive to the dynamic stability, stiffness and rotational accuracy of spindles, and require very high grinding wheel surface speeds. ELKA's ultra-high speed hydrostatic spindles provide ultra-precise accuracy and performance, often making them an ideal choice for grinding applications which use a CBN wheel.

Contact ELKA Precision today for more information on our high-speed hydrostatic grinding spindles and to improve your precision grinding operations.

ELKA Precision designs, develops and manufactures the world’s leading hydrostatic spindle products. Our spindles effectively combine extremely high rotational accuracy with exceptional vibration resistance, providing great static stiffness and a virtually infinite life span. Developed by experienced ELKA engineers, these hydrostatic spindles have been effectively utilized in many applications, including:

• Fuel Injectors - improving grinding accuracy which can reduce fuel consumption up to 10%
• Hard Disk Bearings - offering the ability to grind with extreme precision to improve performance
• Power Generator Shafts - improving turning accuracy
• Large Copper Drums - improving diamond turning capabilities for parts used in flat screens and film technologies
• Tungsten Carbide Molds - improving milling accuracy
• Telescope Lenses
• Lithography Lenses

Increased Productivity & Smoothness
Hydrostatic spindles are effective for high-precision applications, but also can substantially increase productivity in more standard grinding operations. Spindle stiffness and vibration-resistance allow for faster grinding speeds, quicker "spark-out" times and eliminate grinding "chatter". Hydrostatic spindles are also able to grind parts to an extremely fine surface finish due to their high operational accuracy, rotational repeatability and vibration-free rotation.

When grinding hardened steel, spindles developed by ELKA engineers have produced extremely low surface roughness, better than 8 nanometers Ra, which can be achieved in relatively short time depending on the size of the part being ground. In the grinding of optical components, a surface roughness with Ra measurement about approximate 1 nanometer has been achieved.

Proven Capabilities
All ELKA spindles have tested and proven accuracy and technical capabilities. Please select your desired spindle product for technical data and dynamic response charts:

• 6,000 RPM work head grinding spindle
• 12,000 RPM work head grinding spindle
• 25,000 RPM milling spindle
• 100,000 RPM internal grinding spindle with coolant supply through the shaft (100mm Cartridge)
• 100,000 RPM internal grinding spindle with coolant supply through the shaft (80mm cartridge)
• 100,000 RPM Hydrostatic Internal Grinding Spindle
  with Automatic Tool Changing HSK 20
• 120,000 RPM Internal grinding spindle
• 120,000 RPM internal grinding spindle with axial oscillations of rotating shaft
• 140,000 RPM internal grinding spindle
• 250,000 RPM internal grinding spindle

Our product’s benefits generate significant improvement in productivity for mass-production applications, because both grinding accuracy and grinding speed are improved simultaneously.

Designed for Precision
ELKA products are custom engineered to meet your exact needs and equipment specifications, providing our customers with parts that offer better accuracy and faster speeds. ELKA’s ultra-high-speed, ultra-high accuracy grinding, milling and turning spindles can be fitted to a variety of machinery, including:

• Grinding Machine Tools
• High Precision Milling Machine Tools
• High Precision Turning Machines
• Jig Grinding Machines
• Special Machinery