Method of Reeving Manila & Wire Rope Blocks
Methods of REEVING TACKLE BLOCKS vary with the application and purpose for which they are to be employed, especially on Heavy Lift Cargo Booms, Cranes, etc. where Block with 4 Sheaves or more are required, in which case a number of Lead Blocks have to be considered. We will be glad to consult with you on this matter.
| PARTS OF LINE | ‘‘E’’ FACTORS BRONZE BUSHED |
‘‘E’’ FACTORS ROLLER BEARING |
|---|---|---|
| 1 | 0.96 | 0.98 |
| 2 | 1.85 | 1.9 |
| 3 | 2.8 | 2.9 |
| 4 | 3.6 | 3.8 |
| 5 | 4.4 | 4.7 |
| 6 | 5.2 | 5.6 |
| 7 | 5.9 | 6.5 |
| 8 | 6.6 | 7.3 |
| 9 | 7.3 | 8.2 |
| 10 | 7.9 | 9.0 |
| 11 | 8.5 | 9.8 |
| 12 | 9.1 | 10.6 |
METHOD OF FIGURING ‘‘PARTS OF LINE’’
L = Load Lifted in Lbs.
P = Line Pull in Lbs.
E = Efficiency Factor
For Example: To figure ‘‘Parts of Line’’required when Load Lifted ‘‘L,’’ and Line Pull ‘‘P’’ are known.
‘‘E’’ factor 5.3 in table indicated 6 ‘‘Parts of Line’’ required.