CALCULATING DRUM CAPACITY
Calculating Drum Capacity
Wire Rope
The length of rope that can be wound on a drum or reel may be calculated as follows. L = the length of rope in feet. All other dimensions are in inches.
L = (A + D) x A x B x K
K = Constant obtained by dividing .2618 by the square of the actual rope diameter.
A = (H-D)/2 Desired clearance, in inches.
B = Traverse in inches.
D = Barrel Diameter in inches.
H = Flange Diameter in inches.
L = Rope length in feet.
| Values of K | |||
| Rope Dia. | K | Rope Dia. | K |
| 1/4″ | 3.29 | 1 1/2″ | 0.107 |
| 5/16″ | 2.21 | 1 5/8″ | 0 .0886 |
| 3/8″ | 1.58 | 1 3/4 | 0.077 |
| 7/16″ | 1.19 | 1 7/8″ | 0 .0675 |
| 1/2″ | .925 | 2″ | 0.0597 |
| 9/16″ | .741 | 2 1/8″ | 0 .0532 |
| 5/8″ | .607 | 2 1/4″ | 0 .0476 |
| 3/4′ | .428 | 2 3/8″ | 0 .0421 |
| 7/8″ | .308 | 2 1/2″ | 0.038 |
| 1″ | .239 | 2 5/8″ | 0 .0345 |
| 1 1/8″‘ | 0.191 | 2 3/4″ | 0 .0314 |
| 1 1/4″ | 0.152 | 2 7/8″ | 0 .0287 |
| 1 3/8″ | 0.127 | 3″ | 0 .0264 |