14
P1885E/EN 2008-07
86c_Wartung en bedingt.fm, 27.10.2010
Maintenance
6
6.1.1
Calculating a customer-specific maintenance plan
A service interval
W(1,2,3)
depends on the following factors:
T2
,
S
and
VS
are variable factors and can differ depending on the specific application.
Example for service interval W2:
After 500,000 rundowns (V),
a specific rundown time of 1.8 seconds (T1)
with an actual fastening time of 3 seconds (soft joint) and
3 completed shifts per day and 750 rundowns per shift:
You have to carry out the maintenance measures marked W2 after an operating time of 133 days.
Factor
Value assumed in
6.1, "Maintenance
plan"
Description
V
V1 = 100,000
V2 = 500,000
V3 = 1,000,000
Number of rundowns after a maintenance measure is pre-
scribed by Cooper Power Tools GmbH & Co. OHG.
T1
1.8 seconds
Specific rundown time, measured in life and endurance tests.
T2
2 seconds
Actual rundown time, depending on the hardness of the joint.
S
1; 2; 3
Number of shifts per day.
VS
750
Number of rundowns per shift.
W 1 2 3
V T1
T2 S
VS
------------------------------
=
W2
500000 1 8
3 3
750
---------------------------------
=
133
days
=
