SKF - Rolling Bearings

2 Y-bearings
Design for larger axial displacement
In applications where there are slow speeds
and light loads, a Y-bearing with grub screws
can be used to accommodate axial displacement.
The shaft at the non-locating bearing
position should be provided with one or two
grooves 120° apart, to engage a modified
grub screw:
• Hexagon socket grub (set) screws with a dog
point, in accordance with ISO 4028, but with
a fine thread according to table 10. The grub
screw should be secured by a nut and spring
washer or star lock washer († fig. 29).
• Slotted pan head screws in accordance with
ISO 1580, but with fine thread according to
table 10, locked with a spring or star lock
washer († fig. 30).
The screws and groove(s) accommodate
changes in shaft length and prevent the shaft
from turning independently of the bearing.
The ends of the grub screws should be ground
and the sliding surfaces in the shaft grooves
coated with a lubricant paste.
Fig. 29
Fig. 30
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