OEM 4443884 High quality excavator bucket cylinder bushing suitable for Hitachi 330

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Alloy steel:

40Cr: has good comprehensive mechanical properties, and has excellent strength, toughness and wear resistance. After a suitable heat treatment process, the hardness and strength of the bushing can be improved, so that it is not easy to deform and wear when it is subjected to the pressure and friction of the bucket cylinder. It is suitable for the bushing of the bucket cylinder of the excavator with high performance requirements.

GCr15: It belongs to rolling bearing steel, with high hardness, uniform structure, good wear resistance and contact fatigue performance. When used for the bushing of the bucket cylinder, it can ensure that the bushing maintains stable dimensional accuracy and surface quality during long-term use, reduce wear between the pin shaft, and improve the reliability of the entire cylinder system

OEM 4443884 High quality excavator bucket cylinder bushing suitable for Hitachi 330

Raw material preparation

Inspection of materials: Purchase appropriate raw materials according to product design requirements.

Cutting: According to the size specifications of the bushing, use cutting equipment (such as sawing machine, laser cutting machine, etc.) to cut the raw materials into suitable blanks. The size of the blanks should take into account the subsequent processing allowance.

Machining

Rough machining: Clamp the forged or cast blank on a lathe, milling machine or other machine tools for rough machining, remove most of the allowance, and process the basic shapes of the inner and outer cylindrical surfaces, end faces, etc. of the bushing, leaving a machining allowance of about 0.5-1mm for subsequent finishing.

Finishing: The bushing after rough machining is semi-finished and finished to ensure dimensional accuracy and surface quality. The inner and outer cylindrical surfaces are ground with a grinder, and the dimensional accuracy can be controlled at 0.01mm or even higher; the inner hole of the bushing is bored with a boring machine to ensure the cylindricity and straightness of the inner hole; for bushings with special requirements, honing may also be required to further improve the finish and accuracy of the inner hole surface.

Drilling and tapping: According to the design requirements of the bushing, use a drilling machine to process mounting holes, oil holes, etc. on the bushing, and perform tapping operations for installation and lubrication.

Heat treatment

Quenching: For alloy steel bushings, quenching treatment is usually required to improve hardness and strength. The machined bushing is heated to above the critical temperature, kept warm for a certain period of time, and then quickly cooled to change the organizational structure of the material to obtain high-strength organizations such as martensite.

Tempering: There is a large internal stress inside the quenched bushing, which is easy to cause cracking and deformation, and tempering treatment is required. Heat the bushing to a temperature range below the critical temperature, keep warm for a period of time, and then cool it to eliminate internal stress, stabilize the organization and size, and improve the toughness of the material.

Surface treatment: In order to improve the wear resistance, corrosion resistance and self-lubricating properties of the bushing, the surface of the bushing needs to be treated. Common surface treatment methods include hard chrome plating, copper plating, phosphating, blackening, etc. For example, hard chrome plating can form a chromium layer with high hardness and good wear resistance on the surface of the bushing, effectively improving the service life of the bushing.

FAQs

Q1: What is the typical application for the High Quality Excavator Bucket Cylinder Upper Pin Shaft?

A1: This pin shaft is specifically designed for excavator bucket cylinders, suitable for high-demand tasks in construction, mining, and heavy machinery operations.

Q2: Can you customize the pin shaft for other machine models?

A2: Yes, we offer full customization services for pin shafts based on your specifications, ensuring compatibility with a wide range of machinery models.

Q3: How do you ensure the durability of your excavator pin shafts?

A3: We use advanced heat treatment processes and high-quality materials to enhance the hardness and wear resistance of the pin shafts, ensuring long-lasting performance.

Q4: What materials are used for manufacturing the pin shaft?

A4: Our pin shafts are made from premium alloys such as 45C, 42CrMo4, and 41Cr4, selected for their durability and ability to withstand heavy-duty use.

Q5: Do you provide after-sales support for your excavator pin shafts?

A5: Yes, we provide comprehensive after-sales support, including product guidance, warranty services, and troubleshooting assistance to ensure continued operation.

Q6: How do I place a custom order for the pin shaft?

A6: Simply provide us with your design drawings or specifications, and we’ll create a customized pin shaft tailored to your exact requirements.

Q7: Can you ship to international locations?

A7: Yes, we can deliver our high-quality excavator pin shafts worldwide, offering efficient shipping and timely delivery to your location.

Q8: Are your pin shafts compatible with other excavator brands?

A8: Our pin shafts are designed for a wide range of excavators, including those from Sany Heavy Industry, but we can also customize them for other brands as needed.