wire rope drum capacity calculator brands

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With nearly 4,000 employees worldwide, WireCo WorldGroup is a great place for you to build a rewarding career. Our professionals enjoy the opportunities of a global manufacturing and distribution leader as well as a culture of open communication, professional growth, and friendly camaraderie that fosters innovation and problem solving.

A handy tool for finding a cable drum that suits your needs - just enter your cable diameter and required length and it will return a list of matching cable drums.

All figures given are based upon a theoretical ‘tight pack’. It is recommended that an allowance of up to 30% be made to accommodate loose winding. A lower percentage could be used if the crew are known to always wind the drums neatly!

The combined weight of cable and drum is highlighted in orange when the weight exceeds 16kg. At this weight a user may need to make a risk assessment with respect to moving and/or carrying such without assistance.

† Drums with CTS suffix have an open hub "Cable Tail Support" on their flange. This would accommodate a further couple of metre"s of cable to allow the

‡Drums with CTF suffix have cable tail supports plus an additional flange, forming an 80mm wide extra section on the side of the drum to protect the tail. Calculated capacities are shown including and excluding the extra section.

Press "Calculate" button to calculate your total drum capacity, total working drum capacity, recommended working capacity, D/d ratio, minimum distance to lead sheave and maximum distance to lead sheave.

The most unpredictable and non-linear of all these properties is axial tension. You can take a single length of wire 100m long from a drum of exactly the same specification from all the manufacturers of steelcord and cut them all up into 1m lengths. When you test them all, you will find that the axial properties of every piece will be different from every other piece. The variation can be as much as 35%.

a) The formula for E is for the bending plane (normal to the axis of the wire), it does not apply to the tensile modulus used for axial or torsional calculations (see explanation below)

b) The formula used in the calculator for bending stiffness has been established over many years of testing and applies to the cord at (or close to) 50% breaking strain

Whilst the above may not be much comfort, I can recommend a rule of thumb for his calculation, which appears to work at relatively low tensions (note: E for wire rope increases with tension), i.e. less than 50% breaking load:

It has been my experience that EA for most wire ropes (not OTR as this will be noticeably less) will be about 10% that expected for a solid piece of the filament wire material the same diameter of the wire rope. But the above calculation is more accurate. However, your customer’s cable configuration has only one strand and very large filament diameters, so I would expect his EA value to be nearer to 25% than 10%

Moreover, I must admit I have never studied the behaviour of Titanium in wire rope. It has a much lower tensile modulus that steel but if the filaments are kept within their elastic deformation range the calculations should work reasonably well. My only word of caution is that under significant compression (e.g. between two adjacent filaments) the coefficient of friction will be different, resulting in [slightly] higher EI values. I suggest that these should be increased by 5% for titanium over those predicted in the wire rope calculator.

All of that said, your customer has quite rightly pointed out that the technical help web page for this calculator does not make this sufficiently clear.

Hoist cars shall be suspended by steel wire ropes attached to the car frame or passing around sheaves attached to the car frame specified in Section 1604.16.

(1) Only steel wire ropes having the commercial classification "elevator wire rope," or specifications recommended by wire rope manufacturers for hoist use, shall be used for the suspension of hoist cars or for the suspension of counterweights.

A new tag shall be installed at each rope renewal. The material and marking of the rope data tag shall conform to the requirements of Section 1604.21(d), except that the height of the letters and figures shall be not less than 1/16-inch.

The factors of safety of the suspension wire ropes shall be not less than shown in Table 5. Figure 5 gives the minimum factors of safety for intermediate rope speeds. The factor of safety shall be based on the actual rope speed corresponding to the rated speed of the car. The factor of safety shall be calculated by the following formula:S x N

NOTE: In the case of multiple roping, the number of runs of rope (N) under the load will be: twice the number of ropes used, for 2:1 roping; three times the number of ropes used, for 3:1 roping, etc.Table 5

Car suspension ropes of winding-drum machines shall have the ends of the rope secured to the drum or drum flange by means of clamps or tapered sockets or by other means approved by the enforcing authorities.

Wire suspension ropes of drum type machines shall have not less than three wraps of the rope on the drum when the car is resting on the fully compressed buffers.

Hoisting and counterweight wire ropes shall be attached to cars and counterweights by means of zinc-coated or galvanized drop forged fist grips or equal and wire rope thimbles, or by approved special fastening devices. When fist grips are used, the minimum number, spacing, and tightening torque shall be in accordance with the instructions of the grip manufacturer. Grips shall be periodically checked and retightened to the recommended torque.

When extra wire rope is carried on top of the frame of the hoisting platform, a drum and clamp tie down or equivalent type anchor device, which will not damage or deform the wire rope, shall be used.

Babbitted rope sockets shall be prohibited except on permanent passenger or freight elevators which are temporarily being used as construction personnel hoists.

(1) A representative of the user of the personnel hoist shall be appointed, and this representative shall keep written records of the rope condition on file at the work site.

(4) Examination of traction machine ropes and counterweight ropes of drum type hoists should preferably start with the car located at the top of the hoistway and should be made from the top of the car, with the ropes examined on the counterweight side.

(6) Where a traction or drum machine is located below, the portions of the ropes leading from the driving machine drum or sheave and from the counterweight to the overhead sheaves can be examined from the top of the car as it descends, except for a small portion which must be examined from the pit.

(7) The rope should be marked with chalk to indicate location of unexamined sections which must be inspected from other locations such as the pit or overhead machinery space.

(8) Sheaves, guards, guides, drums, flanges, and other surfaces contacted by wire rope during operation should be examined at the time of inspection. Any condition harmful to the rope shall be corrected.

If one wire rope of a set requires replacement, the entire set of ropes shall be replaced. Wire rope shall be removed or replaced immediately if it has one or more of the following defects:

(3) Six randomly distributed broken wires in one rope lay or three broken wires in one strand in one rope lay. (A rope lay is the length along the rope in which one strand makes a complete revolution around the rope.)

(4) Development of broken wires in the vicinity of attachments. If this condition is localized in an operating rope and the section in question can be eliminated by making a new attachment, this may be done rather than replacing the entire rope.

Governor ropes shall be replaced on the same basis as hoisting ropes. (These ropes are lightly loaded and may show little or no wear. Inspectors should check for fatigued wires in strand valleys by bending over a small radius.)