Product Description
| Material | 50Mn |
| Part No. | 3S9983 |
| Finish | Smooth |
| Colors | Black / Yellow |
| Technique | Forging casting |
| Surface Hardness | HRC55-58 |
| Warranty time | 2000 hours |
| Delivery Time | Within 20 days after contract established |
The Upper roller, which is also called carrier roller or top roller, is one part of undercarriage parts for crawler heavy equipments such as excavator, bulldozer, crane, drilling machine etc.
Excavator upper roller is made of roller body, shaft, collars, Bi-metallic Bearings and seal group. It is made by forging, machining, heat treatment, assembly, painting etc.
The quality and working life depends on the quality of raw steels, the hardness of rail surface, the depth of hardness layer, the quality of seal group etc.
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