wire rope electric hoist free sample

Product Detail ColorCustomisedProduct name2 ton electric chain hoistlift speed5m/minPower supply380V/50HZ/3PLifting height0.5t-10tOverload limitIncludeFeatureSmall-sizeSling TypeWire RopeCertificationISOUsageworkshop ,market etcProduct Keywordsstainless steel chain hoists,stage lifting electric chain hoist,stage electric chain hoist

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Are you looking for the best hoist solution for your factory or plant? Not sure whether a wire rope hoist or chain hoist is the right choice? We will explain all of the differences and applications to help you make the best decision.

Each hoisting system is intended for different purposes and consequently will have benefits and drawbacks in different scenarios. This article is going to take a deep dive into their applications and how you can make the best investment decisions for your workspace.

A wire rope is made up of multiple strands of wire that are coated with zinc or galvanized. The composition of the rope is quite complex with individual strands twisting around each other.

This complex and dense structure, combined with the treatment of each strand adds to the highly resistant properties of a wire rope hoist system making it ideal for use in extreme environments. The multiple strand form also helps to distribute loads better.

The system can be upgraded and made more efficient using a reeving system. This is where the wire rope travels around multiple drums with sheaves (a grooved pulley wheel) to hoist heavy items.

With reeving, heavier loads can be hoisted and moved because the hoist’s mechanical advantage is increased by spreading the load evenly across separate parts of the reeving system. The amount will depend on how many parts you have but, for example, in the case of a two-part single reeving system (2PS) the load capacity will be doubled across the two parts, however, it will consequently halve the lifting and lowering speed of your reeving system.

The use of reeving can also be important when you have a requirement to lift a load with a high level of accuracy. For example, the sheaves will maintain the linear position of a hook to hoist a machine or stack of materials in a smooth and straight vertical line reducing unnecessary force on the system thus ensuring safer and more efficient activity.

Another advantage of wire rope hoists is the increased headroom created by the design and particularly how the rope comes off the drum. This is especially true for 2, 3, and 5-ton wire rope hoists.

Chain hoists are an electric (or manual) hoisting solution that generally suits situations where the lifting requirements are not as significant such as smaller factories, work stations, and maintenance shops.

Their smaller physical size and maneuverability make them more flexible for different lightweight lifting and depositing applications. For professionals who work in various locations, this is a highly practical hoist solution because the crane can be transported more easily between sites. They can also be used to facilitate the use of a jib crane, hand-push crane, and gantry cranes.

Electric chain hoists will come as standard with vertical lift that is made possible by a simple reeving system and a dedicated chain container. (In order to achieve the same true vertical lift with a wire rope hoist, you would need to upgrade to a double reeved system.)

A wire rope hoist, however, with its dense multi-strand structure, is generally designed for loads of up to 50 tons. We at PWI Works have previously built wire rope hoists capable of lifting 50-ton loads and it’s not uncommon to see over 100-ton capacities!

It reduces the amount of load and therefore wear on the drivetrain components of each hoist system. The motors, clutches, and brakes are able to perform more efficiently because of the controlled motion of the chain and wire rope.

The assemblage of a chain hoist includes an effective reeving system where the chain passes through a single sheave. This means that the vertical load hoisting is conducted in a more accurate motion.

A wire rope hoist does not use the same mechanical method as the standard. The wire rope is instead wound around a single drum. The motion of hoisting therefore will cause some lateral movement as the wire ‘naturally’ finds its place on the drum as the hoist is operated. Reeving can be used to maximize lifting capacity and stability with the use of multiple drums with up to two lengths of wire rope fed from the drum and combined with pulleys. The only consequence is that this will reduce lifting speed because the wire has to travel a further distance.

Because chain hoists do not have as much flexibility in the way in which they are reeved and considering the material properties of a chain, the chain and parts (motor, clutch, brakes) are more likely to wear at a faster rate than a wire rope hoist system.

Commenting on the performance of both systems is again dependent on reeving. When you increase the number of pulley components in a reeving system, the speed will be drastically reduced to allow for the additional distance the rope (wire or chain) needs to travel to lift the load.

We can’t say that one system performs better than another because they have very different purposes. If you are looking for a higher-performing hoisting system in terms of lifting speed, your best option would be to implement minimal reeving.

With their higher load capacity, wire rope hoists are an invaluable part of any heavy machinery maintenance shop, casting and stamping plant, and any facility that handles heavy steel bundles.

They are also the preferred option for use in extreme environments because of their corrosion resistance (by treatment of the individual wire strands) which makes them more suitable for changeable weather and environmental conditions.

It needs to be mentioned that both systems will perform in extreme environments. However, prolonged use will take its toll and therefore the other components of the hoist, such as the electrical components, gearboxes, and motors also need to be capable of withstanding extreme conditions.

