Doosan DH300 Excavator Top Roller 30-Ton Lug-Pattern Carrier
Product Specifications
| Attribute | Value |
| Condition | 100% Brand-new |
| Marketing Type | Hot Product 2022 |
| Dimension | Standard |
| Terms Of Payment | 30% Downpayment,70% Before Shipment |
| Type | Single Flange/Double Flange |
| Heat Treatment | Quenching And Tempering |
| Certification | ISO.CE |
Product Description
The DH300 Top Roller is a precision-engineered component designed for 30-Ton Doosan DH300-series excavators. This lug-pattern carrier roller ensures durability, excellent load-bearing capacity, and smooth operation in demanding construction environments.
The DH300 top roller is a critical wear part in the undercarriage system of DH300-series excavators (including Daewoo DH300, DH300LC-7 models). Its primary function is to support the upper run of the rubber track, reducing friction between the track and excavator frame while ensuring smooth, consistent movement during operation. As a load-bearing component, it withstands repeated vertical and horizontal forces from the track, making durability and precision essential to prevent track slippage, uneven wear, and costly downtime.
Manufacturing Process & Materials
- 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
Top Roller, Excavator Top Roller, Bottom Roller DH300, Bottom Roller
Frequently Asked Questions
Q: Are you a trading company or manufacturer?
A: We have over ten years of export experience and operate our own bushing factory. CCJT specializes in multiple resource integration with strong quality assurance and excellent service.
Q: What is your delivery time?
A: Typically 5-8 days after order confirmation, depending on quantity.
Q: Do you provide samples?
A: Standard product samples are free; customers cover shipping costs which are refundable with order placement.
Q: How do you ensure quality?
A: We manufacture to confirmed specifications with strict quality control, including production inspections and final pre-shipment checks.
Q: Do you accept small orders?
A: We welcome all customers regardless of order size and are committed to mutual growth.
