12
9.0 Load and wear limits
9.1 Alloy steel chain
Carefully inspect entire load chain. As illustrated in
Figure 15, measure five consecutive links with
calipers to measure the length. 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.
Figure 15
Capacity
5 Links Normal
(mm)
5 Links Limit
Replace if:
0.5 ton 75 77.3
1 ton 90 92.6
1.5 ton 120 123.4
2 ton 120 123.4
3 ton 120 123.4
5 ton 150 154.3
10 ton 150 154.3
Table 2
9.2 Hooks (top and bottom)
See Figure 16.
Replace hook when “A” measurement is equal to
or greater than the “A” Limit in the table below.
Never heat treat the hook or attach anything to the
hook by welding.
Figure 16
Capacity
Load
chain
column
“A”
Norm
“A”
Limit
“B”
Norm
“B”
Limit
0.5 ton 1 1.36" 1.44" – –
1 ton 1 1.77” 1.88" – –
1.5 ton 1 1.86" 1.97" – –
2 ton 1 2.05” 2.17” – –
3 ton 2 2.45” 2.60” – –
5 ton 2 3.06” 3.24” – –
10 ton 4 – – 2.52” 2.67”
Table 3
A
B
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