13
Checks on load hook (see Fig. 4 and Table 1)
Opening dimension A on the hooks is important. A hook with too large a maximum dimension has
been exposed to overloading or overheating. It therefore does not have the necessary load
capacity. The hooks may also have been exposed to long-term wear (dimension B).
Fig 3 The chain must not be twisted
Fig 4 Load hook
Hooks must be discarded and replaced if:
•
The maximum A value is exceeded (according to Table 1)
•
The minimum B value falls short (according to Table 1)
•
The hook shows signs of cracking
•
The hook is deformed or otherwise damaged
Defective hooks must be replaced before using the chain hoist again.
Table 1 Load hook
Max. load
t
0.25
0.5
1
2
3
5
10
Model
SPB025
SPB05
SPB10
SPB20
SPB30
SPB50
SPB100
Dimension I nominal
mm
23,08
25
29,5
38
41
46,5
52,5
Dimension I max
mm
25,2
26,5
31
39,5
42,5
48
57
Dimension K nominal
mm
15
19
25
33,5
39
44,5
62
Dimension K min
mm
13,5
17,1
22,5
30,2
35,1
40,0
55,8
Checks on load chain (see Fig. 5 and Table 2)
Inspect the load chain over its whole length to detect any deformed or otherwise damaged links.
Make a check measurement of suspect links. Measure the worn areas Also, every 300 mm
(normally), make check measurements of the internal length of 5 links (pitch dimension 5xP
–
according to Table 2).
