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Y-Bearings

Y-bearings with grub screw locking

Y-bearings with grub screws in the inner ring are locked in position on the shaft by tightening the two cup point hexagonal grub (set) screws, positioned 120 apart. The bearings are suitable for applications where the direction of rotation is constant or alternating. Two different standard designs are available.

Y-bearings in the YAT 2 series have an inner ring extended on one side, and are sealed with the rugged standard "Superagriseal" . The outer ring has two lubricating holes as standard.

Y-bearing in YAT 2 series

Y-bearings in the YAR 2 series have an extended inner ring on both sides. This reduces the extent to which the inner ring can tilt on the shaft, which enables the bearing to run more smoothly. These bearings are fitted with the rugged "Superagriseal", and one of the following flinger options

Y-bearing in YAR 2 series

  • plain sheet steel flingers, designation suffix 2F, or
  • rubberised sheet steel flingers (multiple seal), designation suffix 2RF.

The outer ring has two lubrication holes as a standard. Bearings without lubrication holes can be supplied on request. These bearings are identified by the suffix W.

Bearings made of rolling bearing steel

YAT 2 and YAR 2 standard Y-bearings are manufactured from high-grade carbon chromium steel. The SKF range comprises bearings for

  • metric shafts from 12 to 100 mm diameter and
  • inch shafts from 1/2 to 3 inch diameter.

Bearings with zinc-coated bearing rings

Y-bearings with an extended inner ring on both sides - YAR 2 series - are also available with zinc-coated rings for use in corrosive environments. These bearings, series designation YAR 2-2RF/VE495,

  • use multiple seals made of food-compatible rubber and stainless steel flingers
  • are fitted with grub screws made of stainless steel
  • are filled with a food-grade grease
  • can be relubricated through one lubrication hole in the outer ring.

The SKF range of Y-bearings with zinc-coated rings covers bearings for metric shafts from 20 to 40 mm diameter.

Bearings made of stainless steel

All metal components of a stainless steel bearing are made of stainless steel. This includes the rings, balls, sheet metal parts of the seal and the grub screws. The inner ring is extended on both sides - YAR 2 series. These Y-bearings, series designation YAR 2-2RF/HV,

  • use multiple seals made of food-compatible rubber
  • are filled with a food-grade grease
  • can be relubricated through one lubrication hole in the outer ring.

The dynamic load carrying capacity of stainless steel bearings is less than that of a similarly sized standard steel bearing.

The SKF range comprises bearings for

  • metric shafts from 20 to 40 mm diameter
  • inch shafts from 3/4 to 1 1/2 inch diameter.


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

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