How to measure wire diameter correctly
The rope diameter shall always be checked before installation. Measure a straight part of the rope. Two parts with minimum distance of one meter shall at least be measured. By every point two measurements shall be done, with 90 degrees displacement in relation to each other. The average between the two measurements shall be according to the tolerance in the tables below.
 Right measurement |
 Wrong measurement |
Wire rope tolerances
Steel wire ropes for general applications
|
Nominal rope Ø
|
Tolerance of nominal diameter |
|
mm
|
%
|
|
2 to <4
|
0 +8
|
|
4 to <6
|
0 +7
|
|
6 to <8
|
0 +6
|
|
8 and up
|
0 +5
|
|
Nominal rope Ø |
Tolerance of nominal dia. by unloadet rope |
|
|
mm
|
Rope with strands that are |
Rope with strands that incorporate
fibre centres max. %
|
|
2 to <4
|
+7
|
-
|
|
4 to <6
|
+6
|
+8
|
|
6 to <8
|
+5
|
+7
|
|
8 and up
|
+4
|
+6
|
Steel wire for person elevators
|
Nominal rope Ø |
Tolerance for nominal diameter for ropes with fiber core/synthetic core |
Tolerance for nominal diameter for ropes with steel core
|
||||||
|
|
Unloaded
|
Loaded to 5% of min.
breaking load |
Loaded to 10% of min.
breaking load
|
Unloaded
|
Loaded to 5% of min.
breaking load
|
Loaded to 10% of min. |
||
|
mm
|
max. %
|
min. %
|
min. %
|
max. %
|
min. %
|
max. %
|
||
|
=10
|
+6
|
+1
|
0
|
+3
|
0
|
-1
|
||
|
>10
|
+5
|
+1
|
0
|
+2
|
0
|
-1
|
||
|
Nominal rope Ø
|
Difference between two measurements expressed as percentage of
nominal diameter under a load equivalent to 5% or 10% of min. breaking load |
|
|
|
Rope ovality
|
Average diameter variation
|
|
mm
|
max. %
|
max. %
|
|
<8
|
+4
|
+3
|
|
8 and up
|
+3
|
+2
|
Do you have any questions?
If you have any questions, please send us a message and we will be happy to help.
ROPETEX lubricants
Steel wire rope use and maintenance
Load tables poster
Technical description of steel wire rope
Learn more about how a steel wire is constructed, the different cord part types and much else useful about steel wire.
How do I choose the correct steel wire rope?
What to consider when choosing your wire rope
Technical description of wire rope slings
Learn about length tolerances, dimensioning and a lot more
