Welcome to our Company Lark Engineering Co. (India)

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As its name implies, Full screen hammer mill have 80 % screening area as compare to 50 % in half screen hammer mill. This machine is an answer to many fine or coarse grinding problems that we usually face. Our Full screen hammer mill has so many other features also that make it an ultimate choice.

Quick span Locking mechanism of doors makes accessing the grinding chamber for screen changing etc.very easy.

Interlock Sieve pressing Device makes sieve changing quickly, without use of any tools and eliminates unevenness of sieve.

Direct Coupled Motor with grinder means no slipping of belts and no loss of power.

Dynamically Balanced Rotor means vibration level minimum to the Standard norms. Forward and Reverse rotation of rotor allows utilization of cutting points of hammers without wastage of time. Further hammers and hammer holding rods are heat treated for prolonged life and are static balanced to avoid vibrations.

Rotary Feeder for uniform feeding of product into the mill. For maximum safety of mill, rotary feeder is equipped with self cleaning magnet for removing metal objects etc., which can be cleaned within 10 seconds.

In most feed manufacturing facilities, the grinding operation is first or second largest energy consuming process. So an efficient machine that can grind the material to the required fineness with minimum of power, will not only cut the cost of grinding but also play significant roll in producing quality pellets by helping to improve mixing, conditioning and pelleting process .

FSHM-1015

Lark introduces model FSHM-1015, a hammer mill specially designed for small feed mills. It can run on 10 HP motor and has solved the problems of fine grinding. It has given outstanding results on millet grinding and can be used as separate unit. For normal grinding it has provision to shift to coarse grinding. It is supplied with Inlet hopper, outlet hopper, vibration dampers.

FSHM-2040

Lark introduces model FSHM-2040, a hammer mill specially designed for feed mills with 4-6 MT/hr mash. For pelleting operation it can crush 3-4 MT/hr on 40 hp with 3mm hole screen.

It can run on 20 to 40 HP motor and has same features as model-1015.

FSHM-3075

Lark introduces model FSHM-3075, a hammer mill specially designed for feed mills with 8-10 MT/hr mash. For pelleting operation it can crush 6-8 MT/hr on 60 hp with 3mm hole screen.

FSHM-50120

Lark introduces model 50-120 of patented design which is specially suitable for fine grinding in pelleting operations. It is capable of grinding 10-12 ton per hour easily on 3mm hole screen using just 100 hp only. Besides, it has other features also.
	It has unique feature of Quick Gap Adjustment between hammer tip to screen which plays a crucial role in efficiency as well as quality of grinding .We can get fine feed for pelleting as well coarse feed for finisher /parent flock with equal ease.
	Manually operated rotor break mechanism provided to stop the hammer mill quickly without wasting any time while changing of screens etc.
	It can run on 2800 rpm or 1400 rpm as per requirement of quality of grinding required.
	It is ideally suitable for 14-16 MT per hour Mash feed Plant and 10 MT per Hour Pellet Plant.

Technical Specifications

Model	Capacity Kgs/Hr. Maize Grinding			Capacity Kgs/Hr.Mixed feed Grinding			Capacity Kgs/Hr.	Power (H.P.)
	Starter 4mm	Grower 5mm	Finisher 6mm	Starter 4mm	Grower 5mm	Finisher 6mm	Millet grinding	Power (H.P.)
FSHM 1015	1800	3200	4000	2500	4000	5500	1800	10 - 15
FSHM 1525	2500	3800	4800	3200	4500	6800	2600	15 – 25
FSHM 2040	4500	6500	9000	6500	8500	11000	4500	20 - 40
FSHM 3075	6000	8500	13000	8000	10000	13000	8000	30 - 75
FSHM 50120	8500	10500	12000	12000	14000	16000	10000	50-120

OUR PATENTED QGA - TECHNOLOGY

Inventing this technology is one more feather to our cap and a total grinding solution for all types of grinding. “Quick-Gap-Adjustment” QGA, as its name implies this technology is a boon for grinding different sizes of products as fine/ Medium/ coarse by quick change of gap between hammer tip and screen, thus creating ideal parameters for optimum grinding of product.

