Gaspari Menotti

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PGM polishing machine  allows an incomparable finishing level thanks to the possibility to put up to 176 abrasives (22 heads, 8 swinging arms each) with lower consumptions comparing to all the other machines on the market, thanks to the special spindle moved by a motor kw 11 which allows the user to immediately save 88 kw/h and save, in a year, 200.000 kw/h!! 

PGM 2200 is the culmination of over 50 years of Gaspari Menotti’s experience in the field of processing and polishing naturalstone. this is why the pgm 2200 polishes granite with unequalled quality and simplicity since the pgm 2200 was designed and built in gaspari menotti’s tradition, to be the best

...the most economical

For you, economical means guaranteeing low management costs, unfaultable product quality and high productivity

For us, it means:
  • the highest beam speed in the industry
  • a precise and safe slab reading device
  • control of the vertical position of the micrometric spindle
  • the right working pressure of the heads at all points of the slab
  • manufacturing a reliable machine with zero maintenance costs

...the most reliable

For you, reliable means a machine which does not break down, which guarantees you will keep to your production schedule and planned delivery to clients.
For you, reliable means now and over time.

For us, reliable means:
  • Rigorous and accurate design.
  • High standards of surface treatment
  • The selection and control of each single component
  • Automatic lubrication systems
  • Distributing the electronics and simplifying the wiring layouts and number of cables.
  • Guaranteeing you on line and distance assistance via modem or internet to your machine.

...tailored to your needs

The PGM 2200 polishing machine is available in various models with up to 22 polishing heads,both for marble and granite slabs and thicker pieces.

...the easiest

For you, simple means easy to use

For us, simple means:
  • Simplicity in the machine’s management
  • high automation for everyone
  • wide range of polishing parameters
  • possibility to save the polishing parameters in preset

RELIABILITY : Automatic lubrication system

The lubrication of all components that require the programmed and split reintegration of lubricants both in terms of quantity and time intervals is managed by a fully automatic system controlled by the machine’s work programme. The grease dosage and distribution system is a progressive mono-line type. This is the only distribution system that guarantees lubrication in all the hundred points of the machine by means of end-cycle sensors.

RELIABILITY : Selection and control of each single component

The brand new PGM polishing machine uses only first quality components. Products from leading manufacturers of bearings, reducers, pneumatic and electronic components alone are used and installed on this new polisher in order to guarantee a level of quality that has never been seen before on similar machines. The use of high quality components makes for excellent dynamic performance and utmost reliability throughout the machine’s life, both in terms of performance and durability ensuring optimal production.

BENCH : A solid and compact structure

The bench is built in an electro-welded, enbloc steel structure to ensure great sturdiness. The working surface is rectified with CNC machines to achieve total planarity all over. The special conveyor belt has a multi-layer structure to achieve even movement. At the sides of the working bench two large grooves ensure the collection and elimination of the water containing the polishing residues. Special steel supports with swinging roller bearings are housed at the ends of the bench, on which the drum and idle motor are assembled, connected to the main body with bolts. A system of slides allows for the movement of the idle drum for the correct tensioning of the belt. An epicycloidal reduction gear unit whose speed is regulated by an inverter and detected with the utmost accuracy by an encoder assembled on the idle drum

THE BEAM SYSTEM : The spindle-holding beam

The spindle-holding beam forms a single unit structure built in electro-welded steel with a tubular-rectangular section made with very thick steel plates. The spindle units, made in aluminium alloy, are located at the centre of the beam to make it light yet at the same time highly stable. The two motor-reducers are located in the rear part of the beam complete with their transmission units and all on board controls: electric, pneumatic, lubrication. A system of protection guards made in fiber-glass that are easily removable cover and protect the whole system. Thanks to the lightness of the spindle units it is possible to build a machine with up to 22 spindles without intermediate supports. The whole beam system is both a compact, rigid unit and one that is lightweight that reaches such dynamic acceleration and speed that have never been achieved before.

