Stober PK - 10.6.3 Radial Shaft Seal Rings; 10.6.4 Oil Expansion Tank

Fig.3: Force application points for hollow shaft
You can determine the permitted radial forces from the permitted tilting torque M
2kN
and M
2k,acc
. The actual
radial forces may not exceed the permitted radial forces. The permitted radial forces pertain to the shaft
end (x2=0).
( )
× × + × +
=
2ax * 2 2rad,acc* 2 2
2k,acc*
2 F y F x z
M
1000
For applications with multiple axial and/or radial forces, you must add the forces as vectors.
In the event of EMERGENCY OFF operation (max. 1000 load changes), you can multiply the permitted forces
and torques for F
2ax20
, F
2rad20
and M
2k20
by a factor of two.
Also note the calculation for equivalent values:
× × + + × ×
=
× + + ×
3 3
2m,1* 1* 2k,acc,1* 2m,n* n* 2k,acc,n*
3
2k,eq*
2m,1* 1* 2m,n* n*
n t M ... n t M
M
n t ... n t
× × + + × ×
=
× + + ×
3 3
2m,1* 1* 2rad,acc,1* 2m,n* n* 2rad,acc,n*
3
2rad,eq*
2m,1* 1* 2m,n* n*
n t F ... n t F
F
n t ... n t
10.6.3 Radial shaft seal rings
Leak-proofness
Our gear units are equipped with high-quality radial shaft seal rings and checked for leaks. However, a leak
cannot be fully ruled out over the length of use of a gear unit. If you use a gear unit with goods incompatible
with the lubricant, you must take measures to prevent direct contact with the gear unit lubricant in case of a
leak.
10.6.4 Oil expansion tank
The gear units have a higher fill level in mounting position EL5. The oil expansion tank prevents oil from es-
caping out of the gear unit.
Notes
• We recommend using an oil expansion tank in mounting position EL5 (additional cost) for fast running
gear units with an input speed n
1
> 1750 rpm and gear ratios i < 20.
• It is not possible to use an oil expansion tank if the plug connector is at 90°!
10.6 Project configuration 10 Khelical bevel geared motors
372