Usha Liner(shapar) Pvt. Ltd. Rajkot, Gujarat

Cylinder Liners (Dry & Wet) manufactured by the "Centrifugal Cast Process" is acknowledged to be the best method. It possesses the bearing metal qualities that cause skin healing after abrasion and a structure that is readily wetted by oil and retains an oil film. Corrosion resistance is further improved by adding Chromium in the metal. In the centrifugal casting process, the molten metal is poured into a metal mould or die which is revolving at a high speed. The centrifugal force causes the metal to distribute itself evenly around the die. The resulting casting are of much finer grain and free from blow holes or porosity. A further important advantage is that the impurities, being lighter than the iron, are forced centrifugally to the bore surface from which they are removed by machining. TYPE                : Dry, Wet & Air Cooled Blocks suitable for more than 1500 types of Series of various models & Make. DRY LINERS    : The Dry Liner is in direct contact with engine block. The Outer Diameter is to be very precise and perfect without contours. WET LINERS   : The Wet Liner is with sealing grooves for ‘O’ rings and always in direct contact with water. A Wet Liner is generally Heavy & Thick walled. RANGE             :   Diesel, Petrol, Marine & Compressor Engine for Light & Heavy commercial vehicles, Cars, Tractors & Utility Vehicles. CAPACITY       : 1. QUANTITY  : Centrifugal Castings : 300 Ton p.m. 2. MACHINING : 65000 Pcs. p.m.

Delight Valve Guides are grounded to a surface finish of 0.80 Micro Ra on its Outer Dia and with in a tolerance of 13 Microns. Delight Valve Guides are also provided with Thread and Spiral in its Inner Dia to retain oil for long time. Thus increases the life of both Valve Guide and the Valve. Delight Valve Guide has microstructure of Pearlitic matrix with 5% maximum free ferrite 5% maximum free carbides an d10% maximum steadite in cellular or discontinuous form and Valve Guide has Hardness of 210-260 BHN

PISTONS are manufactured in a new alloy of exceptional wear resistance and strength at working temperatures. The high conductivity of this material promotes cool running and the light but robust design ensures efficient operation over extended periods. Resistance to wear ring grooves, skirt, and gudgeon pin hole is greatly increased. To ensure dimensional stability in service, all alloy piston castings are correctly heat treated and aged.

PISTON RINGS are individually cast and close material control ensures high tensile strength, resistance to wear and scuffing and to collapse at operating temperatures. Each Ring is double turned and ground to maximum accuracy for smoother performance and low fuel consumption.

AIR COOLED CYLINDER BARRELS made from special "SHELL MOULDING PROCESS" causes wear resisting close grained iron casting and this ensures long life and efficient cooling.

Gudgeon Pins / Piston Pins for single cylinder engine applications are made from 15MnCr3 grade steel alloy. All automobile Gudgeon Pins are manufactured from 20MnCr5 grade steel alloy having hardness between 55 to 65 HRC. All Gudgeon pins are case hardened for high wear resistance surface, coupled with tough cores to resist shock loads and strength to give larger service life.