17
Hoist duty class Typical areas of application
Operation time ratings at K=0.65
Unlformly distributed
work periods
Infrequent
work periods
Max. on
time, min / hr
Max. No.
starts / hr
Max. on time from
cold start, min
Max. No.
of starts
H2
Light machine shop fabricating,
service,and maintenance; loads and
utilization randomly distributed; capacitys
infrequently handled.
7.6 (12.5%) 75 15 100
H3
General machine shop fabricating,
assembly, storage, and warehousing;
loads and utilization randomly distributed.
15 (25%) 150 30 200
H4
High volume handing in steel warehouses,
machine shops, fabricationg plants and
mills, and foundries; manual or automatic
cycling operations in heat treating
and plating; loads at or near capacity
frequently handled.
30 (50%) 300 30 300
●
ASME HST
1 Dm 1 Cm 1 Bm 1 Am 2 m 3 m 4 m 5 m
M1 M2 M3 M4 M5 M6 M7 M8
Rating of the
operating
hours
Average
operating
hours per
day (hour)
Total
operating
hours
V0.06 T0 ≤0.12 200
V0.12 T1 ≤0.25 400
V0.25 T2 ≤0.5 800
V0.5 T3 ≤1 1,600
V1 T4 ≤2 3,200
V2 T5 ≤4 6,300
V3 T6 ≤8 12,500
V4 T7 ≤16 25,000
V5 T8 >16 50,000
Condition of the
load
Rate of
loading
Rating of the operating hours
V0.06 V0.02 V0.25
V0.5 V1 V2 V3 V4 V5
T0 T1 T2 T3 T4 T5 T6 T7 T8
Average operating hours per day (hour)
≤0.12 ≤0.25 ≤0.5 ≤1 ≤2 ≤4 ≤8 ≤16
>
16
1 L1 K≤0.50 - - 1Dm 1Cm 1Bm 1Am 2m 3m 4m
2 L2 0.50<K≤0.50 - 1Dm 1Cm 1Bm 1Am 2m 3m 4m 5m
3 L3 0.63<K≤0.80 1Dm 1Cm 1Bm 1Am 2m 3m 4m 5m -
4 L4 0.80<K≤1.00 1Cm 1Bm 1Am 2m 3m 4m 5m - -
Rating code is FEM9.551
(Design rules of hoisting equipment for every series: classication rating of internal structure)
FEM
Comparison of ISO rating and FEM rating
(to be continued)
NOTE
As a general rule, use the product indoors. When installing the electric chain hoist outdoors or to the place where the hoist is
exposed to direct rain, wind and snow, shade the hoist with roof to protect it from rain, wind and snow.
■
Operational Environment
Ambient temperature : -20°C — +40°C
Gradient of rail : No gradient in travel rail (for the hoist with trolley)
Ambient humidity : 85 % or less (no condensation)
Explosion-proof construction : Not applicable to the work environment with explosive gases or explosive vapor
Non-conforming environment : A place with organic solvent or volatile powder, and a place with a plenty of powder
and dust of general substances
: A place with considerable amount of acids and salts
Product Specication and Operational Environment
Standard Specication / Operational Environment
1
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