As we mentioned above, one of the biggest assets of a chain hoist system is its maneuverability. For this reason, they are best suited to a small part or component manufacturers. You will commonly find chain hoists in body shops as they are used to lift and maneuver engine blocks and other components in cars, trucks, and RVs.

The most important consideration is the duty cycle of the hoist. The duty cycle is the proportion of time when the hoist will be in operation and it is expressed as a ratio or percentage.

Imagine that your hoist will operate for one minute and then it is switched off for 49 minutes, then on for another minute and idle for another 49. This means that it is running for two minutes every 100 minutes, and therefore its duty cycle would be expressed as 2/100 or 2%.

You should also consider the maintenance intervals of the hoist, how long the hoist can be out of service, and how this will affect the operations in your factory or plant.

This factor is more important fundamentally to the type of hoist that will be best suited, and the weight will affect decisions in planning regarding future maintenance and how this will affect plant operations.

If the load is smaller (¼ - 2 tons) and the application will be using a workstation crane, then a chain hoist will likely be the best solution. If your requirements are for loads of 3 tons and up using a motorized bridge crane, you should use a wire rope hoist.

Electric chain hoists are less expensive, ranging from $2K-10K. Wire rope hoists can be anywhere between $5K-100K depending on the application and what upgrades you choose.

You should also think about the implications of adding a new system to your plant and the additional training that your staff will require. This is generally more important when switching from chain hoists to wire rope hoists, but nevertheless, even a chain hoist will require some training.

Don’t forget to think about maintenance costs which are generally far higher for wire rope hoists. Even though a wire rope hoist is more expensive, when it is properly maintained it can have a lifespan of 20+ years compared to 10 years for an electric chain hoist.

As the name suggests Electric Wire Rope Hoist utilizes Electricity to lift heavy workloads which are beyond human capacity. The Phenomenon lift loads by wrapping a cable around a grooved drum and then the load is attached to a hoist by the means of a lifting hook.

Electric Wire Rope Hoist is an invaluable asset for lifting and lowering a high amount of weight and reducing the efforts no matter what its unit is it can payback many times the investment made on it due to its efficiency for lifting purposes.

Electric Wire Rope Hoists are commonly seen at manufacturing units, large-scale factories, and construction sites. It gives workers a helping hand and makes their work hassle-free.

Electric Wire Rope Hoists shortens the Amount of work time for a certain period which takes hours and days to complete. They are simple and easy to use solution which will increase the productivity in your operation.

Electric Wire rope hoist is a fast speed lifting equipment in comparison to Electric Chain hoist. The lifting mechanism of the Electric Wire rope hoist is driven by a motor to complete the lifting action of the wire rope drum.

Electric Wire rope hoists use wire to lift which is wrapped around a grooved drum they move load slightly laterally and not precise or accurate in lifting. Although the lateral movement is negligible.

These hoists are made to carry heavy objects in a variety of conditions like heat, furnaces, and over the burners. These hoists can lift ranging from pounds to tones. But at the same time, it is required to maintain proper safety measures to ensure the safety of the Hoist, load, and the operator.

Electric Wire Rope Hoists are made using strands and wires which assures the spreading of pressure, stress, and weight on the overall length rather than being distributed on a single strand alone which decreases the chances of breaking factor.

Even if one of the strands breaks, there are chances that the lifting work will be completed without any problems. But a professional would suggest not to use the wire rope which has suffered any such issue but still the current operation can be completed irrespective of the broken strand. So always consider the rope material, wire, and strand structure as they go through more wear and tear than they are subjected to.

Electric Wire Rope hoists come with an instruction guide where you will have all the operating information. There are a few checks which are suggested to perform you put Electric Wire Rope hoist into use.

Wire Rope: – 6×37 construction which is a special flexible steel wire rope, having a safety factor of 6 for class-II and 7 for class-II duty cycle is provided on the hoist.

Rope Drum: – Main component is the rope drum which is made of sturdy seamless pipe or fabricated from steel plated and is grooved to take the full lift without over-winding.

Motor: – Motors are enclosed with half-hour rated with high starting torque, which is specially designed and built for hoist duty. The motors are provided with class-F insulation.

Limit Switch: – To avoid over winding of wire rope, limit switches are provided with each hoist, which ensures the highest and lowest position of the load hook.

Controls: – Every hoist is provided with a control panel comprising of Siemens/L&T/Schneider to make the heavy-duty, directed-on line reversing type airbrake connector, transformers, and fuses which helps in preventing an accident.

A crane is a machine for lifting and lowering a load and moving it horizontally, with the hoisting mechanism an integral part of the machine. Cranes whether fixed or mobile are driven manually or by power.

