Hitachi EX400 Excavator Front Idler Assy 40-Ton Lug-Pattern

The EX400 Idler Assy is Kubota's compact powerhouse component designed for excavators in demanding Australian projects. This precision-engineered bottom roller ensures durability, excellent load-bearing capacity, and smooth operation in compact construction machinery.The ​​EX400 Idler Assy​​ (short for "idler assembly") is a vital wear part in the undercarriage of EX400-series excavators, playing a central role in maintaining track alignment, reducing friction between the track chain and rollers, and supporting the machine’s weight during operation. It works in conjunction with sprockets, rollers, and carrier rollers to ensure the track moves smoothly along its designated path—functions essential for stability, efficiency, and longevity in heavy-duty tasks like digging, pushing, and traversing rough terrain. Proper maintenance of the idler assembly is key to minimizing downtime and extending the lifespan of the undercarriage.

Our production involves rigorous quality-controlled processes:

• High-grade Material Selection: Components are crafted from premium materials for maximum durability
• Outer Race/Shell: High-carbon chromium bearing steel (SUJ2) for superior hardness and wear resistance
• Inner Roller/Spindle: Alloy steel (SCM440) engineered to withstand significant radial and axial loads
• Seals & Lubrication: Nitrile rubber (NBR) seals for oil resistance with lithium-based grease for long-term lubrication
• Quality Assurance: All materials undergo thorough inspection for chemical composition and mechanical properties using spectrometers and hardness testers

Founded in 2004,it has a history of 18yearsIt is located in Quanzhou,Fujian Province, a well -known overseas Chinese hometown in southern Fujian,adjacent to Quanzhou Jinjiang Airport.The transportation is very convenient.After the company's unremitting development and improvement of the market over the past few years,the company has now become a modern mechanical accessories manufacturer that integrates and trade.

The company specializes in the production of CCJT,JTRTR,UTR,KRT,LY,WX, WJW,KTW,NF,QBE,TYD,FBDF,Jinsai and other brands,imports,domestic four-wheeled excavators,rotary rig,crawler cranes The chassis of the machine,the bulldozer,and the loss of the loss.The main products are:branches,dragging wheels,guidance wheels,driving teeth,chain assembly,chain board screws,Qianqiu frame,chain shelf,connecting rod, tightening oil cylinder,spring,mala head,bucket shaft,bucket,bucket,bucket,fight Axial sleeve,fighting ears,digging,U-racks,driving tooth screws,guidance wheel screws,etc. After the product was issued stricly,it was strictly inspected to meet the quality requirements of the host supporting manufacturers.It was sold wll across the country and exported to Southeast Asia,Europe and the United States and other countries to receive unanimous praise from users.

Since the establishment of an enterprise,adhering to the business purpose of"seeking survival with quality and creating a brand for development",in order to better adapt to the extensive needs of domestic and foreign industrial and mining accessories markets, enterprises have continuously renewed production equipment,and at the same time recruit professional and technical talents,and continuously strengthen strengthening Internal management of the enterprise strives to produce better products to meet the widespread needs of new and old customers from allwalks of life.Has a complete and scientific quality management system.The integrity,strength and product quality of Quanzhou Jinsai Machinery Co.,Ltd.have been recognized by the industry.Friends from allwalks of life are welcome to visit,guide,and business negotiations.