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21K-70-12161 Source factory excavator bushing heavy machinery bushing suitable for KOMATSU PC200/PC220

  • OEM replacement : 21K-70-12161  21K7012161
  • Material : 45#/40Cr/42CrMo
  • Applicable models :PC200/PC220
Availability:
Quantity:
  • 21K-70-12161

>> Product Name

Excavator bucket bushing.


>> Product Use

Reduce friction and wear: 

When the excavator is working, there are frequent relative movements between the various components, such as the rotation and sliding of the pin and the connection parts. The bushing is installed between these components, which can convert the direct friction between the components into friction between the bushing and the components. Since the bushing is usually made of wear-resistant materials, such as copper alloy, it can effectively reduce the friction coefficient and reduce the wear degree of the components, thereby extending the service life of the excavator-related components and even the entire machine, and reducing the maintenance cost and frequency.

Buffer vibration and impact:

The excavator will face various complex working conditions during operation, and vibration and impact will inevitably occur. The bushing has a certain elasticity and flexibility, which can absorb and buffer these vibration and impact energies, reduce their impact on the components, protect adjacent components from damage, avoid problems such as loose components and fatigue cracks caused by long-term vibration and impact, and improve the stability and reliability of the equipment.

Protect key components:

As a relatively easy-to-replace component, the bushing bears most of the friction, impact and other forces during the operation of the equipment, and plays a role in protecting more important and more expensive key components (such as pins, joints, etc.). When the bushing is worn or damaged, only the bushing needs to be replaced without replacing the entire key component, which greatly reduces the maintenance cost and difficulty.


Certificate


>> The Company's Main Product Display

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.

1. Main products

(I) Engineering machinery pins

Widely used in various types of engineering machinery, such as excavators, loaders, bulldozers, cranes, etc., connecting various key components of the equipment, such as booms, dipper arms, buckets, lifting arms, etc., to ensure accurate transmission and stable connection between components.

(II) Engineering machinery bushings

As a key component of connecting parts in engineering machinery, bushings are widely used in various articulated parts, such as the connection between the bucket and dipper arm of the excavator, the connection between the boom and the frame of the loader, etc., to play the role of support, positioning, friction reduction and buffering, protect the key components of the equipment, and improve the overall performance and reliability of the equipment.

2. Customized services

(I) OEM production

We have rich OEM production experience and can provide customers with one-stop OEM services according to the brand needs and quality standards of customers. From product design, mold development, production and manufacturing to quality inspection, packaging and transportation, we strictly operate in accordance with customer requirements and international standards to ensure that we provide customers with high-quality, cost-effective products and help customers build a competitive brand image.

(ii) Production according to drawings

If the customer already has detailed product drawings, our professional technical team can quickly interpret the drawing requirements and develop precise production processes and quality control plans based on the drawings. We use advanced CNC processing equipment and high-precision testing instruments to strictly produce according to the drawing dimensions and technical requirements to ensure that the various indicators of the product are completely consistent with the drawings and meet the customer's personalized customization needs.

(iii) Sample customization

For customers who only have samples but no drawings, we provide professional sample customization services. First, our technicians will conduct a comprehensive analysis and inspection of the samples, including material composition, dimensional accuracy, surface quality, mechanical properties, etc. Then, using advanced reverse engineering technology, the samples are converted into accurate three-dimensional models and production drawings. During the production process, we strictly manufacture in accordance with the quality standards of the samples, and through multiple sample trials and optimizations, we ensure that the final product is completely consistent with the original sample in appearance, size, performance, etc., and even exceeds the quality level of the original sample.

