Page 76 - The Tribology Handbook

olid bushes and thick- wall bearings WALL THICKNESS : HALF BEARINGS
100
Bore and outside diameter in metric sizes are chosen
from preferred number series, the wall thickness varying
accordingly but generally, within range shown in figures. 50
E "1
40

Wrapped bushes, thin- and medium- wall g- 20 F -
w
half bearings Z 15
Y
The housing for metric sizes is based on preferred number $ 10 -
series (IS0 Recommendation R497 Series R40') and wall l- 8-
thickness chosein from preferred thicknesses in table, but 6-
generally within range shown in figures. a 5-
3
4-
3-

2-
Preferred wall thickness (mm) and 1.5 1
typical tolerances I ,"",
1' I I IIII,
20 30 405060~80100 200 300 500 1000
Half bearings
Wrapped bushes HOUSING SIZE, rnm
Thin wall Medium wall
______
Thickness ToTolmtznce Thickness Tolerance Thickness Tolerance

0.75* 0.050 1.5 0.008 4.0 0.020
~
1 .o 0.050 1.75 0.008 5.0 0.020
1.5 0.050 2.0 0.008 6.0 0.020
2.0 0.080 2.5 0.010 8.0 0.025 WALL THICKNESS : BUSHES A
~ ~~
2.5 0.100 3.0 0.015 10.0 0.025 15.0
3.0 0.100 3.5 0.015 12.5 0.030 E 10.0
E 7.5
3.5 0.100 4.0 0.020 15.0 0.030 6.0
~~ 5.0
5.0 0.020 20.0 0.040 5 4.0
g 3.5
6.0 0.025 25.0 0.040 E 3.0
-I 2.5
8.0 0.025 < 2.0
1.5
10.0 0.030
1.0
12.0 0.030
0.75
* Non-preferred HOUSING SIZE, rnm

Wall thickness tolerance
Bushes are generally supplied with an allowance for
finishing the bore in situ by boring, broaching, reeming, or
ball burnishing, although prefinished bushes may be
available to special orders.
Half bearings are generally machined to close tolerances
on wall thickness and may be installed without further
machining.

AI 2.2