Simple, economic Y-bearings and housings

Simple, economic bearing arrangements can be made using SKF's Y-bearing units, which are particularly suitable for mining and quarrying, construction equipment and agricultural machinery

Simple, economic bearing arrangements can be made using SKF's Y-bearing units, which are particularly suitable for applications in mining and quarrying, construction equipment and agricultural machinery.

The Y-bearing unit consists of a Y-bearing, which is a single row, deep groove ball bearing sealed at both sides with a sphered outside curved surface, and a Y-bearing housing, which is made of cast iron or pressed steel with a sphered bore.

The Y-bearing units are based on proven deep groove ball bearings, with bore tolerances allowing easy mounting on shafts.

The units can compensate for initial errors of alignment between shaft and housing of up to +/-50 during mounting and are capable of working at shaft speeds of up to 100 rev/min.

An extended inner ring, with holes to accept setscrews, enables simple shaft attachment, for metric shafts in the size range 12 to 100 mm diameter and for inch shafts from 5/8 to 4 inches in diameter.

All Y-bearing units are equipped exclusively with highly efficient rubbing seals, with slightly different designs depending on the series, for full protection even under extreme operating conditions.

They are filled with a lithium base grease of NLGI consistency 3 which has good corrosion inhibiting properties and is suitable for operating temperatures between -30 and +110C.

Depending on the series, the seals usually consist of a pressed steel washer, on to the inside of which a synthetic rubber sealing lip is vulcanised.

The pressed steel washer forms a narrow gap with the cylindrical surface of the inner ring shoulder and provides efficient protection for the land-riding sealing lip against coarse contaminants.

For more difficult conditions, the units can be fitted with flingers outside the seals, which considerably enhance the sealing effect without adding to the friction.

Flocked flingers of pressed steel, coated with a polyamide fibre flock, can also be supplied to provide further protection against moisture, mud, sand, soil and similar contaminants.

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