Grinding different sizes of product (fine/ Medium/ coarse)

In poultry feed, we need different particle size of feed referred to as fine or coarse to feed a day old chicks to full age broiler/ chicken. For optimum grinding we need different parameters for fine grinding or coarse grinding.

In simple hammer mills, the required particle size is obtained by changing the hole size of screens while the other parameter of hammer mill such as tip speed of hammer mill, gap between hammer tip to screen, remain same.

In modern hammer mills, to obtain coarse/fine grinding following step are taken.


	Screen of smaller hole for fine and bigger hole for coarse feed is used.
	Speed of motor can be changed by fitting a VFD (Variable frequency drive) or dual speed motor or D.C. motor.
	Gap adjustment between hammer tip to screen is varied by changing the position of hammers on different PCD on circular plates of rotor.

Our Modifications

Our modifications relates to point III Gap Adjustment between hammer tip to screen.

In prevailing method of gap adjustment, as the no. of hammer on rotor goes on increasing with increase in size of hammer mill. Particularly on bigger hammer mills it wastes so much time to remove all the hammers from one position and fitting in other position. Sometimes, requirements are there to shift from one setting to other many times a day. So practically it is not usually possible to always change the gap by altering the position of hammer for varying quality of feed because it causes huge production loss as well as trained person are required for it. So usually only changing of screen is done to achieve the target. It result compromises on quality of feed and production loss.

If a hammer mill is set for smaller gap say 10 mm for fine grinding with 3 mm hole screen. It will not give required coarseness of feed, if 6 mm hole screen is employed until gap is increased to suit 6 mm hole. By increasing hole size of screen, uneven grinding is achieved.

Similarly if a hammer mill is set for coarse feed with say 25 mm gap with 6 mm hole screen for coarse feed, it will get jammed if operated on 3 mm hole screen or otherwise will give poor output.

In our modified design, gap adjustment can be done in two ways:

Fixture on Screen: ( a) for coarse grinding clamping is fixed inside of screen so as to provide more gaps.

b) For fine grinding clamping is fixed on outside of screen to give small gap.

Fixture on screens for coarse grinding only: In this design simple screens are used for fine grinding with no clamping/ fixtures on it. But for coarse grinding screens with inside clamping are used. To increase the gap to accommodate coarse screen, top & bottom screen holding assembly is moved either mechanically using cam shafts or pneumatically or hydraulically. Adjustment in clamping device is also provided to compensate for bigger gap screen.

Different Models in QGA series

All our full screen models as mentioned above are available with optional QGA feature.

QGA-1015, QGA-2040, QGA-3075, QGA-50120

Line Diagram with dimensions

dimensions, Weights of FSHM & QGA series

Model FSHM & QGA	Dimensions in mm																		Approx.weigth in kg. (without Motor)	Volume Seaworthy packing Cu.m.
Model FSHM & QGA	A	B	C	D	E	F	G	H	J	K	L	M	N	P	Q	R	S	T	Approx.weigth in kg. (without Motor)	Volume Seaworthy packing Cu.m.
1015	642	-	197.5	827.5	-	-	235	-	-	-	1000	750	-	-	1110	222	160	172.5	230	1.5
1525	777	-	215	1005	-	-	962	-	-	-	1000	750	-	-	1347	268	214	191	415	2.3
2040	777	1841	215	1295	-	-	962	430	220	-	1200	915	704	175	1630	420	215	307	520	4.5
3075	785	1990	-	2005	2280	412.5	1247	525	315	41	1200	915	704	175	2178	575	250	-	1000	6.4
50120	1280	2470	452	2025	2325	450	1592	525	315	41	1300	915	704	175	2218	575	250	-	1219	11.5

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