OWNER’S MANUAL
12
VERLINDE reserves the right to alter or amend the above information without notice
11/2018
6.5 Accessories
TIRLIFT 2 winches can be delivered with ropes and accessories.
6.6 FEM classification
There are eight groups of mechanisms:
FEM
1 Dm
1 Cm
1 Bm
1 Am
2m
3m
4m
5m
ISO
M 1
M 2
M 3
M 4
M 5
M 6
M 7
M 8
To define the group for a lifting machine, winch or hoist, three essential parameters must be
considered:
a-
The maximum load to be lifted
Including the weight of the rope and any lifting accessories present (hook etc.), except if they have a
total weight less than or equal to 5% of the load to be lifted.
b-
The duty factor
Indicates the extent to which the lifting machine is used at maximum load or with a reduced load.
There are four different duty factors:
Light
Lifting machines rarely subject to maximum load
and regularly used for very light loads.
k ≤ 0.5
Medium
Lifting machines quite often subject to maximum
load and regularly used for light loads.
0.5 < k ≤ 0.63
Heavy
Lifting machines often subject to maximum load and
regularly used for medium loads.
0.63 < k ≤ 0.8
Very
heavy
Lifting machines regularly subject to loads close to
the maximum load.
0.8 < k ≤ 1
For an exact classification, it is preferable to calculate the average cubic value using the following
formula:
where:
ß
= payload or partial load
rated capacity
t
= operating time with payload or partial load + dead load
total operating time
Y
=dead load
maximum capacity
t
Δ
= operating time with dead load only
total operating time
