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Innovation & Specialty Treatments

The strive for excellence drives the need to continuously innovate the space

SnakeSkin Superfinish. 

Our world-class engineering & innovation team keeps our innovation pulse beating.
SINUS is the proud owner of the revolutionary Snake Skin Super finish – a highly innovative yet cost-effective surface treatment that reduces friction between the valve stem and guide. in a significant form.
The main value proposition of this innovative treatment is gaining enhanced performance that typically requires significant budgets.  


Proprietary PVD Coating
Our Physical Vapor Deposition (PVD) coating group, operated by our experienced staff, offers a wide range of proprietary coatings developed by SINUS.  

Our PVD group is responsible for a verity of performance solutions required by our customers. Through our range of coatings, SINUS is able to address and resolve customer challenges relating to engine valves performance and endurance an durability under extreme conditions. 

Innovation in Production Scale

Capacity, durability, flexibility, professionalism, over 65 years of collected knowledge and experience, high capabilities, strict quality standards, manufacturing and engineering collaboration with SINUS’s fellow subsidiaries as part of the Lachman-Group, a strong financial backbone, strong management and most important, a highly skilled staff of employees, titles SINUS as your ultimate source for superior quality internal combustion engine valves.

Sinus can provide all type of forgings  in Aluminum, Titanium, Metal and more.

Our Forging capabilities include:

up to 400 tons press machines in various technologies such as Closed Die Forging and Open Die Forging.

Mechanical Press – converts the rotation of the motor into linear motion of the ram.

Friction welding is solid-state joining technique that welds workpieces by generating heat through mechanical friction. In reality an apparently smooth surface consists of many microscopic projections, called asperities. When one surface moves relative to another these asperities interact,  the force resisting motion between two or more interacting surfaces. Interaction of these asperities through elastic and plastic yielding generates heat. Friction welding utilises this phenomenon for joining applications. The induced mechanical motion of friction welding generates heat, causing the materials to be joined to soften and become viscous. While in the softened state, the mechanical motion of the process mixes the materials to create a bond. 

Sinus  serves our clients with high quality precise machining capabilities in Milling Turning, Turn-mill Centers and full automatic lines of  Mill Centers, together with high standards QA with CMM Machines and special heat treatment and plating facilities in house.


The valves in an engine have several functions. First, they must allow the intake of fuel and air. Then they must seal the engine. As engine combustion takes place, the exhaust valve must also allow the burned gases to leave the combustion chamber.

A valve grind (commonly referred to as a valve job or valve lap) can be crucial for proper functioning valves/seals. It is the process of smoothing out the engine valves so that they are effectively able to seal in the valve seat in the cylinder head to completely seal the engine’s combustion chamber.

PVD stands for Physical Vapor Deposition. PVD Coating refers to a variety of thin film deposition techniques where a solid material is vaporized in a vacuum environment and deposited on substrates as a pure material or alloy composition coating.

As the process transfers the coating material as a single atom or on the molecular level, it can provide extremely pure and high performance coatings. PVD Coatings provide crucial performance attributes for the final product. Whether the coating needs to be extremely thin, pure, durable or clean,

The matter of ensuring that valve-stem lubrication is sufficient has two main benefits. First, any friction between stem and guide creates energy that is necessarily subtracted from crankshaft output power and converted to heat. Minimising this is clearly a desirable aim. Second, if the lubrication is sufficient, we minimise the rate of wear of the valve guide and valve.
There are a number of surface treatments that aim to reduce friction and make the stem less susceptible to wear, and these have typically included heat-treatment processes such as nitrocarburising of steel valves... 
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Induction Hardening

Surface hardening in which a metal part is induction-heated and then quenched. The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part. Induction hardening is used to selectively harden areas of a part or assembly without affecting the properties of the part as a whole

Stellite Welding

Stellite is a range of cobalt-chromium alloys designed for wear resistance. The alloys may also contain tungsten or molybdenum and a small but important amount of carbon.

Heat Treatment

A group of industrial, thermal and metalworking processes used to alter the physical, and sometimes chemical, properties of a material. The most common application is metallurgical. Heat treatments are also used in the manufacture of many other materials, such as glass. Heat treatment involves the use of heating or chilling, normally to extreme temperatures, to achieve the desired result such as hardening or softening of a material.


Find out if we have the vaulve that you are looking for

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