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As is well known, WIRTGEN road milling machines achieve high advance rates, even with great milling depths. The crawler units on road milling machines are exposed to very high load conditions. Load is mainly absorbed by the track rollers since they take the weight of machines and ensure excellent in-line tracking.

WIRTGEN uses high-quality track rollers mounted in antifriction or friction bearings which have been exclusively developed for the respective machine types concerned. Particular emphasis was placed on optimal performance without maintenance.

1 Perfectly matched hardness between the true-toline treads and the WIRTGEN crawler track chains.

2 Maintenance-free seals avoid laborious seal changes and, consequently, reduce machine downtimes.

3 The reliable oil lubrication ensures ideal heat dissipation and low wear.

4 No oil top-up or replacement is required in the antifriction bearings.

5 A long service life is ensured thanks to precise roller bearing setting.