THE BEAM SYSTEM : Beam joint resting system

The beam rests on its two ends by an exclusive hinge system. The system slides on tempered, rectified rollers in oil-baths that are well protected by a labyrinth system with protection guards made of stainless steel. This system compensates for the unavoidable strain on the beam during the various working phases, ensuring optimal sliding, with extremely reduced wear and vibrations. This means quality in the polishing work and minimum maintenance

SPINDLE GROUP : Straight to the heart of the most advanced technology

The spindle body is made of a strong aluminium alloy, with high resistance and low specific weight, about a third that of steel, inside which the chromium steel sleeve slides to allow for the vertical movement of the polishing head. The sleeve supports, on a combination of roll and spherical bearings, can resist all strain on the head, the spindle shaft has a very deeply-grooved profile for the vertical sliding and perfect rotation of the polishing head. The vertical movement is achieved by means of a couple of pneumatic actuators powered and controlled by electro-valves programmed by the PLC. Rotation is achieved by high-yield belt and pulley transmission between the electrical motor and the spindle. All internal parts are protected by labyrinths and guards to ensure maximum reliability. The spindle group is housed at the centre of the beam to ensure the maximum balance and sturdiness of all the spindle beam units.

SPINDLE GROUP : Micrometric control of the vertical position

This device makes it possible to lock the operating head at a fixed and constant position in relation to the slab, usually 10- 15 mm above it, in a stable and repetitive manner. This is achieved with the use of an oleodynamic device able to rigidly lock the head in the selected position under the impulse of a control set in the working programme. Taking advantage of the fact that the oil cannot be compressed, stable, accurate and repetitive locking can be achieved in a selected position, which is impossible to do with normal pneumatic actuators.

SPINDLE GROUP : The right pressure in all points of the slab

The use of electronic proportional regulators, instead of manual regulators, allows for a fine and very quick adjustment of the working pressure of each single head directly from the operating panel which is of the touchscreen type. This system makes it possible to create real working pressure diagrams which may be different in the different areas of the slab being processed or according to the differing hardness of the material to be processed.

SPINDLE GROUP : The spindle shaft

Compact spindle hub, water feeding hole, bronze bush


The polishing head is an important element for the quality and quantity of production. Thanks to a particular patented device to achieve the swinging of the polishing tools, internal wear (due to the cams) and noisy timings for the synchronisation of the sectors, have been eliminated. An efficient automatic system of lubrication programmable by PLC allows for the exact dosage of lubricant even in the worst working conditions and preserves the internal components of the head. A special and exclusive anti-rotation system, and at the same time of protection, made out of aluminium and chromium steel fusion, guarantees the cleaning of the etching between the head and spindle and chromium sleeve.

8 swinging arms: the evolution

PGM polishing machine allows an incomparable finishing level thanks to the possibility to put up to 176 abrasives (22 heads, 8 swinging arms each) with lower consumptions comparing to all the other machines on the market, thanks to the special spindle moved by a motor kw 11 which allows the user to immediately save 88 kw/h and save, in a year, 200.000 kw/h!!

The concept of economy has been redefined

PGM polishing machine allows an incomparable finishing level thanks to the possibility to put up to 176 abrasives (22 heads, 8 swinging arms each) with lower consumptions comparing to all the other machines on the market, thanks to the special spindle moved by a motor kw 11 which allows the user to immediately save 88 kw/h and save, in a year, 200.000 kw/h!!


A special electronic device makes it possible to seee the abrasive consumption of each single head. This is possible by the comparison, second by second, of the height between the thickness of the slab, read at the entry of the machine by an ultra-sound sensor, and the spindle continuously controlled by a potentiometer tightly connected to the same. The PLC continuously monitors the position of each single head and is able to prevent any undesirable contacts with the belt conveyor.


