INTORQ BFK464-17R, Translation Of The Original Operating Instructions, Page: 20 / 55

Technical specifications
INTORQ | BA 14.0214 | 10/2019 20
4.4 Friction work / operating frequency
Friction work
Q [J]
R
Operating frequency S
h
[h ]
-1
1000000
100000
10000
1000
100
10
1 10 100 1000 10000
28R
25R
22R
20R
19R
18R
17R
Fig. 4: Friction work as a function of the operating frequency
–S
hue
–
1
Q
R
Q
E
S
hmax
In
=
– e
1 Q
hmax
Q
E
=
–S
hue
S
h
The permissible operating frequency S
hmax
depends on the amount of heat Q
R
(refer to Figure Friction
work / operating frequency, Page 20). At a pre-set operating frequency S
h
, the permissible amount of
heat is Q
Smax
.
Notice
With high speeds of rotation and switching energy, the wear increases, because very high
temperatures occur at the friction surfaces for a short time.