Page 40 - Y-bearing-units

Speeds

The speed at which a Y-bearing or Y-bearing The limiting speeds for Y-bearings and
unit can operate depends mainly on the type Y-bearing units for inch shafts are the same
of seal that is used and the method used to lock as those for the corresponding metric bearing.
the bearing onto the shaft. The permissible
operating speed also depends on the shaft
tolerance in applications with:

• Y-bearings with grub screws, YAT 2 and
YAR 2-2F series
• Y-bearings with an eccentric locking collar,
YET 2 and YEL 2-2F series

The higher the figure following the tolerance
symbol h, the lower the permissible speed.
Guideline values for the limiting speeds are
provided in table 1.
For bearings with multiple seals (2RF design),
the limiting speed is about 60% of the values
quoted in table 1 for bearings mounted on an
h6 tolerance shaft. For the following bearings,
the limiting speed depends on the seals:

• Y-bearings with a tapered bore on an adapter
sleeve, YSA 2-2FK + H 23 series
• Y-bearings with a standard inner ring,
17262(00)-2RS1 and 17263(00)-2RS1
series
• Y-bearings with SKF ConCentra locking, used
in SKF ConCentra ball bearing units only

The values for the limiting speed are provided in
the product tables and in table 1 to enable easy
comparison.

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