|
CHAIN SIZE |
CHAIN SIZE |
WORKING |
WEIGHT |
MATERIAL DIAMETER |
INSIDE LENGTH |
INSIDE |
|
1/4" |
7mm |
1,300 |
0.55 |
.275" |
1.24" |
.46" |
|
5/16" |
8mm |
1,900 |
0.79 |
.308" |
1.30" |
.49" |
|
3/8" |
10mm |
2,650 |
1.15 |
.367" |
1.45" |
.60" |
GRADE 30 WLL CHART
GRADE 30 PROOF COIL SELF COLOR CHAIN (NASM)
National Association of Chain Manufacturers
Welded Steel Chain Specifiations
TABLE I
|
NOT TO BE USED IN OVERHEAD LIFTING APPLICATIONS |
|
Nominal |
Material |
Working Load Limit |
Proof Test** |
Minimum |
Inside Length |
Inside Width |
|||||||
|
in |
mm |
in |
mm |
lbs. |
kg |
lbs. |
kN |
lbs. |
kN |
in |
mm |
in |
mm |
|
1/8 |
4.0 |
0.156 |
4.0 |
400 |
180 |
800 |
3.6 |
1,600 |
7.2 |
0.94 |
23.9 |
0.25 |
6.4 |
|
3/16 |
5.5 |
0.217 |
5.5 |
800 |
365 |
1,600 |
7.2 |
3,200 |
14.4 |
0.98 |
24.8 |
0.30 |
7.7 |
|
1/4 |
7.0 |
0.276 |
7.0 |
3,100 |
580 |
2,600 |
11.6 |
5,200 |
23.2 |
1.24 |
31.5 |
0.38 |
9.8 |
|
5/16 |
8.0 |
0.331 |
8.4 |
1,900 |
860 |
3,800 |
16.9 |
7,600 |
33.8 |
1.29 |
32.8 |
0.44 |
11.2 |
|
3/8 |
10.0 |
0.394 |
10.0 |
2,650 |
1,200 |
5,300 |
23.6 |
10,600 |
47.2 |
1.38 |
35.0 |
0.55 |
14.0 |
|
7/16 |
11.9 |
0.488 |
11.9 |
3,700 |
1,680 |
7,400 |
32.9 |
14,800 |
65.8 |
1.64 |
41.6 |
0.65 |
16.6 |
|
1/2 |
13.0 |
0.512 |
13.5 |
4,500 |
2,030 |
9,000 |
40.0 |
18,000 |
80.0 |
1.79 |
45.5 |
0.72 |
18.2 |
|
5/8 |
16.0 |
0.630 |
16.0 |
6,900 |
3,130 |
13,800 |
61.3 |
27,600 |
122.6 |
2.20 |
56.0 |
0.79 |
20.0 |
|
3/4 |
20.0 |
0.787 |
20.0 |
10,600 |
4,800 |
21,200 |
94.3 |
42,400 |
188.6 |
2.76 |
70.0 |
0.98 |
25.0 |
|
7/8 |
22.0 |
0.866 |
22.0 |
12,800 |
5,810 |
25,600 |
114.1 |
51,200 |
228.2 |
3.03 |
77.0 |
1.08 |
27.5 |
|
1 |
26.0 |
1.020 |
26.0 |
17,900 |
8,140 |
35,800 |
159.1 |
71,600 |
318.2 |
3.58 |
90.9 |
1.25 |
31.7 |
