To select the best wire rope for each application, one. Draka elevator offers an everexpanding product range as well as supplier integration capabilities for the elevator industry. For a 26mm wire rope to escape bend fatigue the winch drum or block sheaves over which it runs would need a minimum diameter of over 1. Steel wire ropes in elevators 092019 token fee 9,50 eur.
Today, the downsizing trend in new construction and modernization is effectively holding down costs on the front end, but this push towards smaller systems is adversely affecting wire rope. Selfcontained system green technology smoothest ride. Bekaert elevator rope wire meets the standard en102642 specifications. It defines the nominal tensile strengths of the outer and inner wires, and assigns the rope a defined minimum breaking strength.
Some of the rope services direct ltds sturdy rope a safe alternative. There has always been a need for a field lubrication that deals with the bending stresses, high groove pressures and moisture that attack elevator ropes. It is one of the largest wire rope manufacturer in the world. Module 10 final exam elevator preventive maintenance. Wire ropes are composite construction of strands of fibre or steel or both, bunched to form a core surrounded by stranded and twisted cores. A brief history of elevator wire ropes, part three elevator. To assess whether a rope is to be replaced, please refer to chapter rope. Finite element analysis was conducted as a baseline to study guided wave propagation in wire ropes and plot dispersion curves. Flexisteel elevator cable is an innovative traction member for electric machine roomless lifts mrl and lift renovation projects. This tech tip addresses many of the more frequently asked questions about rope and lubrication. The mechanical properties of the ropes in use depend on the rope construction, the load situation, nonlinearities and the lift dimensions. Meanwhile, steel cores low the elongation of elevator wire ropes under same loads compared with fiber core. Wire rope products will break if abused, misused or overused. Beam clamps are used to suspend manual and electric hoists, as anchor points, or as lifting.
It is also the only wire rope company in the world that has a totally integrated business model to convert ironore into steel wire ropes as well as build its own wire drawing and rope making machinery. Oakland elevator colorado denver connecticut north haven florida jacksonville orlando georgia atlanta elevator illinois saint charles maryland baltimore elevator massachusetts boston oklahoma moore pennsylvania harrisburg tennessee nashville elevator texas corpus christi dallas houston odessa alps wire rope corporation. End termination the treatment at the end or ends of a length of wire rope, usually made by forming an eye or. Our global team of experts can also help customize the properties to your specific requirements. Locate a service center near you the bethlehem wire rope service group is the team against which all others benchmark customer service. Due to tic coating, the traction sheaves can hus enhancing service life. For example, an 8x19 seale has 152 moving parts 8 strands, 19 wires per strand that must be work in conjunction with not only each other, but also with external forces, such as sheaves. Wire rope core wrc a wire rope usually of 6 x 7 611 x 7 6a construction. The use of elevator wire ropes rope services direct. We stock large quantities of different varieties to be available for whatever type job you may have. A brief history of elevator wire ropes, part one the humble hoisting rope occupies a unique place in the history of vertical transportation. A used groove can be too small for a new rope, thus accelerating rope wear.
However, in some highrise highspeed, most mrl and certain hydraulic applications, the use of steelreinforced natural fiber or full steel core iwrc ropes is becoming more common. Initially wrought iron wires were used, but today steel is the main material used for wire ropes. Wire to most wire rope users, 6 x 19 means 6 x 25 filler wire. Frequently asked questions about wire ropes in elevators. It is a common rope in the 6 x 19 clasvlafdwlrq 6 x 26ws warrington seale a standard 6 x 26ws design provides the best rope for a wide range of applications. Elevator ropes are discarded on account of wire breaks, wear andor diameter reduction. Lefthanded and galvanized ropes will be manufactured upon special request. Acculube automatic rope lubricatorscleaners part number description acculube 200 automatic rope lubricator, with three brushes 210 mm 8.
Steel wire ropes for traction elevators elevator world online. In the example above, each individual wire is arranged around a central wire to form a 7 wire strand. Eye or eye splice a loop, with or without a thimble, formed at the end of a wire rope. Eecos engineering, management and research staff consists of highly trained individuals who have many years of experience in the design and manufacture of hydraulic elevator equipment. Together with the other two articles in this series elevator world, may and june 2016, this brief history of elevator wire ropes serves, in many ways, as an outline of a more complex story. When an elevator hoist rope is in operation, each wire is in contact over its entire length with other wires, sheaves and drums. Wire rope installation 7 wedge socket installation 8. Service life prediction of running steel wire ropes. If there is anything in this manual that is not clear or which you.
