PRODUCTS

COATED PISTON

YENMAK pistons have serial graphite or spray graphite coatings on the piston surface. These reduce friction inside the engine and provide good emergency operation properties. These coatings are used for acoustic reasons. Thanks to their use, the piston rolling sound is minimized. And in addition, phosphate is used in tin coatings to increase wear resistance and service life.

SERIGRAPHITE COATING

Extensive research has identified the correct part geometry and the feed rate (pitch) that provides the oil retention surface along with its ability to get used to speed. However, subsequent advances in piston design to meet the demands for friction, noise, and reduction in the reciprocating mass have resulted in a shorter piston skirt length that

SPRAYING GRAPHITE COATING

While the graphite is coated outside of the piston, the piston is covered with graphite by spraying method. It is used to reduce the sound of the piston, such as serial graphite coating, to protect the outer surface against wear and to minimize liquid retention on the piston face.

TIN (SODIUM STENATE) COATING

As a soft, deformable material, tin is also suitable as a skirt coating and acts as a lapping aid and retains its boundary lubrication properties, especially for cold starts. The tin coating is 1 to 2 Mμ thick. It is slightly less than that of a graphite layer due to its potential to prevent stiffness. Tin-plated pistons are matched with gray

PHOSPHATE COATING

By phosphating, an insulating protective layer consisting of phosphate crystals is also provided on the steel surfaces. Although its protection against corrosion is short, it is used in places where lubrication is required and as a pretreatment before painting.Mangan PhosphateManganese phosphate acts as a layer on the metal surface. Due to its abil

HARD ANODIZED COATING ON RING GROOVE

While the peak and 2nd ring groove on a diesel engine piston and have traditionally been well protected against wear by a ring retainer, this protection is not required in gasoline engines. However, recently, damage such as deformation and material wear has occurred in the piston peak ring groove of the gasoline engines with high power and torque.

ANODE COATING ON THE TOP

While the first piston ring channel or compression ring channel in a diesel engine piston has traditionally been well protected against wear by a ring retainer, subsequent tests have shown that this is not sufficient against piston combustion events. Because of the strong compression ratios in diesel engines, there have been started to be seen in t

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PRODUCTS

PRODUCTS

CYLINDER LINER

PISTON AND PISTON PIN

PISTON RING

FILTER

ENGINE BEARING AND BUSHING

ENGINE VALVE

O-RING

KIT-SET

TECHNICAL DOCUMENTS

COATED PISTON

SERIGRAPHITE COATING

SPRAYING GRAPHITE COATING

TIN (SODIUM STENATE) COATING

PHOSPHATE COATING

HARD ANODIZED COATING ON RING GROOVE

ANODE COATING ON THE TOP