Stober PK - Recommendation for Radial Shaft Seal Rings

( )
× × + × +
=
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
2ax100
, F
2rad100
and M
2k100
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
The following apply to the bearing service life L
10h
(ED
10
≤ 40%):
L
10h
> 10000 h with 1 < M
2kN
/M
2k*
< 1.25
L
10h
> 20000 h with 1.25 < M
2kN
/M
2k*
< 1.5
L
10h
> 30000 h with 1.5 < M
2kN
/M
2k*
For different duty cycles:
10
10h 10h(ED 40%)
10
40%
L L
ED
=
> ×
8.6.3 Recommendation for radial shaft seal rings
For a duty cycle > 60% and higher surrounding temperatures, we recommend radial shaft seal rings made of
FKM at the output.
Properties:
• Excellent temperature resistance
• High chemical stability
• Very good resistance to aging
• Excellent resistance in oils and greases
• For use in the food, beverage and pharmaceutical industries
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.
8.6 Project configuration 8 PHKright-angle planetary geared motors
256