A wire rope inspector is a person who performs inspections required for each tramway equipped with wire rope in the state of maine. The ropes 152 wire and strand components continually adjust and readjust as the. All certificates are located here as pdf files ready for downloading. Wire rope cores natural fiber is the most common core used in elevator ropes in north america. Our extensive product inventory of over 7,000 components includes compensation, traveling and hoistway cables, wireway, wire rope and accessories, tools, maintenance and. Elevator hoist rope with steel core iwrc steel core elevator hoist ropes are used where additional strength is required without increasing the diameter of the wire rope. These technical documents or parts of them may not be duplicated, distributed, made available. Compact gearless machine flexible belts allow a smaller sheave. Our elevator ropes come with a bright selfcolored finish and a lubricant designed to enhance the traction process. The quality of the lubricant in a wire rope is just as important as the quality of other rope components wire and core.
Independent wire rope core effectively increases the metallic crosssection of elevator wire ropes and reduce tensile stress in individual wires. A brief history of elevator wire ropes, part one elevator. Wire rope diameter 12 8x19s brt trc rr fs fc it is important to recognize that wire rope is always manufactured larger, never smaller, than the nominal diameter. Choosing wire ropes the subject of wire ropes is a large one and covers hundreds of industies requiring a lifetime of study. Normally, an elevator wire rope is composed of six, eight or nine strands with fc or iwrc as. Coated steel belts have a significantly smaller bending radius than wire rope. Rene karavas, regional supervisor tssa elevating and amusement devices. Standard 6 x 19 and 6 x 36 classification ropes 6 x 19 vs. Single ropes are widely used as main hoist ropes for tower cranes, truck cranes, deck cranes, and floating cranes.
Wire rope replacement criteria tech tip 2 t e c h t ip draka elevator 02 0112 2151 n. A number of operations of the crane shall be carried out at ap proximately 10 % of the normal load to stabilize the wire rope. During evaluation, corrosion, rope deformation or excessive elongation should also be taken account. Standard for elevator suspension, compensation and governor systems asme a17. Mependent wire rope iwrc this is a separate wire rope. However, any warranty, expressed or implied as to quality, performance or.
Jun 04, 2018 wire rope is a sort of link which comprises a few strands of metal wire laid or curved into a helix. On this page you can log in and then you have access to all the material certificates on steel wire ropes you have purchased from ropenhagen. Eliminating the cost of drilling and the risk of ground contamination from oil leak. Guidelines for handling, installation and maintenance of wire ropes. What would be the elevator speed when the manual lowering valve is opened. Range of high carbon wires for elevator rope applications according to en102642 or according to customer specs. Generally speaking, sheaves designed and cast in the. A simple hemp rope lies at the center of one of the bestknown elevator stories elisha graves otis demonstration of his improved safety device at. This article reports the condition monitoring of a steel wire rope from a hoisting elevator with broken wires as a result of corrosive environment and fatigue. It consists of a high tensile steel wire elevator rope covered with a thermoplastic coating.
Consult industry recommendations and asme standards before using. Operating machinery positioned above positioned above elevator elevator hoistway. Important rope terms 6 rope specifications 8 high performance ropes 16 discarding criteria 20 installation rope untwist 22 rope tension 23 rope maintenance relubrication 24 handling 26 assemblies for elevator ropes 28 rope accessories rope sockets, wire rope clips 29 rope suspensions 30 damper 32 compensation chains 34 roller guides 36. A simple hemp rope lies at the center of one of the bestknown elevator stories elisha graves otis demonstration of his improved safety device at the 1854 crystal palace in new york city. Draka elevator is the cable manufacturer and component distribution source to the vertical transportation industry. A wire rope is designated by the over all diameter, the number of strands, number of wires per strand, the cores, the type of lay and the length etc. With over 35 years of experience in the industry, we have built a global reputation for providing highquality, innovative components essential to effective elevator operation. Tck elevator wire rope tester has achieved the perfect combination of innovative technology, practicability and miniaturization. In standard practice, the nominal diameter, or 12 in our example, is the minimum diameter to. This is a short introduction to small diameter wire ropes typically used for flying scenery, display, handrailing and small yacht rigging. Any contact between the steel prongs of the fork lift. An additional benefit of the steel core is that these ropes will exhibit somewhat reduced stretch when compared with that of fiber core ropes.
The four main criteria that determine the choice of the correct wire rope are. Draka elevator usa, united states, north carolina, rocky. Grooves should have an arc of contact with the wire rope between 5 and 150 degrees. Water weights with over 25 years experience in the crane industry possess extensive knowledge of customer requirements. Although their operating properties vary, all have the same weight per foot and the same minimum breaking force, size for size. Pdf influences on lifetime of wire ropes in traction lifts. Wire strand core wsc these cores are chiefly for standing ropes guys or rigging. In general, we recommend the use of a 6 x 26ws in any application where a 6 x 25f is used. Elevator ropes and accessories for north america prysmian. Before bringing the rope into operation on the appliance, the user shall ensure that all the devices associated with the wire rope operation are set and functioning correctly. Sheave hardness varies between elevator companies and sheave design, as well as with age of the equipment. The term link is frequently utilized reciprocally with wire rope.
