Machinery Excavator Spare Parts Engine Piston 4d95-7p For Komatsu Motor

High Quality Machinery Parts Engine Piston 4D95-7P For Komatsu Motor

The piston profile evolved from the original multi-section regular cylinder to the present circular multi-section regular cone and gradual elliptic cone, and the skirt gradual barrel elliptic cone.

The skirt shape is generally barrel - oval. The axis of the barrel coincides with the axis of the piston. The piston section perpendicular to the axis is elliptic and the short axis is along the direction of the piston pin. Some piston skirt made of multi - stage continuous elliptic cone, multi - stage continuous special circle. The advantages of barrel skirt are uniform machine oil, tensile cylinder, anti - channeling oil, oil film bearing capacity, reduce friction work and friction loss.

However, determining the best profile is an extremely complicated process that requires repeated experiments and often takes a long time. The traditional method is to analyze the temperature field and stiffness of the piston, use the finite element method and draw a piston profile based on experience, then load the obtained test samples into the engine for piston wear test, and observe the wear marks on the piston and cylinder liner. After successive approximation, the best piston profile can be determined. But due to the movement of the piston, the thermal deformation caused by different kinds of relevant factors, the piston is likely to be composed of cylinder head bolt tightening torque, the uneven cooling and the cylinder wall temperature distribution of the influence of the deformation of the cylinder wall, as well as each cylinder combustion uneven, and the characteristics of piston itself (such as stiffness, the expansion of the automatic control piston thermal expansion rate varies with the piston section) is the determination of type surface increased the difficulty.

Product Description

Piston type & surface treatment

Alfin Reinforcement

Piston with alfin reinforcement are resistant to compression ring groove wear . the alfin reinforcement also act as a heat barrier minimizing heat conduction from piston skirt area. Such pistons can thus withstand the demand for higher load and highet performance engine .

Cooling Gallery

Created for operation in high temperature environment like turbo engines. Through oil circulation in the gallery, pistons are intensively cooled in the piston crown and ring belt area .

Anodized Crown

Anodization of piston crown creates a hard crown surface thus providing pistons with extra protection against crown piting and wear .

Tin Coating

Tin coated surface provides extra lubrication and smoother running of cylinder components resulting in longer engine lifetime .

Moly Skirt

Help produce less frictional heat and engine noise. The extra lubricative effect also minimize cylinder bore wear and prevent piston scuffing .

Phosphating

Reduce tge fructuib from with the cylinder liner . And to protect the piston from corrosion .

Nitriding

The nitriding products have excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance .

Our Advantages

1. Samples are welcome for production.

2. Enough types of stock

3. We have more than 10 years in construction machinery parts in Oversea market

4. Honesty and trustworthiness in business

5. Positive feedback from abroad and domestic market

6. Standard packing or according to your specification requests

7. Looking forward to deep cooperation with sincere partner and your satisfaction is our pleasure to maintain momentum going forward

FAQ

A: We can see from the pictures why the color of our products is darker than ordinary affiliates?

B: That ’s because our pistons are high-silicon and high-nickel, so the color will be darker.

A: What are the benefits of high silicon and high nickel?

B: We can refer to their performance, we can know that high silicon and high nickel products have better lubricity and higher quality, so their service life will be longer.

A: In addition to this advantage, does your product have any other highlights?

B: There are also more cooling pipes inside our pistons to facilitate better heat dissipation and make the product last longer.

A: After your explanation, I have all moved. The products of your OKJ look very good.

B: Well, you can try to use our products, you must believe in your own vision and believe in us.

A: I want to know how your after sales service

B: I forgot to tell you that our after-sales service is perfect, and we will have someone to deal with problems encountered by customers to ensure you have the best shopping experience.

Our Product Range

Guangzhou Shangshun Engineering Machinery Parts Co., LTD.

Guangzhou Shangshun Engineering Machinery Parts Co., LTD., 14 years specializing in engine spare parts, a total of four subsidiary below: Guangzhou machinery spare parts, Guangzhou baiyikang machinery spare parts, Guangzhou zhongcheng machinery sapre parts , Guangzhou hongying engine maintenance center. The main products are: cylinder liner, piston, piston ring, valve, pipe, seat, bearings, water tank, crankshaft, Chassis spring, etc. They are all made of the host form a complete set of materials,quality are among the best in the industry. Business throughout the country to overseas states. The annual turnover of the company is about RMB 78 million. Now it is the general agent of OKJ heavy industries engine parts in China.

Our mission: Make a living at it, be good at it; High-profile work, low-key life; Customer first, mission will reach!

Our concept: OKJ make maintenance no longer difficult!

Our Trophy And Culture