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Technical InformationProduct Safety: Instructions & Warnings on the use of steel wire rope3.11 Monitor the rope carefully as it is being pulled into thesystem and make sure that it is not obstructed by anypart of the structure or mechanism which may causethe rope to come free.Fig 10WARNINGFailure to monitor during this operation couldresult in injury.This entire operation should be carried out carefully andslowly under the supervision of a competent person.3.12 Take particular care and note the manufacturer’sinstructions when the rope is required to be cut.Apply secure servings on both sides of the cut mark.(See Fig. 10 for typical method of applying a servingto a multi-layer rope.)Ensure that the length of serving is at least equal to tworope diameters. (Note: Special servings are required forspiral ropes, i.e. spiral strand and locked coil.)Length of serving for locked coil winding ropes andhalf locked coil guide ropesThe length of rope to be served depends on theobject of the serving and on the size and type of therope. If the serving is to restrain the cut end of a ropeit must be longer than one intended to restrain theend of a short sample to be cut from a rope. a ropeof the stranded type exerts only a moderate burstingforce on a serving but a large locked coil rope exertsa considerable bursting force and, should the servingburst, the rope will unlay itself violently over a longlength. Thus, for the cut end of a stranded rope, twoservings each of a length at least six times the ropediameter should be used and kept in place until therope end is otherwise secured. For the cut end of alarge locked coil rope a serving or servings each alength of twenty times the rope diameter is advisable,and such servings should be backed up by aminimum of six two-bolt clamps set clear of theserved length until the rope end is otherwisesecured. Servings should be left permanently onlocked coil winding ropes so that there is one about0.6m (2ft) clear of the capel to allow properexamination of the rope at this point and anotherbetween the capel and the nearest pulley or drivingsheave in the head frame. This is to localise anyunlaying of the rope end, or of broken wires, in theevent of some incident.One serving either side of the cut is normallysufficient for preformed ropes. For non-preformedropes, multi-layer (i.e. rotation-resistant and lowrotation ropes) and parallel closed ropes (i.e. DSCropes) a minimum of two servings each side of thecut will be necessary (See Fig. 10).Arrange and position the rope in such a manner thatat the completion of the cutting operation the ropeends will remain in position, thus avoiding anybacklash or any other undesirable movement.Cut the rope with a high speed abrasive disc cutter.Other suitable mechanical or hydraulic shearingequipment may be used although not recommendedwhen a rope end is required to be welded or brazed.For serving instructions for FL and HL ropes refer toBridon.50 BRIDON Mining