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Tapered Roller <strong>Bearings</strong><br />
TAG MARKINGS<br />
Bearing tag markings are a device to indicate accuracy of bearings<br />
and facilitate selective assembly.<br />
The in<strong>for</strong>mation given on the tag varies by metric and inch systems,<br />
bearing class and type.<br />
All components more precise than Class C or 3 cones and cups<br />
are supplied as matched assemblies and are shipped as complete<br />
bearings.<br />
B<br />
1. METRIC SYSTEM PRECISION BEARING TAG MARKINGS<br />
Tags shown below are supplied with all Class A single row matched assemblies.<br />
Class B cups and cones are tagged if indicated on the per<strong>for</strong>mance code.<br />
Tag markings on class A only<br />
TS-TSF<br />
FIRST<br />
NUMBER<br />
Indicates<br />
average<br />
deviation in<br />
cone bore<br />
from nominal<br />
dimension.<br />
Use pages<br />
237-238.<br />
SECOND<br />
NUMBER<br />
Indicates<br />
average<br />
deviation<br />
in cup O.D.<br />
from nominal<br />
dimension.<br />
Use pages<br />
237-238.<br />
THIRD<br />
NUMBER<br />
Indicates<br />
runout (total<br />
indicator<br />
reading)<br />
of cone<br />
assembly.<br />
Use pages<br />
237-238.<br />
FOURTH<br />
NUMBER<br />
Indicates<br />
runout (total<br />
indicator<br />
reading) of<br />
cup.<br />
Use pages<br />
237-238.<br />
FIFTH<br />
NUMBER<br />
Indicates<br />
year of<br />
manufacture:<br />
07 … 2007<br />
08 … 2008<br />
etc.<br />
Found only<br />
on matched<br />
assemblies.<br />
SIXTH<br />
NUMBER<br />
Indicates<br />
numerical<br />
number of<br />
bearing<br />
in yearly<br />
manufacture.<br />
Found only<br />
on matched<br />
assemblies.<br />
2. INCH SYSTEM PRECISION BEARING TAG MARKINGS<br />
Tags shown below are supplied with all Class 00 cups and cones.<br />
Class 0 cups and cones are tagged if indicated on the per<strong>for</strong>mance code.<br />
Tag markings on class 00 only<br />
TS-TSF<br />
FIRST<br />
NUMBER<br />
Indicates<br />
average<br />
deviation<br />
in cone<br />
bore from<br />
nominal<br />
dimension.<br />
Use pages<br />
237-238.<br />
SECOND<br />
NUMBER (1)<br />
Indicates<br />
average<br />
deviation<br />
in cup O.D.<br />
from nominal<br />
dimension.<br />
Use pages<br />
237-238.<br />
THIRD<br />
NUMBER<br />
Indicates<br />
runout<br />
(total<br />
indicator<br />
reading)<br />
of cone<br />
assembly.<br />
Use pages<br />
237-238.<br />
FOURTH<br />
NUMBER<br />
Indicates<br />
runout (total<br />
indicator<br />
reading) of<br />
cup.<br />
Use pages<br />
237-238.<br />
FIFTH<br />
NUMBER<br />
Indicates<br />
year of<br />
manufacture:<br />
07 … 2007<br />
08 … 2008<br />
etc.<br />
Found only<br />
on matched<br />
assemblies.<br />
SIXTH<br />
NUMBER<br />
Indicates<br />
numerical<br />
number<br />
of bearing<br />
in yearly<br />
manufacture.<br />
Found only<br />
on matched<br />
assemblies.<br />
A<br />
(1) Second number marked only on Class 3 product over 304.800 mm (12.0000 in.) cup O.D.<br />
TIMKEN MACHINE TOOL CATALOG 109
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