This is especially true of elevator ropes because of their relatively long service lives. Due to excellent rotation resistant and ease of handling, single ropes are also popular as lead lines when laying a long length of power cables. The gen2 elevator delivers superior performance in a space saving design. The quality of the steel wires used for elevator cores has a substantial impact on the service life of the rope. The 6 x 36 classification of wire ropes includes standard 6 strand, round strand ropes with 27 through 49 wires per strand. Acculube 300 automatic rope lubricator, with three brushes 300 mm 11. Detection of broken wires in elevator wire ropes with. Notwithstanding, all in all, wire rope alludes to distances across bigger than 38 inch sizes littler than this are assigned as link or ropes. It has a single wire center with six wires of the same diameter around it. Fiber synthetic or sisal, which is the weakest, strand the core is a wire strand, just like the other strands of the rope. Today, with six factories in five countries, we offer a full line of elevator wire ropes designed and manufactured to meet the requirements of the elevator industry worldwide.
Draka elevator gets quite a number of questions about wire rope lubrication. Initially, the systems were costly, but ropes and sheaves lasted forever. How often should you inspect the brushes and the commutator of a. Storage wire rope should be stored indoors, off the ground and covered to protect it from moisture, dirt, dust, sunlight, etc. It is possible to calculate, based on feyrers formula, for a set of given parameters rope design, nominal rope diame. Elevator cable tension meter quick balance dillon qb. With a pc, testing data is displayed in real time and the testing result is not affected by the speed and load of the target elevator. Galvanized wire ropes are available for special applications requiring additional levels of corrosion protection that cannot be fully accomplished through the lubrication of the wire rope. Wire rope is actually a machine with a multitude of moving parts. Wire rope tools tension measuring 19 20 diameter measuring 20 cutting 20 about gustav wolf since 1887, gustav wolf has been a wellknown name in wire ropes.
Usha martin steel wire ropes finds place in every corner of the globe and has presence in almost all application of ropes. Ced can provide you with the highest quality elevator wire rope in the industry. The design utilizes wire ropes in conjunction with two hydraulic jacks to lift the elevator at a 1. They should be tapered to permit the rope to enter and leave the groove smoothly. The increased specificity of the code was doubtless informed by the gradual accumulation of data on wire rope use during the 1930s and 1940s. Unreeling care must be taken to unroll and not laterally pull wire rope when paying it off the reel see the examples to the right. North american technical support elevator ropes and. Acculube automatic rope lubricator and cleaning kit. Kinking and dragging ropes over sharp edges must be avoided. As the rope size increases, for instance, a large number of wires can be used to achieve required fatigue resistance, and still those wires will be large enough to offer adequate resistance to abrasion. A compromise between rope life and machining frequency must be made. Wire strand core wsc strand usually of the same construction as the outer strands.
Some information for this manual was taken with permission from the installation manual. For each foot the jack rises, the elevator rises two feet. Of course the production of ropes with diameters not listed in the tables above is possible. It consists of a high tensile steel wire elevator rope covered with a. Construction the main components of wire rope are shown below. Suspension ropes, bigger in diameter than 16 mm 58 with 6 to 9 outer strands should have at least filler wire strands because of better flexibility. Generic wire rope lubrication like that used for crane wire rope is unsuitable for elevator use. Drako will of course continue to supply its customers with such solutions. The core serves as the foundation to hold the rope together. Analysis of bending fatigue in a 2inch iwrc wire rope author. Wire rope installation guide prysmian group north america. As the elevator wire ropes will be regularly lifting heavy loads, with both the weight of the elevator and the multiple passengers that it must carry, it is important that it is strong and reliable.
European and international elevator rope standards en 12385 part 5 2 also 4344 3 have coined the term rope grade to describe rope strength. Wire rope engineers design those parts in different steel grades, finishes and a variety of constructions to attain the best balance of strength, abrasion resistance, crush resistance, bending fatigue resistance and corrosion resistance for each application. Wire rope and wire rope slings elevator products chain products synthetic slings fittings and blocks hoists and winches below the hook products fall restraint cordage cargo control tools and other items useful information download and print alp industries catalog. This is clearly impractical in many applications, and unnecessary if. Elevator wire rope is specified by its diameter, construction, finish, grade, lay.