Wednesday 27 September 2017

Cables for gyms and multifunctions: technical in-depth

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

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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