Fid information – Samson MISCELLANEOUS Tools Required for Splicing User Manual
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© 2012 Samson Rope Technologies, Inc. All rights reserved.
S/WD #108294 7/2012
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Fid Information
S A M S O N S P L I C I N G I N S T R U C T I O N S
DOCUMENT ToolsMaterials_Required_SEPT2012.pdf
F i D l e n g T h D e F i n i T i o n
The length of the splicing tool, called a “fid,” may or may not have a 1:1 correlation with the fid length for a given rope diameter.
The “fid length” for a rope is calculated as 21 times the rope diameter. As the rope diameter increases, so does the fid length.
For example the fid length for a 4" diameter rope is 84".
To keep fids to a manageable length, they may be scaled to the actual fid length of a given rope diameter. Our tubular fids are
100% scale, meaning that the overall length of the tool is equal to the actual fid length for the corresponding rope diameter. Our
wire fids are 1/2 scale, meaning that the length of the tool is 1/2 the actual fid length for the corresponding rope diameter.
c a l c u l aT i n g F i D
s h o r T s e c T i o n
1/4" – 1/2" short section
is 37.5% of fid length
9/16" – 3/4" short section
is 30% of fid length
7/8" and up short section
is 25% of fid length
w i r e F i D s
For rope sizes above 3" circumference (1" diameter), use a wire fid.
fid scale: 1/2 (for rope diameters between 1" and 2").
1"
10-1/2"
2-5/8"
1-1/8"
12-1/4"
3"
1-1/4"
13-1/4"
3-1/4"
1-5/16"
14"
3-1/2"
1-1/2"
16"
4"
1-5/8"
17-1/2"
4-1/2"
1-3/4"
19"
4-3/4"
2"
21"
5-1/4"
Fid size =
Total Fid length
short section
rope Dia. (inches)
“l” (inches)
“c” (inches)
T u b u l a r F i D s
A different sized splicing fid is required for each size of rope.
1/4"
5-1/2"
2-1/16"
5/16"
6-3/4"
2-1/2"
3/8"
7-3/4"
2-7/8"
7/16"
9-1/2"
3-9/16"
1/2"
11"
4-1/8"
9/16"
12-1/4"
3-5/8"
5/8"
14"
4-1/8"
3/4"
16"
4-3/4"
7/8"
19"
4-3/4"
1"
21"
5-1/4"
Fid size =
Total Fid
short Fid
rope Dia. (inches)
length (inches)
section (inches)
▲
▲
Short
Section of fid
▲
▲
▲
▲
Short Section
L