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