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PH: 216-241-0333
FAX: 216-241-3426
TOLL FREE: 800-892-8012
1285 Old River Road
Cleveland, Ohio 44113 |
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HOW TO FIGURE OVERHAULING WEIGHTS
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This is a conservative method of approximating the load block weight
required to overhaul the wire rope properly on crane applications.
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TAKE: Approximate weight of wire rope on backside of boom (Table A: x boom length)
+ Pull required to overcome friction of hoist drum (nominally 100 pounds)
x Overhaul
factor for number of load lines (Table B)
= Required
weight of load block
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TABLE A: WIRE ROPE WEIGHT |
| SIZE |
LBS. PER FT.,
6 X 19 WRC |
| 3/8 |
.26 |
| 7/16 |
.36 |
| 1/2 |
.46 |
| 9/16 |
.59 |
| 5/8 |
.72 |
| 3/4 |
1.04 |
| 7/8 |
1.42 |
| 1 |
1.85 |
| 1-1/8 |
2.34 |
| 1-1/4 |
2.89 |
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TABLE B: OVERHAUL FACTORS |
| NO. LINES |
ROLLER BEARING SHEAVES |
BRONZE BUSHED SHEAVES |
| 1 |
1.03 |
1.05 |
| 2 |
2.07 |
2.14 |
| 3 |
3.15 |
3.28 |
| 4 |
4.25 |
4.48 |
| 5 |
5.38 |
5.72 |
| 6 |
6.54 |
7.03 |
| 7 |
7.73 |
8.39 |
| 8 |
8.94 |
9.80 |
| 9 |
10.20 |
11.30 |
| 10 |
11.50 |
12.80 |
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EXAMPLE:
5 Parts 7/8" wire rope. 50' boom, roller bearing sheaves.
Required Weight = [A(50) + 100] B =[1.42(50) + 100] 5.38 = (171) 5.38 = 920 Ibs. |
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Centrally Located In
Cleveland Flats
1285 Old River
Road
Cleveland, Ohio 44113
Store Hours:
Monday Thru Friday
7:30AM – 5:00PM
Saturday
8:00AM – 4:30PM
216-241-0333
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HOW-TO GUIDES
