THE Y-bearings unit from SKF consists of a Y-bearing, sealed both sides with a convex-sphered, outside curved surface, and a locking device on the inner ring, supported in a housing with a corresponding concave-sphered seating.
The Y-bearing is based on a single row, deep grove ball bearing with bore tolerances which allows easy mounting on shafts.
The housings are either of cast iron, pressed steel or a composite polyamide (Y-TECH RANGE), with versions available in plummer (pillow) block units or square, round, oval or triangular flanged units.
An extreme temperature Y-bearing unit, made of a cast iron housing with a special galvanised coating, is also available for applications running temperatures from -150°C to 350°C.
For full protection, even under extreme operating conditions, all Y-bearing units are equipped with highly efficient rubbing seals, with slightly different designs depending on the series.
The seals are fitted with a lithium base grease of NLGI consistency 3, which has good corrosion inhibiting properties and is suitable for operating temperatures between -30°C and +110°C.
Depending on the series, the seals usually consist of pressed steel washers, on to the inside which a synthetic rubber sealing lip is vulcanised.
The pressed steel washer forms a narrow gap with the cylindrical surface or the inner ring shoulder and provides efficient protection for the land-riding sealing lip against coarse contaminants.
The bearings and housings are normally supplied complete, but may also be ordered as separate components.
The SKF range of Y-bearing units offers the performance features and the ease of fitting asked for by today's designers, together with the product availability and convenience demanded by today's bearing purchasers.
The basic features of quick and easy installation, together with minimal maintenance, remain the same, but an enhanced range gives a wider choice of applications.
A wider choice of improved seal options is also now available to provide longer life.