UNIQUE ENGINEERS Santacruz East, Mumbai, Maharashtra

WET CYLINDER LINERS made of grey cast-iron, 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 metals 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 castings are of much finer grain structural and free from blow holes or porosity and the hardness is very good. 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. The liners are ‘cast-in fit’, force (press) fit or slip fit. The interference between its outer diameter and bore-hole walls depends on fit-type from 0.050 to 0.075 mm. these are available in Fully-Finish (FF) condition and the available in wide range suitable for medium and heavy duty application.

A very critical component, it must be checked for smooth operation of fan, shafts, pulleys and belts. Appropriate material will ensure smooth running under high temperature caused by centrifugal forces. Avoid tap on the shaft as it may result in damage to the ball. The fan should seat squarely with the Pump Shaft. Improper fan and pulley cause damage. The fan belt tension must be appropriate. They are pinion and pulley types, works in parallel with engines.It should have free movement / smooth operation of fan, shafts, pulleys and belts.

VALVE TAPPETS are made from “Chilled Cast Iron” in shell mounding, which provides hardness of 58-60 towards the wear face of high speed engines, and above hardness 75-78 towards the wear face of tappets for high temperature and speed engines. 

VALVE SEAT INSERTS are made from high chrome alloy and produced by centrifugal cast process to obtain closed grain dense structure to meet their functional properties. Seats fitted on the head to protect leakage steam during operation.

Valve Guides are made from Grey Cast Iron and CuZnAl-alloy material GREY CAST IRON of perlitic structure with high phosphorous content. The perlitic structure and the reticular phosphide distribution along with the good graphite formation give high wear resistance / friction less operation to the valve and improved running properties in poor lubrication condition.The available ranges are suitable for light, medium and heavy duty applications. CuZnAl-alloy Guides are with excellent wear resistance and low coefficient of friction. Used for highest stressed guides.  The available ranges are suitable for light duty applications. 

SINGLE METAL BUSHES are normally made of PHOSPHORUS BRONZE, BRONZE, COPPER etc on to which the principal bearing material is cast. These are used to minimize the friction between two moving parts. A bearing surface has to be strong to withstand high oil filling pressures.  It needs to be hard to minimize wear and prevent failure from fatigue.

PISTONS are madeof aluminum alloy through casting process. The ability of the cast material is having high strength, strength for high hot resistance for surface abrasion, better thermal conductivity and low thermal expansion.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.The pistons consist of bare compressor ring groove or insert of spheroidal-graphite (SG) alphin for long lasting.

PISTON RINGS are made from pig iron which is known as high quality cast iron with composition of carbon, chromium, nickel, and molybdenum. These are individually cast and close material control ensures high tensile strength, resistance to wear and scuffing and to collapse at operating temperatures. Piston rings are compressor ring, control (scraper) ring and oil rings.Each Ring is double turned and ground to maximum accuracy for smoother performance and low fuel consumption.

Nuts and Bolts are available in specified and appropriate material for various applications such as Wheel Bolts, Connecting Rods Bolts & Nuts of various types and many other application of the vehicles. These products are very wide range and can be made as per specifications and drawings.

Size : 0-10mm, 10-20mm, 20-30mm, 30-40mm, 40-50mm

Type : Nut Bolts

Material : Alloy Steel, Brass, Copper, Mild Steel, Steel

Shape : Round

Color : Black, Silver, Yellow

Country of Origin : India

Finish : Non Polished, Polished

Brand Name : UNIQUE

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.   

GASKETSare available in asbestos and non-asbestos material. They are available for various applications that covers such as air brake compressor, automotive, heavy-duty engines, agriculture tractors etc. These can also be made as per customer specifications.

DRY CYLINDER LINERS / SLEEVES made of grey cast-iron, 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 metals 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 castings are of much finer grain structural and free from blow holes or porosity and the hardness is very good. It has enough hardness, toughness strength and wears resistance. The allowance for the fitment between liner and bore holes is 0.050 to 0.075mm. these are available in Semi-Finish (SF) and Fully-Finish (FF) condition. The available ranges are suitable for light, medium and heavy duty applications. 

CYLINDER LINERS / BLOCK (AIR COOLED AND WATER COOLED) CYLINDER LINERS / BLOCK (AIR COOLED AND WATER COOLED)cylinder barrels made from grey cast-iron by the special “Shell Moulding Process" cause wear resisting close grained iron casting and this ensures long life and efficient cooling. These are available in Fully-Finish (FF) condition and suitable for self Air cooled or water cooled. The available ranges are suitable for light, medium and heavy duty applications.

CYLINDER HEADS are made from grey cast iron through casting process. There are various types of the heads which suitable for wet sleeve engine, non sleeve etc. Heads are available in fully machined / ready to use fitted with valve guide and valve seats and proof of machining. 

CRANKHAFT are manufacture through forged in Alloy Steel to appropriate strength for various applications. Spheroid Graphite (SG) Iron is also being used for smaller Cranks (light applications). The crankshafts are Normalized and Induction Case Hardened. This is basically the heart of the engine.

CONNECTING RODS are made of open / closed die from hot steel forging process for heavy duty application, but malleable or spheroid-graphite (SG) iron casting or sinter forgings are beginning to be used for smaller engines. Small-end fitted with shell bushing or plain for light application and Big-end are normally either serrated or grooved and tongue joints which is having bolts either sides, a pair of split bearing is used inside Big-end housing bore. 

CAMSHAFTS are manufacture through forged and casting process with case hardened AND performs a critical function, and has a great impact on an engine’s performance at different speeds.The material used at lobes (cams) must be appropriate to ensure optimum performance.

BEARIGS AND BUSHES are normally made of strips having Bi-metal (steel backed copper / lead) low carbon-steel cylindrical backup strip on to which the principal bearing material is cast or roll-bonded. This combination is known as bi-metal bearing. These are used to minimize the friction between two moving parts. A bearing surface has to be strong to withstand high oil filling pressures.  It needs to be hard to minimize wear and prevent failure from fatigue.

AIR BREAK COMPRESSOR PARTS are available for various compressors viz. MERCEDES, MAN, MIDLAND, CLAYTON, BENDIX etc. suitable for such engines as CUMMINS MACK, INTERNATIONAL, MERCEDES and other Heavy Duty Vehicles.All the parts – Sleeves, Pistons, Piston Rings, Connecting Rods, Bushings, Bearing etc. are made by using best technology and quality process. We are able to make any range for compressor parts.The Pistons are made of Cast-Iron as well as of Aluminum depending on the application

Complete solutions of engine spare parts, like liner, pistons, piston rings, bushings, connecting rods etc.