| Load Conditions |
Examples |
Shaft Diameter (mm) |
Tolerance
of Shaft |
Remarks |
| Ball Brgs |
Cylindrical Roller
Brgs, Tapered
Roller Brgs |
Spherical Roller
Brgs |
| Radial Bearings with Cylindrical Bores |
Rotating
Outer
Ring Load |
Easy axial displacement of inner ring on shaft desirable. |
Wheels on
Stationary
Axles |
All Shaft Diameters |
g6 |
Use g5 and h5 where
accuracy is required.
In case of large bearings, f6 can be used to allow easy axial movement. |
| Easy axial displacement of inner ring on shaft unnecessary |
Tension Pulleys
Rope Sheaves |
h6 |
Rotating Inner
Ring Load or
Direction of
Load
Indeterminate |
Light Loads
or Variable
Loads
(< 0.06 C r ) |
Electrical Home
Appliances, Pumps,
Blowers, Transport
Vehicles, Precision
Machinery,
Machine Tools |
< 18 |
|
|
js5 |
|
| 18~ 100 |
< 40 |
|
js6 (j6) |
| 100 ~200 |
40~140 |
|
k6 |
|
140~200 |
|
m6 |
Normal Loads
(0.06 to 0.13 C r ) |
General Bearing
Applications,
Medium and
Large Motors,
Turbines, Pumps,
Engine Main
Bearings,
Gears,
Woodworking
Machines |
< 18 |
|
|
js5-6
(j5-6) |
k6 and m6 can be used for single-row tapered roller bearings and single-row angular contact ball bearings instead of k5 and m5. |
| 18~ 100 |
< 40 |
< 40 |
k5-6 |
| 100 ~140 |
40~ 100 |
40~ 65 |
m5-6 |
| 140 ~200 |
100~140 |
65~ 100 |
m6 |
| 200 ~280 |
140~200 |
100~140 |
n6 |
|
200~400 |
140~280 |
p6 |
|
|
280~500 |
r6 |
|
|
over 500 |
r7 |
Heavy Loads
or Shock Loads
(> 0.13 C r ) |
Railway Axleboxes,
Industrial Vehicles,
Traction Motors,
Construction,
Equipment,
Crushers |
|
50~ 140 |
50~ 100 |
n6 |
More than CN
bearing internal
clearance is necessary. |
|
140~200 |
100~140 |
p6 |
|
over 200 |
140~200 |
r6 |
|
|
200~500 |
r7 |
| Axial Loads Only |
|
All Shaft Diameters |
js6 (j6) |
|
| Radial Bearings with Tapered Bores and Sleeves |
| All Types of Loading |
General Bearing
Applications,
Railway Axleboxes |
All Shaft Diameters |
h9/IT5 |
IT5 and IT7 mean that
the deviation of the shaft
from its true geometric
from,e.g. roundness and
cylindricity should be
within the tolerances of
IT5 and IT7 respectively. |
Transmission Shafts,
Woodworking
Spindles |
h10/IT7 |
