High quality excavator bucket bushing OEM 2417381 for CAT 320

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Company Product Introduction

Our company focuses on the field of engineering machinery accessories, and its main products are pins and bushings for loaders and excavators. With professional production capacity and flexible customization mode, we provide customers with high-quality products and services.

I. Product Overview

Pin: As a key component for connecting various parts of loaders and excavators, our pins are made of high-quality steel, carefully forged and precision-processed to ensure accurate size and excellent strength. Its surface has been specially treated to have excellent wear resistance and corrosion resistance, and can maintain stable performance under various harsh working conditions, ensuring the close connection and efficient operation of various parts of the equipment.

Bushing: High-quality materials are also selected, and it is designed according to the working characteristics of different parts of loaders and excavators. The internal structure and surface treatment of the bushing are optimized to effectively reduce the friction coefficient, reduce wear and extend the service life. Whether it is in parts that are subjected to high pressure or joints that require frequent movements, it can provide reliable support and cushioning for the equipment.

II. Production mode

OEM production: We have strong OEM production capabilities and can carry out large-scale production in strict accordance with the brand logo, technical specifications and quality standards provided by customers. The company has advanced production equipment and a complete quality control system. From raw material procurement to finished product delivery, every link follows strict production processes and testing standards to ensure that every product provided to customers meets the high quality requirements of their brands.

Production according to drawings: If customers have unique design requirements, they only need to provide detailed drawings, and our professional technical team can quickly interpret and convert them into actual production plans. Through advanced processing technology and high-precision production equipment, every detail on the drawings is accurately reproduced to ensure that the product's dimensional accuracy, form and position tolerances, etc. fully meet the requirements of the drawings and meet customers' special needs for customized products.

Sample customization: For customers who only have samples but no drawings, we provide sample customization services. Professional technicians will conduct a comprehensive analysis of the samples, including material composition, structural characteristics, dimensional accuracy, etc., and use advanced testing equipment and rich industry experience to reverse restore the design parameters of the products. Subsequently, the production process is formulated based on the analysis results, and sample trial production and optimization are carried out until products that are completely consistent with the original samples or exceed the quality of the original samples are produced, solving the problem of customization without drawings for customers.

Our company is always customer-oriented. With professional technology, advanced equipment and strict quality control, we are committed to providing high-quality loader and excavator pins and bushings, as well as a full range of customized solutions to customers around the world. Whether it is a large-scale construction machinery manufacturer, a maintenance service company or an individual user, we can meet your needs and become your trusted partner.

    Excavator bushing    

    Excavator pin    

    Loader bushing    

    Loader pin    

    Construction machinery pins and bushings    

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>> Product Raw Material

Medium carbon alloy steel

Typical steel: 

such as 42CrMo (corresponding to European standard 42CrMo4, American standard 4140).

Features: High strength and good toughness.

Application advantages: For the front bushing of the middle arm cylinder of Carter 320 excavator, this material can effectively resist the pressure and friction generated by the middle arm cylinder during the extension and retraction process, reduce wear and extend the service life of the bushing. Its good toughness can prevent brittle fracture when impacted and ensure the stable operation of the cylinder.

Alloy carburizing steel

Typical steel: 20CrMnTi.

Features: Low carbon content ensures good toughness and weldability of the material, chromium and manganese elements improve hardenability, and titanium elements refine grains and improve strength and toughness. After carburizing treatment, a high-hardness carburized layer is formed on the surface, and the core still maintains sufficient toughness.

Application advantages: In the application of the front bushing of the middle arm cylinder, the high-hardness surface after carburizing can greatly improve the wear resistance and adapt to the friction caused by the frequent extension and retraction of the cylinder. The toughness of the core makes the bushing less likely to be damaged when dealing with sudden impacts, ensuring the stable operation of the mid-arm cylinder under complex working conditions.

Lubricating coating material

Typical material: molybdenum disulfide (MoS₂) coating.

Features: Molybdenum disulfide has an extremely low friction coefficient and good thermal and chemical stability. It can form a firm lubricating film on the surface of the bushing, effectively reducing friction resistance and wear. In addition, the molybdenum disulfide coating also has a certain load-bearing capacity and can maintain lubrication performance under high load conditions.

