The seals used in INA yoke type track rollers are shown in the following:
|Yoke type track roller|
|PWTR..-2RS||Protected lip seals on both sides|
by plastic axial plain washers
|NNTR..-2ZL||Sealing shield with lamellar rings|
In the three-stage concept, there is a gap seal between the plastic axial plain washer and the outer ring and a labyrinth seal between the formed seal lip and the undercut in the outer ring.
The disc spring shape of the axial plain washers gives a preloaded contact seal as the third stage. It also provides axial sliding contact between the outer ring and contact washers, thus reducing wear and grease consumption.
The INA bearings are greased using a lithium complex soap grease to GA08 and can be lubricated via the inner ring. Relubrication can be carried out using Arcanol LOAD150.