Industrial Purpose Valve Guide is grounded to a surface finish of 0.80 micro Ra on its outer diameter and with in a tolerance of 13 Microns. The Valve Guide is provided with thread and spiral in its inner diameter to retain oil for long time. The Valve Guide has microstructure of pearlitic matrix with 5% maximum free ferrite and 5% maximum free carbides. Industrial Purpose Valve Guide is provided with 10% maximum steadite in cellular or discontinuous form and has Hardness of 210-260 BHN.
