Choosing
the right type of cable to use in the gym is essential to ensure the
durability of the gym equipment and the safety of the users and to
avoid annoying machine stops and intervention costs for cable
replacement.
First
of all, the principles of the European technical standard UNI EN
957-1 for the strength cable training equipment should be considered.
The standard specifies the general safety requirements for training
equipment intended for use in spaces such as sports associations,
school establishments, hotels, clubs, and gyms.
Note
that henceforth the cable will be called "rope" as it is
the most suitable technical term.
"As
far as ropes, belts and chains and fixture devices are concerned,
they must be equipped with a safety factor against breakage 6 times
higher than the maximum strength that can be developed. The diameter
of the pulleys must comply with the applicable requirements
established by the rope, belt or chain manufacturers. "
(Norm
EN957)
Metal
ropes and pulleys
"The
normal wire ropes must be made from galvanized or corrosion-resistant
cables The nominal diameter of the rope (d) and the radius of the
groove (r) of the pulley must be connected as follows: groove radius,
r, must be between:”
d/2
+ 10% is the optimal value. For this reason, it is a mistake to
install ropes of the diameter bigger than the groove radius!
Cable/rope
specifications
The
ideal cable specifications are 3.2 - 3.3mm - with a breakage load of
at least 600 kg. To increase the silence of the tool and reduce the
damage to the pulleys, it is recommended to use a coated cable,
preferably nylon. Some rope manufacturers use low quality nylon or
other materials which have a short life span.
The
use of a diameter of 3.2 to 3.3 also allows complying with the
technical regulations on the use of steel cables, which establishes
the relationship between the diameter of the pulleys and the cable.
For this purpose, a ratio of not less than 20 times the diameter of
the rope and 250 times the diameter of the primary wire is
recommended in such a way as to ensure maximum use and durability.
Parts
for Treadmill, in collaboration with a leading Italian cable
manufacturer, is able to offer a high quality gym cable with the
following specifications:
-
Steel cable diameter: 3.25mm
-
Type: 133 galvanized wire in focus
-
Breaking load: 700 kg
-
Nylon black PA12 lining in diameter 4.8mm
The
cable can be supplied:
-
Loose,
-
Ready to be assembled, in practical, ready-to-carry spare kits,
-
Ready to fit, custom-made.
Buy
the following cable for the gym via this link
http://www.partsfortreadmill.com/index.php/commercial-equipment/other-parts/
Please
note that the use of non-covered gym cables is not recommended
because:
-
the equipment would noisy,
-
the pulleys may deteriorate,
-
The relationship between wire rope and wire ropes provided by
applicable regulations would not respected.
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