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  • HydroRound Hydrostatic Rotary-Bearing Table
Aug 2005
AMETEK Precitech Inc.Request Info
For Nanoform and Freeform Systems
KEENE, N.H., Aug. 8 -- Precitech, a provider of ultraprecision machining products, has introduced the HydroRound hydrostatic rotary-bearing table, which it designed in collaboration with the Massachusetts Institute of Technology. The HydroRound features a self-compensating restrictor with what the company calls industry-leading accuracy and moment stiffness. It was designed for Precitech's Nanoform and Freeform systems to perform 3-axis-tool normal diamond turning and parallel grinding as well as high-performance 4- and 5-axis raster milling and grinding.

Using an uncompensated HydroRound Rotary B-axis, the following tests were performed on a 75-mm-diameter ElNi (electroless nickel) test piece with a 254-mm convex radius to prove the overall quality of the HydroRound configured to a standard 2-axis, Nanoform700 machine: 2-axis diamond turning (with B-axis locked down), -1.423-nm surface roughness; 2-axis diamond turning (with B-axis active), -1.553-nm surface roughness; tool normal diamond turning, -1.426-nm surface roughness.

Precitech said part-cutting performance was not affected by integrating an additional axis to the Nanoform 700 platform. Users can incorporate an additional axis for advanced capability without compromising part performance.

For more information, visit:; e-mail:

Precitech Inc.
44 Blackbrook Road
Keene, NH 03431
Phone: (603) 357-2511
Fax: (603) 358-6174


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