PRODUCT DESCRIPTION
12 | EN
www.schmalz.com
30.30.01.01117/06
2.2 Operating Conditions
Classification according to usage conditions:
The chain hoists and trolleys are classified in drive groups according to the following guidelines:
DIN EN 14492-2
DIN 15400 (load hook) / DIN 15405 (safety load hook)
FEM calculation rules for series lifting equipment
(chain drive, motor, full load service life)
ISO 4301-1: D (M4) = 800 h
Information regarding general overhaul
Different standard values, which must be observed during operation, apply for the drive groups.
The manufacturer guarantees the safe and long-term operation of the chain hoist provided it is used
only in accordance with the standard values applicable for its drive group.
Before using the chain hoist for the first time, the operator must assess which of the four load types
applies to the usage of the chain hoist for the duration of its life cycle and classify the chain hoist
according to its drive group. The process for doing so is as follows:
The drive group of the chain hoist can be found on the data plate.
Step 1: Determining the load collective (factor k)
The daily load collective of a chain hoist forms a comparison value for the chain hoist capacity. The
load collective can be calculated based on the percentage of the indicated maximum load of the chain
hoist and the corresponding running time percentage of the chain hoist.
Alternative 1:
Calculation based on the percentages of total running time at particular percentages of
maximum lift capacity according to the following formula:
𝑘 = √∑(
𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑎𝑔𝑒 𝑜𝑓 𝑡𝑜𝑡𝑎𝑙 𝑟𝑢𝑛𝑛𝑖𝑛𝑔 𝑡𝑖𝑚𝑒
𝑛
3
𝑥𝑃𝑒𝑟𝑐𝑒𝑛𝑡𝑎𝑔𝑒 𝑜𝑓 𝑚𝑎𝑥𝑖𝑚𝑢𝑚 𝑙𝑜𝑎𝑑
𝑛
)
𝑛
𝑖=1
3
Alternative 2:
Estimation based on four predefined cases using the following diagram:
Load type 1
– low
K<0.5
K=0.5
Load type 2
– moderate
0.5>K<0.63
K=0.63
Load type 3
– high
0.63>K<0.80
K=0.80
Load type 4
– very high
0.80>K<1.00
K=1.00
Full load only in exceptional
cases; primarily light loads
Often at full load, but generally
light loads
Frequently at full load;
generally moderate loads
Regularly at full load
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% of running time
% of running time
% of running time
% of running time
