Conveyor bearings

A unique SKF Three-Barrier Solution for conveyor applications that are exposed to extremely harsh conditions introduces environmentally friendly products designed to increase bearing reliability and extend service life without the use of solid lubricants, auxiliary seals, or large quantities of grease. This solution ideally suits operations in the mining, cement and aggregates industries.

The Three-Barrier Solution consists of four interrelated components: Factory-sealed and upgraded SKF Explorer performance class spherical roller bearings, optimized split pillow block housings, PosiTrac Plus type seals for the housing, and 60 to 80 percent grease fill inside the housing.

The bearing is lubricated, sealed and mounted inside the housing, which is then internally greased and sealed. This creates three layers (three barriers) of protection for the bearing during operation: The integral bearing seals keep the lubricant in and contaminants out of the bearing cavity; the PosiTrac Plus seals in the housing protect against extremely fine contaminants and eliminate any need for expensive auxiliary (such as taconite) seals; and, the grease packed into the housing on both sides of the sealed bearing complete the protection. — SKF USA Inc.,