Details of Grant 

EPSRC Reference:	GR/L42414/01
Title:	THE DEVELOPMENT OF NOVEL POROUS CERAMIC WATER HYDROSTATIC BEARINGS
Principal Investigator:	Corbett, Professor J
Other Investigators:	Stephenson, Professor D
Researcher Co-Investigators:
Project Partners:	Airbus Operations Limited C P E Ltd CP DIV Landis Lund Pall Industrial Hydraulics
Department:	Sch of Industrial and Manufacturing Scie
Organisation:	Cranfield University
Scheme:	Standard Research (Pre-FEC)
Starts:	01 April 1997	Ends:	30 September 1998	Value (£):	97,634
EPSRC Research Topic Classifications:	Eng. Dynamics & Tribology
EPSRC Industrial Sector Classifications:	Manufacturing
Related Grants:
Panel History:
Summary on Grant Application Form
Recent technological advances, particularly in the field of ultra precision and high speed machining, have put substantial demands on the accuracy and performance of spindle and guideway bearing systems. Hydrostatic bearings are being used increasingly in such applications as they offer advantages of a) high stiffness, b) low friction, c) low wear, d) high damping and e) high precision positioning capability.The proposed work will build upon a current two year EPSRC programme in which hot isostatic pressing (HIPing) is being used to manufacture high quality, uniform, porous hydrostatic bearing structures. Alternative approaches will be investigated to produce the journal bearings. For example, the choice of ceramic is governed by both mehanical and physical properties, and ideally the material should provide the highest possible strength, stiffness, dimensional stability and ease of processing to ensure optimised pore morphology. Various engineering ceramics will be considered to gain further improvements in bearing performance. A test rig will be built which incorporates a hydrostatic spindle and drive unit, which can be driven at speeds of up to 16,000 r.p.m. (e.g. twice that of the existing programme). This will enable the dynamic performance to be assessed at high speeds in order to optimise the bearing parameters with regard to high precision and/or higher speed machining.
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Organisation Website:	http://www.cranfield.ac.uk