50Mn Alloy Steel Carrier Roller for Doosan Daewoo DH220 with HRC 52-58 Hardness and Double-Lip NBR Seals
Price:
US$25-34
MOQ:
1PCS
Delivery Time:
7-15Days
Brand:
ZTMC
Product Description
50Mn/35MnB Forged Carrier Roller for Doosan Daewoo DH220 – OEM Undercarriage Top Roller
Product Overview
This professional OEM replacement carrier roller (top roller) for Doosan Daewoo DH220 excavators is engineered for rigorous mining, construction, and heavy-duty environments. As a critical undercarriage component, it supports the upper track section, prevents track sagging, and ensures stable operation—directly impacting excavator efficiency and service life.
Key Features & Benefits
- Manufactured from high-quality 50Mn or 35MnB alloy steel (optional)
- Precision forging and casting with quenching and tempering heat treatment
- Superior structural density, tensile strength, and exceptional wear resistance
- Resists rock impact, gravel abrasion, and uneven terrain challenges
- Direct OEM replacement—no modifications required for installation
- Double-lip NBR seals prevent contaminant intrusion
- Reduces downtime and maintenance costs in mining and construction operations
- ISO9001 certified with 12-month warranty and online after-sales support
Technical Specifications
| Item | Specifications |
|---|---|
| Applicable Models | Doosan Daewoo DH220 Excavator |
| Material | 50Mn Alloy Steel / 35MnB Alloy Steel (Optional) |
| Manufacturing Process | Forging, Casting, Precision Machining, Quenching & Tempering |
| Surface Hardness | HRC 52-58 |
| Hardened Layer Depth | 8-12 mm |
| Sealing System | Double-Lip NBR Seals (Prevent Contaminant Intrusion) |
| Replacement Type | OEM Direct Replacement, No Modification Required |
| Quality Inspection | 100% Pre-delivery Dimensional, Hardness, Water Pressure & Air Tightness Test; Mechanical Test Report Available |
| Certification | ISO9001 |
| Warranty | 12-Month Warranty, Online After-Sales Support |
Frequently Asked Questions
Is this carrier roller fully compatible with Doosan Daewoo DH220 excavators?
Yes, it is manufactured in strict compliance with DH220 OEM dimensions, mounting standards, and undercarriage specifications, enabling direct replacement of the original part without any modifications—perfectly matching the DH220's track system and ensuring stable operation.
What makes 50Mn/35MnB forged material suitable for DH220 mining applications?
50Mn and 35MnB alloy steels offer excellent hardness and wear resistance, while the forging and casting processes enhance material compactness and fatigue resistance. This combination prevents premature damage, deformation, and crack expansion caused by heavy loads, rock impact, and harsh mining terrain.
Are all DH220 carrier rollers inspected before shipment?
Yes, every unit undergoes 100% comprehensive inspection, including dimensional accuracy verification, surface hardness testing, 2.4MPa water pressure test, and air tightness test. We provide mechanical test reports and video inspections to ensure transparency and quality standards.
What is the function of this carrier roller for the DH220 excavator?
As a top roller, it is installed on the top inside the track, responsible for supporting the upper track section, preventing track sagging or rolling over, and ensuring the track runs parallel and smoothly. This improves the DH220's operational stability and extends undercarriage system service life.
Is this product suitable for global shipping to mining sites?
Yes, it is packaged in export-standard fumigated wooden pallets (moisture-proof, shock-proof, and anti-collision), capable of withstanding long-distance sea, land, and air transportation. We support shipping from major Chinese ports, ensuring intact delivery to global mining sites.
Packaging & Transportation
- Packaging: Export-standard fumigated solid wooden pallets with moisture-proof, shock-proof, and anti-collision properties. Custom packaging available for orders of 5+ pieces.
- Transportation: Suitable for sea, land, and air freight. Customized transportation solutions with delivery within 15 days after contract establishment (adjustable based on order quantity).
- Loading & Unloading: Wooden pallet design compatible with standard handling equipment at ports and mining yards. Sample service available for quality verification before bulk orders.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Nan'an Zhongte Engineering Machinery Factory
Location
No. 105, Shangdian Street, Changfu Village, Xiamei Town, Nan'an City, Quanzhou City, Fujian Province
Contact Person
Mr.