double disc grinder, flat lapping machines, twin head boring machine, gaging & sorting, ball & roller, surface grinders, special purpose machine, india">

Our Product Range :

Flat Lapping Machine
Double Disk Grinding Machine
Gauging & Sorting Machine
Roll Forming Machine
Die Casting Machine
Steel Grinding Machine
Ball Flashing Machine
Surface Grinder
Special Purpose Machine
Blade Grinding Machine
Wire Forming Machine
Cold Heading Machine
Spool Winding Machine
Milling Special Purpose Machine
Rough Grinding Machine
Radius Grinding Machine
Conveyor Unit
Steel Ball Plant

PRINCIPLE OF OPERATION

Double Disc Grinders have been developed to Grind, two parallel flat surface, with the help of two grinding wheel faces, opposed to each other. The workpiece is advanced between the wheels, by various methods, either free floating or clamped, depending on the shapes, sizes, quantities as well as stock removals required.

ADVANTAGES COMPARED TO CONVENTIONAL, FLAT SURFACE GRINDERS

	High Production rate
	High Parallelism
	Heavy stock removals
	Close tolerances
	Better surface finish
	Easy accessibility
	Low down time
	Low operating costs
	Facilitates easy automation
	Suitable for ferrous & non ferrous materials
	This components can be ground without damaging them
	Gradual stock removal throughout the work path across the grinding wheels, permits heavy stock removal, in a single pass

INDICATIVE LIST OF COMPONENTS THAT CAN BE GROUND :

	Alnico magnets			Flat ground steel or metal bars
	Blanking Dies			Ferrite magnets
	Bearing Rings/Rollers/Needles			Hammers
	Brake Linings			HSS Toolbits
	Bricks			Hard Disc Drive components
	Carbide Tips/inserts			Hand tools – pliers, spanners
	Castings			Keys
	Ceramic Seals			Machine knives
	Connecting rods			Piston rings
	Circlips			Propeller shafts forks
	Circular segmented saws			Piston pins
	Circular Knives			Pump components/valves
	Clutch plates			Press toll dies
	Carbon brushes			Striker forks
	Compressor valves			Spring ends
	Crank cases			Segmented grinding blocks
	Ceramic seals			Screw driver ends
	Cylinder blocks			Thrust washers
	Engine valves			Universal joint spiders
	Engineers’ Files			Valve plates

CONSTRUCTIONAL FEATURES OF THE BASIC MACHINE :

BASE Welded and stress relieved silicon steel base with cross ribbings to provide a balanced compensation for thermal expansions. Rigid construction to absorb vibrations. The base is precision machine in a single setting to adhieve necessary accuracies.
SLIDE WAYS Axially sliding wheel heads, glide on V-shaped needle cages Linear Guide Systems, with highly accurate feeding of wheel heads, without any stick and slip.
SPINDLES & HOUSING SPINDLE SHAFTS Heat treated for toughness, dynamically balanced and ground spindle shafts, ensure distortion – free operations, over prolonged usage. These hollow spindle shafts have a rotary joint to allow coolant flow to the entre of grinding wheels, for efficient cooling of wheels and work pieces. SPINDLE HOUSINGS Shafts are housed in a robust steel housing and mounted on pre-loaded high precision angular contact ball bearings which are lubricated for life. SPINDLE SWIVEL Both, vertically and horizontically adjustable spindle bushings allow the spindles to be swiveled according to need. SPINDLE FEED Rigid, ground and nitrided lead screws driven by a worm wheel, ensure rapid and precise micro displacements of the spindles. These are operated by variable speed drive motors or manually.
DRESSING DEVICE Rigidly mounted on precision ground mating surfaces, the dresser is coupled to a variable speed reversible motor and limit switches, which provides a rigid-arm motion for chatter- free dressing of individual, or both wheels, simultaneously.
SAFETY GUARD A robust compartment enclosing the grinding wheels, guards the machine and the operator against the unlikely event of wheel breakage or disengagement. FLANGES Spindles are provided with precision flanges to accommodate nut-inserted grinding wheels.

COOLING & FILTRATION SYSTEMS
An adequate capacity coolant tank and pump, feed the hollow spindles as well as the hose assembly, which forces coolant directly between the wheels.

Outlets of these systems empty back into the tank, which houses the sedimentation system comprising of various levels, baffles and meshes, to effectively cool and filter the coolant. Special filtering systems are offered as an option.