    Excavator bushing    


1
2
3
4


    Excavator pin    


2
1
4
3


    Loader bushing    


44
33
22
11


    Loader pin    


1
2
3
4


    Construction machinery pins and bushings    


1
2
3
4


>> Partial Applicable Vehicle Model Display


CAT CAT301.7 CR CAT313 GC CAT323 GX CAT333
CAT301.4 CR CAT312 GC CAT323 CAT374
CAT302 CR CAT326 GC CAT316 GC CAT395
CAT303 CR CAT326 CAT 318D2L CAT352
CAT305.5 CAT320 GX CAT330 CAT355
CAT306.5 CAT320 GC CAT336 CAT330 GC
CAT307.5 CAT320 CAT350
CAT307 CAT323 GC CAT340
KOMATSU PC100-3/5/6 PC200-2/3/5/6/7/8 PC270-6/7/8 PC360-7
PC120-2/3/5/6 PC220-2/3/5/6/7/8 PC290-10/11 PC360LC-10/11
PC130-6/8/11 PC228-1/2/3/8/10/11 PC300LC-1/2/3/5/6/7/8 PC390LC-10/11
PC150-1/3/5/6 PC240-6/8/10/11 PC350-8
PC160-6/7/8 PC250-6 PC350LC-6/8/10/11
SANY SY135C SY75C SY245H-S SY415H-S
SY200C-S SY335BH-S SY95C SY375IDS
SY205C-S SY275H SY485H-S SY550H
SY215E SY235H-S SY485GLC-S
SY215C-S SY155H SY305H-S
KOBELCO SK210LC-10 SK200-10 SK60-8 SK140LC-8
SK130-11 SK250-10 SK380XD-10 SK460-8
SK75-11 SK260LC-10 SK220XD-10
SK350LC-10 SK330-10 SK150LC-11
Hitachi ZX130-6A ZX260K-6A ZX210LC-5A ZX490LCH-5A
ZX240-5A ZX260LCH-5A ZX350-6A Pro ZX220K-6A
ZX250-6A ZX200C-6A ZX360K-5A ZX520LCH-6A
ZX250K-5A ZH200-5A ZX300-6A ZX350-6A
ZX250LC-5A ZX210-6A

ZX300-5A

ZX500LCH-5A
ZX260LC-6A ZX210K-5A ZX370K-6A ZX220LC-6A
ZX195-5A ZX360H-5A ZX370H-6A



>> Product Raw Material

Alloy steel:

such as 40Cr, 42CrMo, etc. This type of material has high strength, hardness and toughness. After proper heat treatment, it can obtain good comprehensive performance and can withstand large loads and impact forces. It is suitable for excavator bushings with harsh working conditions.

Pin shaft raw materials


Bushing raw materials



21K-70-12161 Source factory excavator bushing heavy machinery bushing suitable for KOMATSU PC200/PC220

Metal bushing production process

Raw material preparation: According to the product design requirements, purchase suitable metal materials, such as copper ingots, alloy steel billets, etc., and conduct inspections to ensure that the composition and performance of the materials meet the standards.

Casting or forging: Using the casting process, the molten metal liquid is poured into the pre-made mold, and the bushing blank is formed after cooling and solidification; for some bushings with higher requirements, the forging process can also be used to repeatedly forge the metal billet to improve the internal structure of the material and improve the strength and toughness of the bushing.

Heat treatment: Heat treatment is performed on the bushing blank after casting or forging, such as quenching, tempering, normalizing, etc., to eliminate internal stress, improve the organizational structure of the material, and improve the hardness, strength and wear resistance of the bushing.

Machining: Use lathes, milling machines, drilling machines, grinders and other processing equipment to perform precision machining on the heat-treated bushing blank, and process the inner and outer diameters, lengths, oil grooves, oil holes and other dimensions and structures of the bushing to ensure the accuracy and surface quality of the bushing.

Surface treatment: In order to improve the corrosion resistance and wear resistance of the bushing, the machined bushing can be surface treated, such as electroplating, spraying, phosphating, etc.

Quality inspection: Use measuring tools (such as calipers, micrometers, etc.), hardness testers, flaw detection equipment, etc. to conduct a comprehensive inspection of the bushing's size, hardness, surface quality, internal defects, etc. to ensure that the product meets the design and use requirements.

Assembly and packaging: The bushings that have passed the inspection will be cleaned and oiled, and then packaged according to the specified packaging requirements for transportation and storage.


Manufacturing Process for High-Quality Excavator Pin Shaft



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.

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