Page 1012 - Rollingbearings

18 High temperature bearings
Insert bearings Fig. 9

for high High temperature insert bearing variants

temperature
applications

Except for the cage and seals, SKF insert
bearings (Y-bearings) for high temperature
applications correspond in design to stand-
ard insert bearings with grub screws in the
YAR 2-2F series (page 342)
The grub (set) screws in the inner ring
enable quick and easy mounting/dismount-
ing The bearings have a shield and a linger
on both sides to prevent the ingress of solid VA201 VA228
contaminants into the bearing
The entire surface of the bearing and the
shields are manganese phosphated to
18 enhance adhesion of the lubricant to the Table 2
metal and improve the running-in proper- Characteristics of high temperature variants for insert bearings
ties of the bearing The lingers are treated
by pickling Characteristics Variants VA228
VA201

The radial internal clearance is a multiple
of C5 to prevent the bearings from seizing,
even when they cool rapidly. Lubrication type Polyalkylene glycol/ Coronet cage made of
graphite mixture graphite
Phosphated rings, rolling elements and ✔ ✔
cages
Designs and variants NSF H1 food grade ✘ ✔

Shields and lingers (sufix 2F) ✔ ✔
The SKF assortment of insert bearings for
high temperature applications (ig. 9) pro- Relubrication-free ✔ ✔
vides solutions for various combinations of
Maximimum operating temperature 250 °C (480 °F) 350 °C (660 °F)
operating temperature and speed.
The lubrication type, maximum operating Limiting speed [r/min] 1) 4 500 / d m 9 000 / d m
temperature, limiting speed, maintenance
requirements and all other primary charac-
teristics of the variants within the assort-
ment are listed in table 2.

1) d m = bearing mean diameter = 0,5 (d + D) For outer ring rotation, use d m = D

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