Top Roller / Upper Roller
Top roller shell:
•surface quenching HRC 54-60
•face hardening depth(bulldozer 5-7mm,excavator 4-5mm)
•Corner hardening depthmore than 1.5mm
Top Roller is used to support the track upwards, and make the track keep a good tensity.
Best selected sealing and lifelong lubrication design enable our top roller to have longer working life and perfect performance.
The machining process of our Top Roller:
Forging — Rough Turning — Heat Treatment — Finish Turning — Assembly — Spraying Paint
Heat Treatment Technical Data for BBY Top Roller:
Top roller shell:
• surface quenching HRC 54-60
• face hardening depth(bulldozer 5-7mm,excavator 4-5mm)
• Corner hardening depth more than 1.5mm
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