Information about rope winches

Mode of application

Pulling winches are designed to pull loads on a 100 % flat surface. The pulling force is calculated from the mass of the load to be pulled multiplied by the load's rolling resistance.

Pulling winchPulling winch

A traversing winch can be used to move a load in two directions on a level. You can therefore move a carriage forwards and backwards for example.

Traversing winchTraversing winch

Hoist winches must be used if a load is to be raised and held by the cable winch. This applies to hoisting vertically and also to pulling the load along an angled track.

Pulling winchHoist winch

Capstan winches are endless winches that do not store the cable on a cable drum but allow the cable to run through "endlessly".

Capstan winchCapstan winch

Traction winches are endless winches like the capstan winches. They work on the same principle of increasing force due to winding friction.
Traction winchTraction winch


Information for safe operation 

Geometric
The cable is usually coiled in several layers around the drum of these winches. The lever arm with which the cable transmits traction to the cable drum therefore becomes larger with each cable position. As a result, the cable speed increases and the pulling force decreases with each cable layer that is wound up.

To ensure that the permitted cable deflection angle is not exceeded, the cable is usually first guided over a fixed reversing roller. This is aligned in the centre of the drum at a specified distance from the cable drum. To obtain a compact reel body and therefore an optimum and problem-free coiling pattern, a minimum load of 10% of the specified load capacity must also always be attached to the first layer.

 

multi-layer wound rope drum

Legal matters

  • Overrunning structural or required limits whose movement is generated by the cable winch must be prevented by limit switches. (Normally by spindle limit switches)
  • The cable drum and other moving parts must be inaccessible or protected against drawing in. (Normally by covers)
  • Cable winches with a lifting capacity of over 1.000 kg must be protected against an overload. (Normally by electrical overload protection in the switch cabinet)
  • The electrical controller must be able to be powered off. (Normally by a mains plug or a mains isolator)
  • Motorised cable winches with power ratings of more than 2 kW must be equipped with motor protection (usually in the form of a motor circuit breaker or temperature monitoring).
  • Always ensure, in the event of a power failure or undervoltage, that the cable winch can be electrically isolated (usually by means of an undervoltage monitor).
  • The customer must ensure that the base to which the winch is fixed is structurally stable.

Adaptation options to the standard range 


Drive type

Manually operated cable winches are operated by the operator's manual force via a crank handle. The power is therefore limited to a certain value which is mainly generated by the pulling force and the cable speed. The higher the pulling force, the lower the cable speed if the power remains the same.

Electrically-operated cables are driven by three-phase motors or alternating current motors. Three-phase motor powers of up to 30 kW are available in our standard version. Higher powers are available on request. Due to the mains-related limitations, the power is limited to 2.2 kW when using alternating current motors.

Hydraulically-operated cable winches are operated by orbital motors or radial piston motors depending on the power. We will either work with your existing hydraulic supply or we will provide a unit. In the standard version, we install brake valves for a secure hold.

Pneumatically-operated cable winches are operated by multi-disc motors or radial piston motors depending on the power. We can provide compressed air cable winches with power of up to 22 kW. Please specify your compressed air supply data. Depending on the design, we will equip the cable winches with pneumatic allyactuated spring-loaded brakes.

Cable speed

PLANETA cable winches normally have a constant cable speed. The PORTY, MC and SB PLANETA cable winches can be designed for virtually any cable speed. Thanks to appropriate motors that can operate at two speeds or thanks to freely-programmable frequency converter controllers, multiple speeds can also be achieve.

Site of operation

Do you have a height restriction, such as a maximum distance to the first deflection? In that case, we can construct the cable winch to fit as well as possible. If the winch has to be protected against wind and weather, or even against salt water, we can provide motors with higher protection classes, special thick protective coatings or complete housings.

Load type

There are four different safety classes for PLANETA cable winches. These start with the standard cable winch according to DGUV norm 54 (D8) (German employers' insurance association), which you can use to transport or lift goods. You must prevent people standing in the region of or under the load. Next, we have the BGV D8+ cable winch designs, which guarantee safety for people under a suspended load if the cable winch is electrically shut down. Cable winches in accordance with DGUV norm 17 (C1) also allow people to remain under the suspended load safely. In the highest safety classes, people may also be carried.

Two or more cable outflows

In order to be able to lift long cross beams or frames with large bases, you require several lifting points on the load to ensure that the load does not tip. We can equip our cable winches with multi-cable drums for this purpose. Please let us know the number of load points and the distance between them.

ex Logo Explosion protection class

The PORTY, MC and SB cable winches can be designed for use in locations at risk of explosion. Please inform us of the explosion protection class required. For more information, see pages 24 and 25 of this brochure.

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