WORK FEEDERS THROUGH-FEED Work-pieces are fed between two guide rails, one on top of the other, by means of a belt, chain or roller system. The workpiece path between the guide rails, is a straight line.
ROTARY-FEED Work-pieces are fed between the grinding wheels, on a rotating carrier, and they trace an arc between the wheels. The carrier supports and guides the pieces, within the grinding zone. The carrier is driven by a variable speed drive motor. This give the second highest rate of output.
RECIPROCATING/OSCILLATING FEED Work-pieces are supported and guided in an arm-like carrier, which either reciprocates, or oscillates between the grinding wheels. Ensures very close, dimensional tolerances and is particularly suited, where relative size, within the work-piece needs to be maintained. Also suited for large and odd shaped work-pieces. This gives the lowest rate of output.

KINEMATIC DESIGN

Close grinding tolerances are obtained by minimizing the deflection created due to heavy grinding forces. A special design resolves these forces along the axis of the spindles. One of these special design features is to locate the centre of the wheel-head slides, and the spindles’ axis at the same level.

LOW CENTRE OF GRAVITY

Care is taken to keep the centre of gravity of the machines, at the lowest level, making the machine extremely stable. It reduces vibrations and increases rigidity.

CONTROL PANEL

Dust-free, stand alone control panels house power and control systems with indicators, meters, DRO’s, switches, variable speed drives etc. The cables leading to the machine are carried in an overhead conduit, thereby ensuring no hindrance around the machine.

OPTIONAL FEATURES

The following optional features are offered on request or need:

	Wheel wear indication
	Wheel wear compensation
	Pre process/post process measurement of work pieces
	Electronic variable speed drives to vary the peripheral speeds of one or both the wheels, work-piece feeder and dressing unit.
	Digital readout (DRO) for micro feeding of spindles naccuracies of 1, 5, or 10 microns
	Hydraulic wheel dressing
	Hydraulic safety guard lifter
	Magnetic separator and 5 micron filter element system
	Automatic loading and unloading devices

FILTRATION SYSTEM & MAGNETIC SEPARATOR	NUT INSEATED GRINDING WHEELS	FILTRATION SYSTEM & MAGNETIC SEPARATOR

TECHNICAL SPECIFICATIONS

Model	Grinding Wheel Dia mm	Power Per Spindle kw	Spindle Stroke mm	Weight Approx kg	Grinding Range
Model	Grinding Wheel Dia mm	Power Per Spindle kw	Spindle Stroke mm	Weight Approx kg	Thickness mm	Dia / L mm
DDG-300 DDG-300 HD	300 12	7 12	70 12	2000 2500	0.8 - 20 2500	5 - 25 5 - 40
DDG-400 DDG-400 HD	400 12	10 15	100 12	3000 3750	1 - 50 2500	7 - 50 7 - 75
DDG-500 DDG-500 HD	500 12	15 25	150 12	4000 5000	1 - 75 2500	10 - 100 10 - 125
DDG-700 DDG-700 HD	700 12	25 40	175 12	6000 8500	2 - 150 2500	15 - 140 15 - 200
DDG-900 DDG-900 HD	900 12	40 50	200 12	8000 10000	5 - 200 2500	20 - 200 20 - 300

Note : Above Specifications are subject to change due to constant improvements

HOW AMOLIK PRECISION MACHINES’ DOUBLE DISC GRINDER IS DIFFERENT?
To answer this all important question, one must delve deeper into the history of the promoters. They were the first in India, to design and develop these machines indigenously, in 1982. Since then, they have been continuously engaged in carrying out grinding operations on this machine, for various vendors of highly reputed OEM’s, such as Maruti, Telco, Mahindras, Godrej, Bajaj Auto, Tandon Corporation etc. as well as a host of other applications, numbering over 200 different components. Some of them are shown on page 2 of this brochure.
	This has resulted in acquiring a vast and enriching experience of grinding a widest possible range of components, from spring steel to bearing steel, copper to aluminium to brass, stainless steel, ceramics, carbon, alnico & ferrites. All of them ground successfully, in large quantities since 1982. The experience has provided the promoters with deep insight into the grinding processes, to solve all kinds of problems, and offer solutions for the best possible outputs for all applications. THIS RICH & VARIED EXPERIENCE HAS GONE INTO THE DESIGNING OF THESE MACHINES, which is an advantage that can hardly be matched by any manufacturer of these machines, in the world.

Amolik Precision Machines
50, Bindal Industrial Estate, Lathia Rubber Lane, Saki-Naka, Andheri (E), Mumbai-400 072. India .
< Tel. : 91-22-28516201 / 91-22-67237800> < Fax : 91-22-67237804 >
e-mail : amolikmachines@gmail.com / amolik@vsnl.com

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