twin-path® slings in action - Hanes Supply, Inc

YOUR SLING AND RIGGING SPECIALISTWire RopesWIRE ROPE ABUSE continuedWire rope left on machines shut down forlong periods of time deteriorates rapidly. Topreserve the rope for future sue, it should beremoved, cleaned and thoroughly lubricated.CAUSES OF CORROSION DAMAGEPitting, erosion and surface effects of manydifferent types can all result in corrosiondamage. Because they tend to increase corrosion,the following conditions should beconsidered and noted when applicable, duringthe ordering of wire rope: acid and alkalinesolutions, gases, fumes, brine and saltair, sulphurous compounds, and high humidityand temperature. Lubricants are readilyavailable to reduce the severity of attack ofmost of these conditions.EFFECTS OF SEVERE HEATWhere wire rope is subjected to severe heat(e.g., foundry cranes) it will not give the serviceexpected because it will deteriorate morequickly.Wire ropes exposed to hot-metal handling orother extreme heat sometimes require independentwire rope cores.SHIFTING ROPES FROM ONE JOBTO ANOTHERSometimes an idle wire rope from one operationis installed on another to keep the ropein continuous service. This extremely poorpractice is an expensive "economy."Because wire rope tends to "set" to the conditionsof its particular operating job, the differingbends, abrasions and stresses of anew operation can produce premature failure.Therefore, for a maximum life and efficiency,a rope should be used only on the jobfor which it has been specified.MACHINERY OPERATIONSome operators are harder on their machinerythan others and as a result they get shorterrope life. In certain instances, enough extrawork is done to more than offset the additionalwear-and-tear on equipment and wire rope.The operation may be more efficient from theproduction standpoint as a result, but those incharge of rope purchases should be madeaware of the probable reduction in rope lifeand increased rope costs.ReVeRse benDInG Running this rope over one sheave and underanother caused fatigue breaks in wires.eXcessIVe eXPosURe to eleMents. Too much exposure combinedwith surface wear and loss of lubrication caused corrosion andpitting.too lonG In seRVIce. Repeated winding and overwinding of thisrope on a drum while it was under heavy stress caused the unusuallysevere wear shown.UnDeRsIze sHeaVe GRooVes. Sheaves were too small, causingstrands to pinch. Wires then fail in the valley between the strands.PooR WoRk PRoceDURes. Damage to strands and wires resultedfrom electric arcing.lack of knoWleDGe. Here's what occurs when a loop which hasbeen "pulled through" and tightened remains in service.HEADQUARTERS: 55 James E. Casey Drive • Buffalo, NY 14206 PHONE: 716.826.2636 FAX: 716.826.4412 www.hanessupply.com146