The new polishing machine is equipped with an automatic electronic profile reading device, that is fixed. By using a transceiver photo-cell barrier this can identify the shape of the slab without any surface contact and independently of the thickness of the same. A special rubber roll, connected to an encoder, co-ordinates the complete reading of the slab in the passage from the roller conveyor to the conveyor belt avoiding any possible errors generated by the sliding of the slab


The new polishing machine is completely wired in field bus: this means an efficient way of diagnosing any mal-functioning as well as a reduction of cabling and problems. Two field bus nets are used: one specifically for the beam, particularly fast thanks to the use of modules which communicate through an optical fibre to manage the spindle motion electro-valves and the level control potentiometers, the other specifically for all the other machine functions.

ELECTRICAL BOARD : A concentration of technology and quality

The philosophy of quality together with constant technological innovation finds its highest expression in the design of the electric control panel and the control system it contains. The suppliers of electromechanical and electronic parts are selected among the best world-wide manufacturers that guarantee both their utmost reliability and prompt availability on the market. It is amazing to see the very small number of cables and components it has inside. This is possible thanks to field bus technology and the use of special devices such as the remote control switches in field bus which, in a single component, replace thermal, fuses, amperometric reader and standard remote control switches. The use of this advanced technology means greater reliability and a really quicker and safer diagnosis of problems.

The software

For Gaspari Menotti technology has always been an instrument to make a great number of machine functions available to clients and, above all, to make sure these are easy and quick to use.. The PGM 2200’s management and control software is the essence of this philosophy. The wide range of working parameters under the direct control of the operator is impressive as is the ease with which these parameters can be adjusted and set, with quick and easy operations on a “touch screen monitor, using intuitive graphics and logic of “movement” from one function to another
Data Sheet
    PGM 2200/12 PGM 2200/14 PGM 2200/16 PGM 2200/18 PGM 2200/20 PGM 2200/22
Larghezza utile di lavoro / Useful working width (cm) 220 220 220 220 220 220
Spessore massimo lavorabile / Max working thickness (cm) 11 11 11 11 11 11
Spessore minimo lavorabile / Minimum working thickness (cm) 1 1 1 1 1 1
Numero teste operatrici / Number of working heads (N.) 12 14 16 18 20 22
Potenza testa operatrice / Working head power (kW) 11 11 11 11 11 11
Potenza traslazione ponte porta mandrini / Bridge translation power (kW) 2x5,5 2x5,5 2x7,5 2x7,5 2x7,5 2x7,5
Potenza avanzamento nastro / Conveyor belt power (kW) 2,2 2,2 3 3 3 3
Potenza spazzola pulitrice / Cleaning brush power (kW) 1,5 1,5 1,5 1,5 1,5 1,5
Potenza totale installata / Installed power (kW) 146 168 195 217 239 261
Velocità translazione trave porta mandrini / Bridge translation speed (cm/min) 0-6000 0-6000 0-6000 0-6000 0-6000 0-6000
Velocità avanzamento nastro / Conveyor belt speed (cm/min) 0-300 0-300 0-300 0-300 0-300 0-300
Fabbisogno idrico / Water consumption (l/min) 400 470 540 600 660 720
Aria necessaria / Compressed air (l/min) 480 560 640 720 800 880
Livello medio di potenza sonora normalizzata (in lavoro) / Average level of normalized sound power (dB(A))  81  81 81   81  81 81 
Peso totale macchina / Total machine weight (kg) 21.000 24.000 27.000 30.000 33.000 36.000
Lunghezza macchina / Machine Length (cm) 976 1076 1176 1276 1376 1401
Altezza macchina / Machine Heigh (cm) 290 290 290 290 290 290
Larghezza macchina / Machine Width (cm) 420 420 420 420 420 420
Container per export / Container for export (N.) 1xFlat-rack 40' 1xFlat-rack 40' 1xFlat-rack 40' 1xFlat-rack 40' 1xFlat-rack 40' 1xFlat-rack 40'