Quanzhou Mingzhu Technology Development Co., Ltd
| Production Method | Forging/Casting |
| Type | Top Roller |
| Material | 50Mn/40Mn2 |
| Payment Terms | T/T,D/P |
| Application | Excavator & Bulldozer |
| Supply Ability | 1500 MT/month |
| Delivery Time | 3-5 days |
| Color | Yellow & Black |
| Packaging Details | Export pallet packaging |
| Compatible Models | HITACHI EX70, EX60-5, EX75, ZAX70 (ZX70), ZAX65 |
| Brand Name | STST |
| Place of Origin | Fujian China |
| Model Number | EX70 |
| Certification | CE、CNAS、COC、SGS、ISO |
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Product Specification
| Production Method | Forging/Casting | Type | Top Roller |
| Material | 50Mn/40Mn2 | Payment Terms | T/T,D/P |
| Application | Excavator & Bulldozer | Supply Ability | 1500 MT/month |
| Delivery Time | 3-5 days | Color | Yellow & Black |
| Packaging Details | Export pallet packaging | Compatible Models | HITACHI EX70, EX60-5, EX75, ZAX70 (ZX70), ZAX65 |
| Brand Name | STST | Place of Origin | Fujian China |
| Model Number | EX70 | Certification | CE、CNAS、COC、SGS、ISO |
| High Light | ex70 track carrier roller ，ex70 bulldozer carrier roller ，ex60 track carrier roller | ||
The EX70 Top Roller is a precision-engineered undercarriage component designed for HITACHI EX70, EX60-5, EX75, ZAX70 (ZX70), and ZAX65 excavators. Also known as a carrier roller or upper roller, this component supports the upper track chain, maintains proper track alignment, and helps ensure smooth machine travel under demanding operating conditions.
Manufactured from premium alloy steel and equipped with a durable sealing system, this top roller is built to withstand heavy loads, abrasive environments, and continuous operation in construction, mining, and earthmoving applications.
This top roller is suitable for:
Please contact us with your machine model or part number for compatibility verification.
The carrier roller supports the upper section of the track chain, helping maintain correct track movement and reducing excessive track vibration during operation.
Manufactured from high-strength alloy steel for excellent structural integrity and long-term reliability under heavy working loads.
Advanced sealing technology helps retain lubricant while preventing dust, mud, water, and other contaminants from entering the roller assembly.
Heat-treated roller surfaces provide superior resistance to wear, impact, and abrasion, extending the lifespan of the undercarriage system.
Precision machining ensures accurate fitment and smooth roller rotation, contributing to improved machine efficiency and reduced component stress.
The sealed and lubricated design minimizes routine maintenance while supporting dependable long-term performance.
| Item | Description |
|---|---|
| Product Name | EX70 Top Roller |
| Alternative Names | Carrier Roller, Upper Roller |
| Compatible Models | HITACHI EX70, EX60-5, EX75, ZAX70 (ZX70), ZAX65 |
| Application | Excavator Undercarriage System |
| Material | High-Strength Alloy Steel |
| Heat Treatment | Induction Hardened |
| Sealing Type | Floating Seal System |
| Condition | New |
| OEM Service | Available |
The EX70 carrier roller is designed for use in a wide range of industries and job site conditions:
Its robust design ensures dependable performance even in challenging terrain and abrasive environments.
Proper undercarriage maintenance contributes to better machine productivity and lower operating expenses.
Every EX70 top roller undergoes strict quality inspection throughout the manufacturing process, including:
This quality-focused approach ensures consistent performance and reliable operation in the field.
A sealed carrier roller helps protect internal components from dust, mud, water, and other contaminants commonly found in construction and excavation environments. The sealed lubrication system reduces internal wear, extends service life, minimizes maintenance requirements, and helps ensure smooth track operation. Compared with non-sealed alternatives, sealed top rollers can improve undercarriage reliability, reduce downtime, and lower long-term operating costs.
The service life of a top roller depends on operating conditions, maintenance practices, terrain, and machine workload. Under normal operating conditions and proper maintenance, a high-quality EX70 carrier roller can provide long-lasting performance and help maximize undercarriage lifespan.
Common indicators include:
Replacing worn carrier rollers in a timely manner helps prevent additional undercarriage damage and costly repairs.
EX70 Top Roller, EX70 Carrier Roller, Bulldozer Carrier Roller, Bulldozer Top Roller, EX70 Top Roller for HITACHI
Company Details
Business Type:
Manufacturer
Year Established:
2006
Total Annual:
8000000-12000000
Employee Number:
67~120
Ecer Certification：
Verified Supplier
Quanzhou Mingzhu Technology Development Co., Ltd Quanzhou Mingzhu Technology Development Co., Ltd
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