High quality excavator bucket bushing OEM 2417381 for CAT 320

Raw material preparation

Material inspection: 

According to the design requirements, purchase standard steel, such as 42CrMo, 20CrMnTi, etc., as well as copper alloys and other materials that may be used. Each batch of raw materials is strictly inspected to check whether the specifications, dimensions, and hardness of the materials meet the requirements. At the same time, chemical composition analysis is performed to ensure that the material composition is consistent with the standards and to ensure product quality from the source.

Cutting:

According to the size and weight requirements of the bushing, use cutting equipment such as sawing machines, flame cutting machines, etc. to cut the raw materials into suitable blanks. The blanking size should take into account the subsequent processing allowance, which is generally 5-10mm on one side, depending on the specific processing technology and precision requirements.

Forging

Heating the blank:

Heat the cut blank to a suitable forging temperature range. For medium carbon alloy steel and alloy carburizing steel, the forging temperature is generally 1050-1200°C.

Machining

Rough machining:

Rough machining of forged blanks, including turning the outer circle, inner hole, end face, etc., removes most of the excess, and leaves a machining allowance of 0.5-1mm for subsequent finishing. Rough machining can improve production efficiency and provide a good foundation for finishing.

Fine machining: 

Use high-precision lathes, grinders and other equipment to finish the bushing to ensure the dimensional accuracy and surface roughness of the bushing. The dimensional tolerance of the inner hole and outer circle can be controlled within ±0.01mm, and the surface roughness reaches Ra0.8-Ra1.6μm.

Drilling and milling: 

According to the design requirements of the bushing, drilling and milling are performed using drilling machines and milling machines for installing locating pins, sealing rings and other parts. The position accuracy of the hole is controlled within ±0.05mm, and the dimensional accuracy of the groove is controlled within ±0.02mm.

Heat treatment

Quenching:

For bushings that need to improve hardness and strength, such as bushings made of 42CrMo, quenching treatment is performed. Heat the bushing to 850-880°C, keep it warm for a certain period of time, and then quickly put it into a quenching medium (such as oil or water) to cool it down so that the material obtains a martensitic structure and improves hardness and strength.

Tempering:

There is a large internal stress inside the bushing after quenching, and tempering treatment is required. The tempering temperature is generally between 550-650°C, and the specific temperature is determined according to the material and performance requirements. Tempering can eliminate internal stress, stabilize the structure, improve the toughness of the material, and improve the comprehensive mechanical properties.

Carburizing treatment: 

For bushings made of low-carbon alloy carburizing steel such as 20CrMnTi, carburizing treatment is usually required. Put the bushing into the carburizing furnace, and at a high temperature of 900-950°C, the active carbon atoms penetrate into the surface of the bushing to form a carburized layer of a certain thickness. The thickness of the carburized layer is generally 0.8-1.5mm.

Surface treatment

Lubricating coating treatment: 

Apply lubricating coatings such as molybdenum disulfide on the surface of the bushing by spraying or dipping. When spraying, the spraying pressure, temperature and coating thickness should be controlled. The general coating thickness is 0.02-0.05mm.

Dimensional accuracy detection:

Use measuring tools such as calipers, micrometers, three-coordinate measuring machines, etc. to detect various dimensions of the bushing, including inner diameter, outer diameter, length, groove width, aperture, etc., to ensure that the dimensional deviation is within the design requirements.

Surface quality inspection: 

Check whether there are cracks, sand holes, pores and other defects on the surface of the bushing by naked eye observation, optical microscope, roughness measuring instrument, etc., measure the surface roughness, and ensure that the surface quality meets the standards.

Hardness test: 

Use a hardness tester to test the hardness of different parts of the bushing to check whether the hardness meets the requirements after heat treatment and whether the structure and performance of the material meet the use conditions.

Assembly test: 

Assemble the bushing with related parts such as the pin shaft to check whether the fitting clearance is appropriate and whether the movement is smooth to ensure the performance of the bushing in actual use.

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.