Excavator U Frame & Four Wheels One Track for Hitachi ZAX200-5G, Hyundai R305-7 / R210-7

   Hitachi ZAX200-5G, Hyundai R305-7, R210-7 are mainstream 20-30 ton construction excavators; U-shaped frames (U link, bucket link) belong to the front-end connecting structural wear parts, while four wheels one track (drive sprocket, idler wheel, track roller, carrier roller, track chain assembly) are core undercarriage vulnerable components. Under harsh working conditions including rock quarrying, muddy construction sites, desert high-temperature operation, original spare parts have high prices and long delivery cycles, so overseas distributors are in urgent need of cost-effective aftermarket heavy-duty replacement parts with stable quality and spot inventory.
    Our company received a bulk order from a Central Asian construction machinery dealer recently, covering customized U-brackets for 3 hot-selling excavator models and complete sets of undercarriage four-wheel-one-track assemblies. We completed production, quality inspection and container loading within 7 working days, realizing fast delivery to the destination port, which has become a typical bulk supply case for our excavator chassis and connecting parts.

2. Product Material & Production Craftsmanship (Core Selling Points for B2B Buyers)
   ① Excavator U Frame / U Bracket

       Raw Material: High-strength wear-resistant alloy structural steel 40CrMnMo

     Production Process: Overall precision forging → high-temperature quenching + tempering heat treatment → CNC fine machining → stress relief processing → surface anti-rust spraying
     Performance Advantages: Thickened stress-bearing part design, strong impact resistance, no deformation under heavy digging load; precise hole position tolerance, perfect docking with boom, arm and bucket pins, no gap shaking, effectively extend the service life of pin bushings; anti-cracking performance is 35% higher than ordinary cast U frames, suitable for long-term heavy-load mining working conditions
  ② Four Wheels One Track (Complete Undercarriage Parts)
     All chassis components adopt mining-grade wear-resistant steel, passed ISO9001 quality certification, strict simulation wear test before delivery:
   1.Drive Sprocket: Integral forging + tooth surface quenching, high hardness tooth tip, anti-abrasion, long service life
   2.Idler Wheel & Track Roller: Cast steel hub + built-in double-layer sealed bearing, fully dust-proof, mud-proof and sand-proof, adapt to muddy and desert terrain
   3.Carrier Roller: Reinforced shaft body, anti-breakage under bumpy road driving
   4.Track Chain Assembly: 35MnB alloy steel chain link, sealed lubricated pin and bushing structure, low stretching rate, not easy to elongate and derail

3. Exact Adaptable Machine List

Product Item	Applicable Excavator Models	Supply Form
U-shaped Frame (U Link)	Hitachi ZAX200-5G	Single piece bulk / full machine set
U-shaped Frame (U Link)	Hyundai R305-7 / R210-7	Single piece bulk / full machine set
Four Wheels One Track Complete Set	ZAX200-5G / R305-7 / R210-7	Whole vehicle chassis assembly / Separate single parts wholesale

4. Our Wholesale & Global Supply Advantages
     1.Full Spot Inventory: All above models U frames and four-wheel-one-track parts are permanently in stock, MOQ flexible (support small trial order + large batch container order)
    2.Dual Quality Grade Optional: OEM matching standard grade / Mining reinforced heavy-duty grade, price is only 40%-55% of original factory parts
    3.Short Lead Time: Conventional bulk orders finished within 5-10 working days, support FOB/CIF/DAP global port delivery
    4.One-stop Procurement: Simultaneously supply bucket teeth, rocker arm, cylinder parts, hydraulic spare parts for Hitachi & Hyundai excavators, customers can consolidate goods in one container to save ocean freight cost

    5.After-sales Guarantee: Strict quality inspection before shipment, provide product wear cycle technical parameter sheet, solve overseas after-sales matching problems remotely

5. Case Summary & Cooperation Invitation
     This batch order fully verifies our capability in mass production, precise model matching and fast international logistics delivery for medium excavator structural parts and undercarriage vulnerable parts. Up to now, our excavator spare parts have been exported to Russia, Turkey, Iran, Southeast Asia, Middle East and other regions, maintaining long-term cooperative relations with more than 200 local machinery distributors and engineering companies.
    If you are engaged in construction machinery spare parts wholesale, excavator repair station operation, engineering fleet equipment maintenance, welcome to send us your required models and quantity, we will provide you with the most competitive wholesale quotation and detailed technical parameter documents.
Contact Info
WhatsApp / Email: +18902201555/+85259330234