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PC120-5 PC120-6 OEM Replacement Top Roller 21W-30-00020 with Heat Treatment and CNC Precision for Excavator Undercarriage
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PC120-5 PC120-6 OEM Replacement Top Roller 21W-30-00020 with Heat Treatment and CNC Precision for Excavator Undercarriage
| MOQ: | 1PCS |
| Price: | US$19-34 |
| Standard Packaging: | Standard Export Packaging |
| Delivery Period: | 7-15Days |
| Payment Method: | L/C,T/T |
| Supply Capacity: | 10000PCS/Months |
Detail Information
Place of Origin
CHINA
Brand Name
ZTMC
Certification
ISO9001
Model Number
PC120-5/PC120-6
Features:
Durable
Specification:
As Customer Requestment
Production Method:
Casting;Heat Treatment
Warranty Time:
12 Months
Durability:
High Wear Resistance And Long Service Life
Specifiion:
100% New
Surfacetreatment:
Heat Treated And Coated For Wear Resistance
Featurse:
Durable
Color:
Yellow Or Black
Product Description
PC120-5 PC120-6 Top Roller, OEM Replacement Part 21W-30-00020, Carrier Roller for Excavator Undercarriage, Construction & Quarry Sites
This carrier top roller is a 1:1 OEM direct replacement for PC120-5 and PC120-6 excavators, with official part number 21W-30-00020. No cutting, drilling or secondary modification is required during installation. It adapts to long-term heavy-duty operation and resolves common undercarriage running issues of PC120-5 and PC120-6 equipment fleets.
Product Specification
| Item | Specification |
|---|---|
| OEM Part Number | 21W-30-00020 |
| Applicable Model | PC120-5 / PC120-6 |
| Machining Tolerance | ±0.01mm CNC ultra-precision machining |
| Heat Treatment Process | Overall quenching + stress relief tempering |
| Working Scenarios | Muddy construction site, gravel quarry, road renovation, rough earthmoving terrain |
| Installation Type | Plug-and-play OEM direct replacement |
Applicable Working Environments
These excavator models are widely used in municipal engineering, quarry operations and road maintenance. Long-term muddy water immersion, gravel friction and continuous impact load will cause ordinary rollers to develop track shaking, track sagging, seal leakage and shaft jamming. This component is built to suit complex working conditions and maintain stable operation.
Core Production Technology
One-piece integral forging steel blank is adopted to ensure structural stability. Dual heat treatment is applied: quenching improves surface hardness against abrasive wear; tempering eliminates internal stress to prevent shell cracking under repeated impact. All mounting holes and contact surfaces are CNC processed with machining error within 0.01mm, fully matching original factory dimensions.
On-site Installation Steps
- Raise the excavator track with a hydraulic jack to separate it from the ground and release partial track tension.
- Remove fixing bolts of the old roller, take out the damaged part and clean dust and sediment on the mounting base.
- Place the new roller in position and align the bolt holes accurately.
- Fasten all bolts with standard torque, reset track tension and test idle running.
- Confirm no abnormal vibration or friction noise to complete installation.
Optimized On-site Operation Performance
- Precise dimensions eliminate track deviation and walking vibration
- Reinforced sealing structure prevents muddy water ingress and oil leakage
- Complete heat treatment lowers the risk of roller shell fracture
- Direct installation saves on-site maintenance time and labor cost
Real Customer Cooperation Case
A local construction service team operates multiple PC120-5 and PC120-6 excavators. Generic rollers used before failed within 690-840 working hours. After switching to our products, the rollers run stably for over 1800 working hours without faults, reducing annual undercarriage maintenance costs by 33%.
FAQ
Q1: Does this part fit both PC120-5 and PC120-6?
A: Yes. Part No. 21W-30-00020 matches both models perfectly, no extra adjustment needed during installation.
Q2: What is the difference between your products and generic rollers?
A: Most generic products omit tempering and have dimensional tolerance above 0.05mm. Our dual heat treatment and 0.01mm high-precision machining ensure reliable performance in harsh environments.
Q3: Can you provide inspection documents for bulk orders?
A: Yes. We supply heat treatment test reports and dimensional inspection reports for all bulk shipments.
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