Prowinch PWA - Load Level and Service Life

Version 1.0
15
Specications
15
2.3. Load Level and Service Life
Hoist
Duty
Class
Typical Areas of Applicaon
Operaonal Time Rangs at K = 0.65
Uniformly Distributed
Work Periods
Infrequent Work
Periods
Max. On
Time,
min/hr
Max. No.
Starts/hs
Max.
No. Time
From Cold
Start
Max. No.
of Starts
H1
Powerhouse and utilities, infrequent handling. Hoists used
primarily to install and service heavy equipment, where
loads frequently approach rated load, and where the hoist
is idle for 1- to 6-month periods between periods of oper-
ation.
7.5
(12.5%)
75 15 100
H2
Light machine shop, fabricating service, and maintenance.
Loads and utilization randomly distributed. Rated loads
infrequently handled. Total running time not more than
12.5% of the work period.
7.5
(12.5%)
75 15 100
H3
General machine shop, fabricating, assembly, storage,
and warehousing. Loads and utilization randomly distrib-
uted. Total running time not more than 25% of the work
period.
15 (25%) 150 30 200
H4
High-volume handling of heavy loads, frequently near
rated load in steel warehousing, machine and fabricating
shops, mills, and foundries, with total running time not
more than 50% of the work period.
Manual or automatic cycling operations of lighter loads
with rated loads infrequently handled such as in heat
treating and plating operations, with total running time
frequently 50% of the work period.
30 (50%) 300 30 300
H5
Bulk handling of material in combinaon with buckets, mag-
nets, or other heavy aachments. Equipment oen cab operat-
ed. Duty cycles approaching connuous operaon are fre-
quently necessary. User must specify exact details of operaon,
including weight of aachments.
60 (100%) 600 N/A N/A