Quanzhou Mingzhu Technology Development Co., Ltd
| Material | High-Strength Forged & Cast Alloy Steel |
| Machine Model | E303 |
| Packaging Details | Export pallet packaging |
| Heat Treatment | Induction Hardened Roller Surface |
| Supply Ability | 1500 MT/month |
| Payment Terms | D/P |
| Seal Type | Floating Duo Cone Seal |
| Delivery Time | 3-5 days |
| Product Name | E303 Top Roller |
| Roller Shell Hardness | HRC 52–58 |
| Certification | CE、CNAS、COC、SGS、ISO |
| Model Number | E303 |
| Brand Name | STST |
| Place of Origin | Fujian, China |
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Product Specification
| Material | High-Strength Forged & Cast Alloy Steel | Machine Model | E303 |
| Packaging Details | Export pallet packaging | Heat Treatment | Induction Hardened Roller Surface |
| Supply Ability | 1500 MT/month | Payment Terms | D/P |
| Seal Type | Floating Duo Cone Seal | Delivery Time | 3-5 days |
| Product Name | E303 Top Roller | Roller Shell Hardness | HRC 52–58 |
| Certification | CE、CNAS、COC、SGS、ISO | Model Number | E303 |
| Brand Name | STST | Place of Origin | Fujian, China |
| High Light | e303 excavator upper roller ，undercarriage roller crack resistant ，e303 undercarriage roller | ||
The E303 Top Roller is a premium excavator undercarriage carrier roller engineered to support the upper track chain with exceptional stability and durability. Designed for demanding construction, mining, quarrying, and earthmoving applications, this top roller is manufactured from high-strength alloy steel using precision forging, CNC machining, induction hardening, and advanced heat treatment processes.
The reinforced roller body is engineered to withstand repeated impact loads and cyclic stress generated during excavator operation. Optimized material selection and controlled heat treatment help minimize the risk of cracking and structural deformation.
Every roller is precision machined to maintain strict manufacturing tolerances. Accurate dimensions ensure proper alignment with the undercarriage assembly, simplify installation, and reduce abnormal wear caused by improper fitment.
The induction-hardened roller shell provides excellent resistance to abrasive wear while maintaining a tough inner core capable of absorbing heavy operational loads.
The precision-ground roller surface supports smooth movement of the upper track chain, reducing rolling resistance, vibration, and unnecessary stress on adjacent undercarriage components.
The floating Duo Cone sealing system effectively protects the bearing chamber from dust, mud, moisture, and abrasive particles while retaining lubricant for extended maintenance intervals.
Feature | Customer Value |
|---|---|
| Crack-Resistant Roller Design | Enhances durability under repeated impact loading |
| High Dimensional Accuracy | Ensures precise installation and OEM compatibility |
| Hardened Roller Shell | Improves wear resistance and extends service life |
| Precision Bearing Assembly | Supports smooth and stable roller rotation |
| Premium Alloy Steel | Delivers outstanding structural strength |
| Floating Duo Cone Seal | Protects against contamination and lubricant loss |
| Heat-Treated Construction | Balances hardness with impact toughness |
| Corrosion-Resistant Coating | Improves durability during storage and operation |
Every E303 top roller is subjected to comprehensive inspections throughout production:
Raw material certification
Chemical composition analysis
Heat treatment verification
Surface and core hardness testing
Precision dimensional inspection
Bearing fit verification
Seal integrity testing
Dynamic balance and rotation inspection
Surface finish evaluation
Final packaging inspection
Strict quality management ensures consistent product reliability and dependable field performance.
Precise dimensions ensure correct alignment with the undercarriage system, reducing installation time, minimizing abnormal wear, and helping maintain smooth track movement.
The combination of premium alloy steel, optimized structural design, controlled heat treatment, and reinforced roller construction improves resistance to impact fatigue and stress-related cracking.
The hardened outer layer resists abrasion from continuous contact with the track chain, while the tough core absorbs heavy loads without becoming brittle.
E303 Top Roller, High Dimensional Accuracy E303 Top Roller, Excavator Undercarriage Carrier Roller, Top Roller, Crack-Resistant Roller Design E303 Top Roller
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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