Liftket B13 - Measuring Wear and Replacing Load Hook

46
Chain dimensions
mm x mm
16 x 45
17.3 x 48
Nominal diameter of a single chain link
d in mm
16
17.3
Diameter wear threshold
d
m
in mm
14.4
15.6
Length measured on a single chain link
t in mm
45
48
Wear threshold for the length of a single chain link (max)
t
max
in mm
47.25
50.4
Length measured over 11 chain links
11 x t in mm
495
528
Wear threshold for the length of 11 chain links (max)
(11 x t)
max
in mm
504.9
538.5
Table No. 8: Chain dimensions
NOTE
As a replacement chain use only an original load chain supplied by the manufacturer
of the hoist.
When replacing the load chain, the chain guide and the chain hold-down must also be
replaced.
10.5 Measuring the wear of the load hook and replacing the load hook
NOTE
According to Part 1 of the DIN 15405 standards the load hook must be replaced if its
opening has expanded by more than 10% or if the height of the hook bottom has
decreased by more than 5%.
The base dimensions of the hook are contained in the hook certificate located in the
crane inspection log.
There may be no sharp dents or cracks on the hook bottom.