Rotary Seals - Dilanda.it

GAMMA Seal
Table XLVI
Lead-in chamfers
Medium
(Dirt)
Inside diameter
mm
Chamfer
mm
0 - 35 2
36 - 50 2
51 - 135 2
136 - 200 2
Tolerance
mm
-0.15
-0.25
-0.18
-0.28
-0.20
-0.30
-0.25
-0.35
Figure 67
Installation drawing
10°
2 R a =4
Fitting
Prior to being fitted, the sealing member shall be greased,
but not between the sealing member and the case. It is
important that the seal is fitted with adequate precision.
The seal shall be pressed onto the shaft with a uniform and
even pressure.
The case must not be tapped directly with the hammer. The
seal should therefore be pressed to the right position by
means of a suitable assembly tool (see Figures 69, 70 and
71). Since facial fixation beyond the press fit between the
seal and the shaft is not provided, the assembly tool should
be of a design as shown in Figures 69 and 71 in order to
obtain the installation width b as per the dimension tables.
ød h9
otherwise
g6/n6
Figure 68
Tolerance of the shaft, surface roughness
and chamfer of the shaft
The surface roughness of the shaft should not exceed 4 μm
Ra. In addition, the shaft should be provided with a
chamfer as per Figure 68. Sharp edges or burrs are not
permitted. In the case of width b, a variation of +0.5 mm is
permissible.
170
Latest information available at www.busakshamban.com
Edition April 2006