HomeProductsHoists Electric Wire Rope GH HIGH CAPACITY HOISTS

ProductsElectric Wire Rope

High Capacity Hoists

1   LIFTING MOTOR
    The hoist has a cylindrical short circuit motor with an incorporated electromagnetic brake.

The motor and brake have been designed for continuos service with high duty factors and cycles.

The brakes are electromagnetic disc, with asbestos free flat faced linings. They offer great reliability and automatic braking in the event of power failure. The friction linings are long lasting and the brake is easy to regulate.

Protection IP-55 to DIN 40050.

The standard version motor has the option of one or two speeds. The second speed has a relation of 1/6. Other relations 1/2, 1/3, 1/4 are available by customer request. Also upon customer request, we can supply inverter control or slip-ring motors.
     
2   GEARBOX
    Robust and compact, situated on the exterior, allowing ease of access.
The helical teeth in all the gears are cut with great precision, in cemented steel, assuring silent running, great reliabilty and long life.
The drive from the motor to the gearbox is direct, avoiding coupling devices which have a tendancy to fail.
All of the gears are lubricated by an oil bath in the interior of a closed casing, machining of the gear locations is made by high precision machine tools.
     
3   DRUM & ROPE GUIDE
    The drum is designed end manufactured according to FEM 966 standard.
Constructed from a seamless steel tube with grooves machined according to DIN 15061. The groove is machined dependent on the wire rope exits i.e.1 or 2 exits.

The drum is fitted to the hoist frame using high quality, self lubricating. comercial bearings. The drive from the gearbox to the drum is via a direct splined shaft.

The rope guide is manufactured from GGG70 nodular cast iron with self lubricating graphite, which also gives particular resistance to wear.
The rope guide is formed by two pieces, which can easily be assembled without special tools.
     
4   OVERLOAD LIMIT DEVICE
    All of our hoists are fitted with an electro mechanical load cell as standard (electronic control).
This load cell consists mainly of 2 parts:
- A electronic cell pin
- Load cell unit (to be installed in the electric panel).
    SECURITY LIMIT SWITCH
    All of our hoists are fitted with a security limit switch in lifting, preventing a possible failure of the main limit switch.
     
5   LIMIT SWITCH
    Is located in the drum axle. It limits hook movement in the up and down motions.
     
6   TRAVELLING GEAREDMOTORS
    Are specially designed for crane application. Low torque high inertia drives, provide gradual acceleration and smooth deceleration without excessive swing.
The drive to the wheel is via a direct splined shaft.
     
7   PUSH BUTTON PENDANT
    Is manufactured from high impact polypropylene and provides double insulation. The various motions are controlled by pushbuttons which are colour coded as well as being indentified by internationally recognised symbols. Low dead weight and ergonomically styled housing reduces operator's fatigue.
     
8   WHEELS
    Dependant on the hoist model, the wheel material can be GG 60 for monorail hoists and GGG 70 (nodular cast iron with graphite structure) for birrail crabs. As shown, drive is via a direct splined axle.
     
9   ELECTRICAL CABINET
    A metallic box located on the hoist frame, allowing easy access to the electrical control components.
     
10   BOTTOM HOOK BLOCK
    The sheaves are designed according to FEM 9661. The machining of the groove is made according to DIN 15061. The cross pin and nut are machined according to DIN 15412 & 15413.
The hooks are selected according to DIN 154000 and machined to DIN 15401 & 15402, depending on whether they are single or double.
 
  DUTY CLASS DETERMINATION FOR HOISTS, ACCORDING TO EUROPEAN MECHANICAL HANDLING FEDERATION
According to FEM classification, two fundamental criteria must be taken into account: the type of duty, and the time of operation (according to average daily operating time for the hoisting movement of the equipment).
  OPERATIONAL TIME
Criteria to obtain the average operating time in hours per day (tm).

2
X
average hook travel (m)
X
cycles per hour
X
number of working hours per day

60 x lifting speed (m/min)
  HOIST PERFORMANCE RATING

Service Classification

Mean Effective Loads

Average Operating Time tmA Day In Hrs

1 Light



(k ≤ 0.50)
Load may vary from no load to occasional full rated loads. This service covers hoists used in repair shops, light fabricating industries, service and maintenance work, etc…

≤ 2

2-4

4-8

8-16

2 Standard



(0:50 < k ≤ 0.63)
Loads and utilization are randomly distributed with capacity loads are frequently handled. This service covers the hoists used in generat machine shops, fabricating and assembly industries, etc…

≤ 1

1-2

2-4

4-8

3 Heavy



(0.63 < k ≤ 0.80)
In the type of service, loads approaching 50 percent or the rated capacity will be handled constantly. This service covers the hoists which may be used in heavy machine shops, foundries, fabricating plants steel warehouses, etc…

≤ 0,5

0,5-1

1-2

2-4

4 Severe



(0.80 < k ≤ 1)
In this type of service requires hoists capable of handling loads approaching a rated capacity throughout its life. Application may include bulk handling of material with magnets. Buckets, or other heavy attachments.

≤ 0,25

0,25-0,5

0,5-1

1-2

Hoists Class

M3

M4

M5

M6

Duty class to F.E.M. standards
Corresponding to I.S.O. standards

Average daily operating time in hours

0,5

≤ 1

≤ 2

≤ 4

≤ 8

≤ 16

Class of duty

V0,25

T2

V0,5

T3

V1

T4

V2

T5

V3

T6

V4

T7

type of service

1

L1

Light

 

 

1Bm

M3

1Am

M4

2m

M5

3m

M6

2

L2

Medium

 

1Bm

M3

1Am

M4

2m

M5

3m

M6

 

3

L3

Heavy

1Bm

M3

1Am

M4

2m

M5

3m

M6

 

 

4

L4

Very heavy

1Am

M4

2m

M5

3m

M6

 

 

 

 

GROUP

 1Bm

M3

1Am

 M4

2m

 M5

  3m

M6

Duty factor

25%

30%

40%

50%

No of starts per hour

150

180

240

300

 
 
 

REFERENCE EXPLANATION FOR STANDARD
GH ELECTRIC WIRE ROPE HOISTS

GH E   03 (*) 21 04 H1
      03      
        LIFTING HEIGHT

 

  H1
H2
H3
- See
Characteristic
Chart
H1        
          04

MAIN LIFTING SPEED

        21 NUMBER OF FALLS : 2/1
                                       4/1
      R

TYPE OF HOIST

 

F: Foot mounted
R: Low headroom
B: Birrail crab

     

LIFTING CAPACITY

   
   

MIDEL OF HOIST

E - See
Characteristic
Chart
F -
G -
  E            
GH

WIRE ROPE HOIST



 

PRACTICAL EXAMPLE FOR SELECTION OF A HOIST

-Capacity: 10,000 kgs
-Lifting height :6metres
-Average hook travel: Estimated 4metres
-Lifting speed: 5 m/min
-Number of cycles per hour estimated: 12cycles
-Number of working hours per day: 8hours
-Duty factor. Standard
 

Consulting the classifaction chart we arrive to the conclusion that the group is 2 m (M5).

 


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