ISSN: 2319-8753 International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Vol. 3, Issue 7, July 2014 Copyright to IJIRSET www.ijirset.com 14578 Influence of Resin Content and Cast Iron Powder Addition on Vibration Characteristics of Granite Epoxy Composites SubrahmanyaSwamy S. 1 , B. R. Sreedhar 2 , Vinayak J. Kalas 3 , Chandan K. M 3 , Sandeep S. H 4 Professor and Head, Department of Mechanical Engineering, Bapuji Institute of Engineering and Technology, Davangere, India 1 Associate Professor, Department of Mechanical Engineering, G. M. Institute of Technology, Davangere, India 2 Undergraduate Student, Department of Mechanical Engineering, Bapuji Institute of Engineering and Technology, Davangere, India 3 Postgraduate Student, Department of Mechanical Engineering, Bapuji Institute of Engineering and Technology, Davangere, India 4 ABSTRACT: With the advent of high speed machining, to improve productivity, the dynamic performance of machine structures especially in precision machining becomes critical. Granite epoxy composite is a novel material being developed as an alternate material for precision machine tool beds. This composite consists of well-graded granite particles and Araldite resin with a suitable hardener for curing the mix at room temperature. Several distinct advantages like excellent damping properties, long term dimensional stability, less curing time leading to shortest lead time for manufacture, long term dimensional stability and lower production costs compared to conventional Cast iron beds can be derived from this composite. Objective of this study was to investigate experimentally effect of resin content on vibrational characteristics of granite epoxy composite. KEYWORDS: Granite epoxy composite, Dimensional stability, Precision machining, Vibration damping I. INTRODUCTION The precision of Machine Tools and Coordinate Measuring Machines, used in metal-mechanical industry, is directly related with the materials used in their construction. One of the main elements of these equipments is its base or structure over which all other building components are supported. The materials specified for its manufacture must have high values of elastic modulus, yield strength, wear resistance and toughness due to the machine intense mechanical demands. Added to these properties, it is also desirable that these materials present reduced thermal expansion coefficient and higher damping capacity to perform their tasks with the required precision. The materials currently used that meet these properties demand are cast iron and granite. However, cast iron presents high thermal expansion and conductivity, which allow errors in the manufacturing, due to dimensional changes caused by thermal expansion and contraction and structure distortions induced by the variations in the room temperature. The granite, a natural low cost ceramic, has low tenacity but is not easy to process due to its high hardness, porosity and internal cracks, making difficult the fabrication of complex geometry components. An additional choice mentioned in the literature is the use of concrete structures, but the reduced dimensional stability associated to water absorption makes its use unfeasible. The high speed operation of a machine tool is important for productivity improvement. Although the cutting speed has been increased due to newly developed cutting tool materials such as ceramic, CBN, diamond and as on, productivity is still restricted by the low transfer speed of massive moving bodies which are usually made of steel and cast iron. One of