General Description - Tractel tralift TS Manual De Empleo Y Mantenimiento

Example 2: Ascertaining permissible load type:
An electric chain hoist of the ISO Group M5 is to be used for approximately 6 hours per working day, throughout its complete service life.
Consequently the electric chain hoist should be operated in accordance with the characteristics of the load type <1 light> (see table 1-1).
Table 1-1 Load collectives
Load type 1 Load type 2
light medium
k < 0.50 0.50 < k < 0.63
k = 0.50 k = 0.63
% of running time % of running time
Full load by way of an Frequently fully loaded,
exception, however, however continuously
predominantly lightly loaded
low loads
k = Load collective (type of load)

1.2 General description

Figure 1-1
1
2
3
4
Load type 3 Load type 4
heavy very heavy
0.63 < k < 0.80 0.80 < k < 1.00
k = 0.80 k = 1.00
% of running time % of running time
Frequently fully loaded, Regularly fully loaded
continuous average
loading
1 Housing
2 Motor and brake
3 Rotor shaft with integrated
slip clutch
4 Limit switch
5 Electrical controller
6 Chain drive
7 Gearbox
Control switch
Table 1-2 Operating conditions
ISO Group according M3 M4
to ISO 4301-1
Load collective Average running time per working day [h]
1 - light up to
2 - 4
k < 0.50 2
2 - medium up to
1 - 2
0.50 < k < 0.63 1
3 - heavy up to
0.5 - 1
0.63 < k < 0.80 0.5
4 - very heavy up to up to
0.80 < k < 1.00 0.25 0.5
single fall double fall
M5 M6 M7
over
4 - 8 8 - 16
16
2 - 4 4 - 8 8 - 16
1 - 2 2 - 4 4 - 8
0.5 - 1 1 - 2 2 - 4
5
6
7
9