Overhead crane means a crane with a movable bridge carrying a movable or fixed hoisting mechanism and traveling on an overhead fixed runway structure.

A remote-operated crane is a crane controlled by an operator not in a pulpit or in the cab attached to the crane, by any method other than pendant or rope control.

Rated load means the maximum load for which a crane or individual hoist is designed and built by the manufacturer and shown on the equipment nameplate(s).

An emergency stop switch is a manually or automatically operated electric switch to cut off electric power independently of the regular operating controls.

A limit switch is a switch which is operated by some part or motion of a power-driven machine or equipment to alter the electric circuit associated with the machine or equipment.

Rated load marking. The rated load of the crane shall be plainly marked on each side of the crane, and if the crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block and this marking shall be clearly legible from the ground or floor.

Minimum clearance of 3 inches overhead and 2 inches laterally shall be provided and maintained between crane and obstructions in conformity with Crane Manufacturers Association of America, Inc., Specification No. 61, which is incorporated by reference as specified in §1910.6 (formerly the Electric Overhead Crane Institute, Inc).

Each independent hoisting unit of a crane shall be equipped with at least one self-setting brake, hereafter referred to as a holding brake, applied directly to the motor shaft or some part of the gear train.

Each independent hoisting unit of a crane, except worm-geared hoists, the angle of whose worm is such as to prevent the load from accelerating in the lowering direction shall, in addition to a holding brake, be equipped with control braking means to prevent overspeeding.

Holding brakes for hoist motors shall have not less than the following percentage of the full load hoisting torque at the point where the brake is applied.

Each independent hoisting unit of a crane handling hot metal and having power control braking means shall be equipped with at least two holding brakes.

Where multiple conductor cable is used with a suspended pushbutton station, the station must be supported in some satisfactory manner that will protect the electrical conductors against strain.

For floor-operated cranes, the controller or controllers if rope operated, shall automatically return to the "off" position when released by the operator.

Sheaves carrying ropes which can be momentarily unloaded shall be provided with close-fitting guards or other suitable devices to guide the rope back into the groove when the load is applied again.

The sheaves in the bottom block shall be equipped with close-fitting guards that will prevent ropes from becoming fouled when the block is lying on the ground with ropes loose.

In using hoisting ropes, the crane manufacturer"s recommendation shall be followed. The rated load divided by the number of parts of rope shall not exceed 20 percent of the nominal breaking strength of the rope.

Rope clips attached with U-bolts shall have the U-bolts on the dead or short end of the rope. Spacing and number of all types of clips shall be in accordance with the clip manufacturer"s recommendation. Clips shall be drop-forged steel in all sizes manufactured commercially. When a newly installed rope has been in operation for an hour, all nuts on the clip bolts shall be retightened.

Wherever exposed to temperatures, at which fiber cores would be damaged, rope having an independent wirerope or wire-strand core, or other temperature-damage resistant core shall be used.

Replacement rope shall be the same size, grade, and construction as the original rope furnished by the crane manufacturer, unless otherwise recommended by a wire rope manufacturer due to actual working condition requirements.

Hoist chains, including end connections, for excessive wear, twist, distorted links interfering with proper function, or stretch beyond manufacturer"s recommendations. Visual inspection daily; monthly inspection with a certification record which includes the date of inspection, the signature of the person who performed the inspection and an identifier of the chain which was inspected.

The trip setting of hoist limit switches shall be determined by tests with an empty hook traveling in increasing speeds up to the maximum speed. The actuating mechanism of the limit switch shall be located so that it will trip the switch, under all conditions, in sufficient time to prevent contact of the hook or hook block with any part of the trolley.

Running ropes. A thorough inspection of all ropes shall be made at least once a month and a certification record which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the ropes which were inspected shall be kept on file where readily available to appointed personnel. Any deterioration, resulting in appreciable loss of original strength, shall be carefully observed and determination made as to whether further use of the rope would constitute a safety hazard. Some of the conditions that could result in an appreciable loss of strength are the following:

Other ropes. All rope which has been idle for a period of a month or more due to shutdown or storage of a crane on which it is installed shall be given a thorough inspection before it is used. This inspection shall be for all types of deterioration and shall be performed by an appointed person whose approval shall be required for further use of the rope. A certification record shall be available for inspection which includes the date of inspection, the signature of the person who performed the inspection and an identifier for the rope which was inspected.

When two or more cranes are used to lift a load one qualified responsible person shall be in charge of the operation. He shall analyze the operation and instruct all personnel involved in the proper positioning, rigging of the load, and the movements to be made.

At the beginning of each operator"s shift, the upper limit switch of each hoist shall be tried out under no load. Extreme care shall be exercised; the block shall be "inched" into the limit or run in at slow speed. If the switch does not operate properly, the appointed person shall be immediately notified.