Information about wire ropes
PROPERTIES
The high-strength and flexible wire rope can carry double the load of a high-grade steel rod of equal diameter. In combination with various fittings the wire rope proves to be a very versatile constructional and design element. These high-strength properties remain permanent at working temperatures from -50°C to 250°C.
SAFETY
To guarantee the safety of a wire rope construction it is necessary to specify the effective strain which will be put on the wire rope and the fittings before selecting a specific rope-type and construction element. Functional reliability is ensured by a safety-factor: factor 2-3 for a static and factor >5 for a dynamic application.
WIRE FORCES
Wire force and preload force of the wire combine to make up the effective total force of the rope. Very high rope forces are generated if vertical forces affect a rope that is suspended horizontally.
Tensioning wire ropes
TENSIONING
Wire ropes are held by means of end connections. With the help of these connections the rope length can be varied and thus the rope be tensioned.
LEFT-HAND/RIGHT-HAND THREAD
Rope configurations with a right-hand/left-hand thread can be used in situations where it is not possible to tension the rope from outside. Here the process of tensing or releasing is performed by turning the entire rope assembly.
CRITERIA OF DIFFERENTIATION A2/A4
We reserve the right to replace the material specified in the respective material grade number with a comparable material. Dimensions are without obligation. Subject to change without prior notice.
SCREW LOCK
It is vital to secure the end connections to protect them from coming loose single-handedly. Several options to do this are available for passage borings:
- with chemical thread lock
- with lock washer, toothed washer or spring washers
- with counter nut
- with countered cap nut
Length of the wire ropes
ROPES READY-MADE OR FOR SELF-ASSEMBLY
Generally, we deliver wire ropes ready at length and complete with the corresponding end connections. We specialize in this and keep all components in stock. Thus, we are able to produce and deliver these ropes fast, at a competitive price and in a high quality, with guaranteed mechanical strength properties. The figure below shows how to determine the required length of the assembly. Nevertheless, exact planning is required.
The end connections for self assembly can be fastened to the rope by screwing or clamping. They enable a final adjustment on site. This may be beneficial for some applications, as it is possible to disconnect these end connections from the rope, if required.
Attention should be paid to a careful assembly of the end connections onto the wire rope so the corresponding tractive forces can be guaranteed for.
PLANNING AND IMPLEMENTATION
- Find out which rope lengths are needed. To avoid mistakes, it is a good idea to measure the required lengths on site on the finished object according to the instructions in the figure
- Order the ropes complete with the end connections of your choice – we will be happy to give advice!
We will deliver your goods within a few days. Each item will be tagged with a label indicating the length, number, diameter and, in some cases, the product name. - For the assembly, the rope should first be mounted at one end of the object. Then each rope can be pulled through any further passages before it is fixed at the other end. Now you have to ensure the exact required preload force, which can be done easily using a torque spanner (see table for maximum permissible preload forces and tightening torques).
Keep in mind that the effective rope forces (p. 74/75) have to be absorbed by the construction. The effective rope force has to match the minimum tensile strength the terminal ends can bear, in order to guarantee for an appropriate safety factor.
Finally, you have to secure the end connections against loosening to assure that the rope tension will be permanently maintained.
Rope configurator
Within just a few steps you may chose elements from our product lines FINE LINE, MID LINE, STANDARD LINE, DO IT LINE and combine them to form your desired configuration. Faultless rope combinations are guaranteed as only matching elements can be combined.
You may of course also order individual parts which do not form a part of a combination.
ASSEMBLY GROUPS
We offer a large number of pre-assembled groups for a secure mounting of wire ropes. Each assembly group is illustrated with an example for better comprehension of the application.
DETAILED INFORMATION
Further detailed information on the individual parts is available via a simple click on the data sheet icon.
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A BRUGG GROUP COMPANY
A BRUGG GROUP COMPANY
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