Lifting speed in [m/min] Motor type: Z = MH-Bas; cylindrical rotor Hook path in [m] 2/1; 4/1 reeving Load capacity in [t] Range 3; 5; 10 Demag rope hoist F = Foot-mounted hoist K = Low-headroom monorail hoist
U = Standard-headroom monorail hoist Z = Double-rail crab E = Electric travel trolley
1) CC code NC code
with control system. without control system
The size of the hoist is determined by the load spectrum, average operating time per working day, load capacity and reeving.
1. What are the operating conditions? 2. What is the specified safe working load?
5. Do the loads need to be lifted and lowered with great accuracy?
3. To what height must the load be lifted?
6. Is horizontal load travel necessary?
4. What is the required lifting speed?
7. How is the hoist to be controlled?
The load spectrum (in most cases estimated) can be evaluated according to the definitions below: The group is determined by the load spectrum and operating time.
Hoist units which are usually subject to very small loads and in exceptional cases only to maximum loads.
Small partial load Small dead load
Operating time 2 Medium
Average operating time per working day in hours
more than 16
Group of mechanisms to
Hoist units which are usually subject to small loads but rather often to maximum loads.
Large partial load Medium partial load Medium dead load Operating time
Hoist units which are usually subject to medium loads but frequently to maximum loads.
Group of mechanisms to FEM/ISO
Load capacity in t
Heavy dead load
Hoist units which are usually subject to maximum or almost maximum loads. Load capacity
Very heavy dead load
The average operating time per working day is estimated or calculated as follows: Operating time/ day = Operating time/ day =
2 · average hook path · no. of cycles/hour · working time/day
60 · hoist speed 2 · 3 · 20 · 8 60 · 6
= 2,66 hours
For the medium load spectrum and an average daily operating time of 2,66 hours, the table above shows group 2m. For a load capacity of 5 t and 4/1 rope reeving, the following table indicates hoist size DR-Bas 5 - 5.