British Pound
Click flag to change Currency
My Account You are not logged in
Login
 

Categories

Site Search

Information


Back to Index

Y-Bearing Seals

Since Y-bearings were originally developed for use in agricultural machines and equipment, much attention has been paid to their seals. For that very reason SKF Y-bearings are equipped with different seal configurations depending on the bearing series.

Standard sealThe standard seal for SKF Y-bearings is the "Superagriseal". It consists of a pressed sheet steel washer with a sealing lip made of acrylonitrile-butadiene rubber (NBR) vulcanized to its inner surface (fig). The non-contact sheet steel washer forms a narrow gap with the cylindrical surface of the inner ring shoulder and protects the land-riding seal against coarse contaminants.

Standard seal with additional flinger For more contaminated conditions, a sealed bearings with an inner ring extended on both sides, should be used. These bearings are equipped with additional plain sheet steel flingers outside the integral standard "Superagriseal" and are identified by the designation suffix 2F (fig). The flingers are made of sheet steel or stainless sheet steel respectively, have an interference fit on the inner ring and considerably enhance the seal's effectiveness without increasing friction.

Multiple sealFor Y-bearing arrangements requiring a high degree of reliability even under extremely contaminated conditions a bearings with an inner ring extended on both sides should be used with the highly efficient multiple sealing arrangement. In this sealing arrangement (fig), a flinger with a vulcanized rubber lip is fitted outside the standard "Superagriseal". This acrylonitrile-butadiene rubber (NBR) lip seals axially against the integral seal. The space between the integral seal and the rubberized flinger is filled with grease to provide additional protection.

Contact seals RS1Y–bearings with a standard inner ring, series 17262(00)-2RS1 and 17263(00)-2RS1, are equipped with the RS1 seals developed for standard SKF deep groove ball bearings (fig). These seals are made from acrylonitrile-butadiene rubber (NBR) with sheet steel reinforcement and seal against the cylindrical surface of the inner ring shoulder.

Contact seals LS8Y-bearings with a hexagonal bore, series YHB 2 and YHC 2, are equipped with LS8 seals (fig). These seals are made from acrylonitrile-butadiene rubber (NBR) with sheet steel reinforcement and seal against the cylindrical surface of the inner ring shoulder.

Triple lip sealsThe standard seal for SKF Y-bearings with square or hexagonal bore is a highly efficient triple lip contact seal (fig). It comprises a sheet steel washer, on which a triple lip seal made from acrylonitrile-butadiene rubber (NBR) is vulcanized, The non-contact sheet steel washer forms a narrow gap with the cylindrical surface of the inner ring shoulder and protects the land-riding seal lips against coarse contaminants.

ShieldsY-bearings are also available with shields (fig) and are identified by the designation suffix VP076.

Y-bearings fitted with non-contact pressed sheet steel shields are used in temperature or speed sensitive applications where additional friction is not desirable. In applications where shielded bearings are used, contamination should be severe and there should be no danger of water, steam or moisture entering into the bearing.

Permissible operating temperatures for seal materials

Contact seals can be used at operating temperatures between –30 and +100 °C. Temperatures up to +120 °C are also possible for brief periods, but with have a negative effect on the grease.


Terminology | Y-bearings with grub screw locking | Y-bearings with an eccentric locking collar | Y-bearings with a tapered bore | Y-bearings with a standard inner ring | Y-bearings with a hexagonal or square bore | Special design bearings | Seals | Dimensions | Tolerances | Radial internal clearance | Cages | Grease fill | Speeds | Shaft tolerances | Rubber seat rings | Axial load carrying ability | Equivalent bearing load | Mounting and dismounting | Designations

Back to Index

This page is still under construction. All bearing information remains the property and copyright of SKF Group.