Appendix C SHIPPING REEL CAPACITY
SHIPPING
REEL CAPACITY
While
it
is virtually impossible to calculate the precise length
of
wire rope that can
be spooled on a reel or drum, the following formula provides a close approximation.
The formula is: L =
(A+D)·
A·
B • K
Where:L
= length
of
rope (ft)
A
= depth
of
rope space on drum (inches)
B
= width
of
drum between flanges (inches)
D
= drum barrel diameter (inches)
K
= constant for given rope diameter (see table below)
H
= diameter
of
reel flanges (inches)
X
= clearance
TABLES1
"K"
FACTORS*
(0.2618/rope diameter squared)**
Diam.
Diam. Diam.
(inches)
K
(inches)
K
(inches)
1116
56.9
112
.950
1-3/8
3/32 25.4
9/16
.749
1-1/2
118
14.4 5/8
.608
1-5/8
5/32
9.38
11116
.502
1-3/4
3/16
6.48 3/4
.422
1-7/8
7/32
4.59
13/16
.360
2
114
3.73
7/8
.310
2-118
5/16
2.39 1
.237
2-114
3/8
1.69
1-118
.188 2-3/8
7/16
1.24 1-1/4
.152
2-112
K
.126
.106
.0900
.0775
.0675
.0594
.0521
.0469
.0421
.0380
* The values given for
"K"
factors take maximum allowable rope oversize into account. (See
Table 3, page 26). These
"K"
factor values do not apply to certain special ropes such as aircraft
cords and elevator ropes. Clearance
("X") should be about 2 inches unless rope-end fittings
require more.
**This formula
is
based on uniform rope winding on the reel.
It
will not give correct results
if
the
winding is non-uniform. The formula also assumes that there will be the same number
of
wraps
of
rope in each layer. While this
is
not strictly correct, there is no appreciable error in the result
unless the traverse
of
the reel is quite small relative to the flange diameter ("H").
Wire Rope Technical Board - Wire Rope Users Manual, Fourth
Edition·
131
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