Kinocranes European Design Overhead Crane FEM Working Duty

Mar 07, 2019

Working system is related to mechanical life. When you choose crane, you should select corresponding crane FEM working system according to the real working condition, so as to make your investment more reasonable. Before you choose FEM working system, two aspects need to be considered： load type (scope of load bearing) (K) and daily average operating time (Tm)

Load type(scope of load bearing)

Light type(k≤0.5) Occasionally lifting with full load, usually lifting with light load, fixed load is low.
Middle type(0.5< k ≤0.63) Occasionally lifting with full load, usually lifting light load,fixed load is in average.
Heavy type(0.63 <k ≤0.8) Repeatedly lifting with full load, usually using average weight load, fixed load is heavy.
Extra heavy type(0.8<k<1) Usually lifting with full load, fixed load is heavy.

Daily Average working time(TM):TM means daily average working time, including load and empty load.

FEM woking duty estimated data.

Load level		Average performance time (hour)
Maintenance	K	< 0_5h	< lh	< 2h	< 4h	< 8h	< 16h
Light type	K<0.5	一	ICm	lBm	lAm	2m	3m
Middle type	0.5 < K<0.63	ICm	lBm	lAm	2m	3m	4m
Heavy type	0.63 < K<0.8	lBm	lAm	2m	3m	4m	5m
Extra heavy type	0.8 < K < 1	lAm	2m	3m	4m	5m	一

FEM working duty examination

Need to inspect the motor load and number of starts of every hour

(Lifting time + down time)

Motor load= ------------------------------------------------------------------

(Lifting time + standby time + down time +standby time

Working duty	lBm	lAm	2m	3m	4m
Motor load(ED)	25%	30%	40%	50%	60%
Numbers of starts of every hour	150	180	240	300	360
Operating time with full load of one year/250days	400	800	1600	3200	6300

FEM/ISO

FEM working duty	1Bm	1Am	2m	3m	4m
ISO working duty	M3	M4	M5	M6	M7

Crane Working Class Selection

Crane Classification	Typical Installation	Lifts per/hr.	Average Lift	Shift	Typical Workload	Key Points
Class A Standby or Infrequent Service	Power Houses Public Utilites Turbine Rooms Motor Rooms Transformer Stations	0-2	10 ft.	Single Shift Operation	Precise handling at slow speeds with idle periods between lifts Capacity loads may be handled for intial installation of equipment and for Infrequent maintenance	H1 Hoist Maintenance crane in machine house Used only occasionally
Class B Light Service	Repair Shops Light Assembly Operations Light Warehousing	2-5	10 ft.	Single Shift Operation	Loads vary from no load to occasional full rated loads	?H2 Hoist Light service requirements Slow speed
Class C Moderate Service	Machine Shops Paper Mills Machine Rooms	5- 10	15 ft.	Single Shift Operation	Average load is 50% of rated load 50% of less of the lifts are at the rated capacity	?H3 Hoist Minimum 1.15 service factor on bridge motion 5,000 L-10 bearing life
Class D Heavy Service	Heavy Machine Shops Foundries Fabricating Plants Steel Warehouses Container Yards Lumber Mills Stanadard Duty Bucket & Magnet Operations	10-20	15 ft.	1 - 2 Shift Operation	?Average loads approaching 50% are continuously handled 50% of less of the lifts are at the rated capacity	?H4 Hoist Minimum 1.3 service factor on bridge motion 10,000 L-10 bearing life Lift the maximum capacity with 30% frequency Typically faster speeds over Class C A Built-Up Hoist is typically used in this type of application and is tailored towards a specific application with a heavy duty cycle to handle demanding needs.
Class E Severe Service	Magnet Bucket Magnet/Bucket Combo Scrap Yards Cement Mills Lumber Mills Fertilizer Plans Container Handling	20+	20+ft.	24/7 Continuously	Continuous use at/or near capacity	?H4+ Hoist Minimum 1.75 service factor on bridge motion 20,000 L-10 bearing life Continuously lifts at the maximum capacity Typically faster speeds over Class C and D A Built-Up Hoist is typically used in this type of application and is tailored towards a specific application with a heavy duty cycle to handle demanding needs.

Hoist Classification			Corresponding Crane Class		Corresponding Crane Class
FEM	HMI	ISO	CMAA	DIN 15018 & SIM.	EXAMPLE
1Cm	H1	M2	CLASS A	H1/B2	Maintenace crane in machine house Used only occasionally
1Bm	H2	M3	CLASSB	H1/B2	Light duty work shop crane Single shift operation Low average loads Maximal load lifted occasionally
1Am	H3	M4	CLASSC	H2/B3	Light/Med duty work shop crane Single shift operation Medium average loads Occasionally lifting of max load
2m	H4	M5	CLASSD	H2/B3	Heavy duty crane, 2 shift operation 1 or 2 shift operation Regular medium and heavy loads
3m	H4	M6	CLASS D	H2/B3 or H3/B4	Med/heavy duty work shop crane Nominal load regularly lifted Traverse or other dead loads below the hook
4m	H4 or H5	M7	CLASS D or CLASSE	H3/B4 or H4/H6	Very heavy duty crane 2 - 3 shift operation Grab or magnet below the hook Regular heavy loads

KEY:
FEM - Federation Europeenne de la Manutention (European Federation of Material Handling)
HMI - Hoist Manufacturers Institute ISO - International Organization for Standardization CMAA - Crane Manufacturers Association of America DIN - Federation Europeenne de la Manutention (German Institute for Standardization)

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Kinocranes European Design Overhead Crane FEM Working Duty

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