Product Description
| Material | 50mn,40mn2 |
| Part No. | KM2143,209-30-00191,VPI VKM2143V,209-30-00181,209-30-00191|CR4703,KM2461,A9460000M00,VKM2461V |
| Finish | Smooth |
| Colors | Black, yellow, or customized |
| Technology | Forging/Casting |
| Surface Hardness | HRC55-60,depth: 8mm-12mm |
| Warranty time | 12 Months |
| Delivery Time | 25-30 days |
PC750 BOTTOM ROLLER PART NO.:21N-30-00020
Product Overview
Part Number: 21N-30-00020
Fit Equipment: Komatsu PC750 Heavy Mining Excavator
This track roller (bottom roller) is a heavy-duty aftermarket replacement undercarriage wear part engineered for Komatsu PC750 large mining excavators. Forged from high-strength alloy steel and processed with full-surface deep carburizing quenching heat treatment, it is fitted with a triple-layer anti-leak oil seal system. The roller bears the full weight of the whole machine and enables steady track chain movement under severe heavy-load working conditions of open-pit mines and stone quarries.
Core Advantages
Precision Machined Replacement Installation Dimensions
Roller width, spindle length and mounting hole dimensions are precisely machined to perfectly fit Komatsu PC750 excavators. Direct bolt-on installation is available without cutting or secondary modification.
Ultra Deep Hardened Roller Surface
Deep carburizing quenching delivers ultra-high surface hardness and superior wear resistance, greatly extending service life on rocky mining operation sites.
Triple Multi-Layer Mud-Proof Oil Seal
High-temperature and sediment-resistant composite rubber seals effectively block mud and water ingress while preventing grease leakage, significantly prolonging maintenance intervals.
Oversized Heavy-Duty Internal Bearing
Features powerful heavy-load bearing capacity and smooth stable rotation to avoid track shaking, jumping and track chain derailment.
Strict Factory Full Inspection
Each bottom roller undergoes hardness testing, hydraulic leak testing and dimensional calibration before packaging to guarantee consistent uniform quality.
Compatible Machine
This aftermarket replacement track roller fits Komatsu PC750 crawler mining excavator perfectly.
If you cannot confirm compatibility, send your machine model and photos of your old track roller to our sales team for fast professional matching.
Application
Load-bearing replacement bottom track roller for Komatsu PC750 heavy mining excavators, widely applied to open-pit mining, stone quarries and large-scale earthmoving heavy machinery chassis load-bearing systems.
Packing & Delivery
Adopt shockproof export wooden cases and fumigated wooden pallets for outer packaging.
We support bulk wholesale orders, mixed full-set undercarriage spare parts orders, fast mass production lead time and global door-to-door logistics delivery service.
Why Choose MUYE Aftermarket Undercarriage Parts
MUYE Machinery has specialized in aftermarket heavy mining & mini excavator chassis spare parts for over 10 years:
- Complete product lineup including track rollers, top rollers, idlers, sprockets and track shoes compatible with Komatsu, Hitachi, Kobelco, CAT, Sumitomo and other mainstream construction machinery brands
- Direct factory supply with competitive wholesale prices, no extra markup from middlemen
- All aftermarket undercarriage wear parts are covered by a 12-month quality warranty
- Professional technical team provides accurate model matching and installation guidance
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