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9 INTERNAL SELF-ALIGNING BALL & ROLLER BEARING UNITS

3. Internal clearance

The radial internal clearance of CBC spherical roller and Please consult CBC when the following extreme
double-row self-aligning ball bearings conforms to JIS, conditions are encountered:–
ISO and AFBMA standards. Table 9 applies to bearings • Tight fits are required on both inner and outer
having a cylindrical bore, and Table 10 those having a rings.
tapered bore. Bearings with greater than normal clear- • Shaft or housing fit is required to be tighter
ance should be used when the following conditions are than Those given in tables 12 and 13.
encountered: • A large temperature variation is likely between
• Heavy or shock loads. inner and outer ring.
• High ambient temperature. • Extremely small internal clearance can be
• Tight shaft or housing fit required. permitted to ensure satisfactory performance
of machinery in which the bearing is installed.

Table 9. Standard Tolerance Values for Radial Internal Clearance of Spherical Roller Bearing with Cylindical Bore.
N O N I M L A B O R E U T I N m 1 0 0 . 0 m
A I D M R E T E d mm C 2 N O R M A L C 3 C 4 C 5
O V . R E N I . L C . N I M M A . X . N I M M A . X . N I M M A . X . N I M M A . X . N I M M A . X
4 2 0 3 5 1 5 2 5 2 0 4 0 4 5 5 5 5 5 7 5 7 5 9
0 3 0 4 5 1 0 3 0 3 5 4 5 4 0 6 0 6 0 8 0 8 0 0 1
0 4 0 5 0 2 5 3 5 3 5 5 5 5 5 7 5 7 0 0 1 0 0 1 5 2 1
0 5 5 6 0 2 0 4 0 4 5 6 5 6 0 9 0 9 0 2 1 0 2 1 0 5 1
5 6 0 8 0 3 0 5 0 5 0 8 0 8 0 1 1 0 1 1 5 4 1 5 4 1 0 8 1
0 8 0 0 1 5 3 0 6 0 6 0 0 1 0 0 1 5 3 1 5 3 1 0 8 1 0 8 1 5 2 2
0 0 1 0 2 1 0 4 5 7 5 7 0 2 1 0 2 1 0 6 1 0 6 1 0 1 2 0 1 2 0 6 2
0 2 1 0 4 1 0 5 5 9 5 9 5 4 1 5 4 1 0 9 1 0 9 1 0 4 2 0 4 2 0 0 3
0 4 1 0 6 1 0 6 0 1 1 0 1 1 0 7 1 0 7 1 0 2 2 0 2 2 0 8 2 0 8 2 0 5 3
0 6 1 0 8 1 5 6 0 2 1 0 2 1 0 8 1 0 8 1 0 4 2 0 4 2 0 1 3 0 1 3 0 9 3
0 8 1 0 0 2 0 7 0 3 1 0 3 1 0 0 2 0 0 2 0 6 2 0 6 2 0 4 3 0 4 3 0 3 4
0 0 2 5 2 2 0 8 0 4 1 0 4 1 0 2 2 0 2 2 0 9 2 0 9 2 0 8 3 0 8 3 0 7 4
5 2 2 0 5 2 0 9 0 5 1 0 5 1 0 4 2 0 4 2 0 2 3 0 2 3 0 2 4 0 2 4 0 2 5
0 5 2 0 8 2 0 0 1 0 7 1 0 7 1 0 6 2 0 6 2 0 5 3 0 5 3 0 6 4 0 6 4 0 7 5
0 8 2 5 1 3 0 1 1 0 9 1 0 9 1 0 8 2 0 8 2 0 7 3 0 7 3 0 0 5 0 0 5 0 3 6
5 1 3 5 5 3 0 2 1 0 0 2 0 0 2 0 1 3 0 1 3 0 1 4 0 1 4 0 5 5 0 5 5 0 9 6
5 5 3 0 0 4 0 3 1 0 2 2 0 2 2 0 4 3 0 4 3 0 5 4 0 5 4 0 0 6 0 0 6 0 5 7
0 0 4 0 5 4 0 4 1 0 4 2 0 4 2 0 7 3 0 7 3 0 0 5 0 0 5 0 6 6 0 6 6 0 2 8
0 5 4 0 0 5 0 4 1 0 6 2 0 6 2 0 1 4 0 1 4 0 5 5 0 5 5 0 2 7 0 2 7 0 0 9
0 0 5 0 6 5 0 5 1 0 8 2 0 8 2 0 4 4 0 4 4 0 0 6 0 0 6 0 8 7 0 8 7 0 0 0 1
0 6 5 0 3 6 0 7 1 0 1 3 0 1 3 0 8 4 0 8 4 0 5 6 0 5 6 0 5 8 0 5 8 0 0 1 1
0 3 6 0 1 7 0 9 1 0 5 3 0 5 3 0 3 5 0 3 5 0 0 7 0 0 7 0 2 9 0 2 9 0 9 1 1
0 1 7 0 0 8 0 1 2 0 9 3 0 9 3 0 8 5 0 8 5 0 7 7 0 7 7 0 1 0 1 0 1 0 1 0 0 3 1
0 0 8 0 0 9 0 3 2 0 3 4 0 3 4 0 5 6 0 5 6 0 6 8 0 6 8 0 2 1 1 0 2 1 1 0 4 4 1
0 0 9 0 0 0 1 0 6 2 0 8 4 0 8 4 0 1 7 0 1 7 0 3 9 0 3 9 0 2 2 1 0 2 2 1 0 7 5 1
0 0 0 1 0 2 1 1 0 9 2 0 3 5 0 3 5 0 8 7 0 8 7 0 2 0 1 0 2 0 1 0 3 3 1 0 3 3 1 0 2 7 1
0 2 1 1 0 5 2 1 0 2 3 0 8 5 0 8 5 0 6 8 0 6 8 0 2 1 1 0 2 1 1 0 6 4 1 0 6 4 1 0 7 8 1
0 5 2 1 0 0 4 1 0 5 3 0 4 6 0 4 6 0 5 9 0 5 9 0 4 2 1 0 4 2 1 0 2 6 1 0 2 6 1 0 8 0 2

