Allowable Limits For Load Chain And Hooks; Load Chain; Hooks (Top And Bottom) - Jet JLH series Operating Instructions And Parts Manual

Allowable Limits for Load Chain and Hooks

Load Chain

Carefully inspect the entire load chain. As
illustrated in Figure 8, measure five consecutive
links with calipers to find the length, Compare the
results with the table in Figure 8. Check every
three feet and especially where excessive wear is
indicated. Any load chain that shows noticeable
deformation or heat influence must be replaced
with a new one.
Never extend load chain by
welding a second piece to the original.
Hoist 5 Links Normal
Capacity (mm)
0.25 ton 45
0.5 ton 60
Figure 8
5 Links Limit
Replace if ≥
46.3
61.8
10

Hooks (Top and Bottom)

Replace the hook when the distance between
indicator points – "A" in Figure 9 – is wider than the
limits given in the table.
Never heat treat the hook or attach anything to the
hook by welding.
"A" Dimension
Hoist
Normal
Capacity
(mm)
0.25 ton 35.5
0.5 ton 41
Figure 9
"A" Dimension
Replace if ≥
37.3
43.1