Table 9a. Standard Tolerance Values for Radial Internal Clearance of Self-aligning Ball Bearing with Cylindical Bore.
N O N I M A L B O R E U T I N 1 0 0 . 0 m m
A I D M E T E R d m m
C 2 N O R M A L C 3 C 4 C 5
O V E . R N I C . L . N I M M A . X . N I M M A . X . N I M M A . X . N I M M A . X . N I M M A . X
0 1 4 1 2 0 1 6 9 1 3 1 6 2 1 2 5 3 0 3 8 4
4 1 8 1 3 2 1 8 1 2 5 1 8 2 3 2 7 3 2 3 0 5
8 1 4 2 4 4 1 0 1 3 2 7 1 0 3 5 2 9 3 4 3 2 5
4 2 0 3 5 6 1 1 1 4 2 9 1 5 3 9 2 6 4 0 4 8 5
0 3 0 4 6 8 1 3 1 9 2 3 2 0 4 4 3 3 5 6 4 6 6
0 4 0 5 6 9 1 4 1 1 3 5 2 4 4 7 3 7 5 0 5 1 7
0 5 5 6 7 1 2 6 1 6 3 0 3 0 5 5 4 9 6 2 6 8 8
5 6 0 8 8 4 2 8 1 0 4 5 3 0 6 4 5 3 8 6 7 8 0 1
0 8 0 0 1 9 7 2 2 2 8 4 2 4 0 7 4 6 6 9 9 8 4 2 1
0 0 1 0 2 1 0 1 1 3 5 2 6 5 0 5 3 8 5 7 4 1 1 5 0 1 5 4 1
0 2 1 0 4 1 0 1 8 3 0 3 8 6 0 6 0 0 1 0 9 5 3 1 5 2 1 5 7 1
0 4 1 0 6 1 5 1 4 4 5 3 0 8 0 7 0 2 1 0 1 1 1 6 1 0 5 1 0 1 2

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