Travertine Giant Disc Bridge Saw Machine in Italy

Cutting centres and Block cutters
Block cutters for granite and marble
NT2 32S - NT2 50S - NT2 60S
Block cutters with double bridge for simultaneous and independent horizontal and vertical cutting. The machine versions available are with 32, 50 or 60 disks, for granite and marble, same general features. All machines can be equipped with automatic unloaders, aerial front or side type.

Cutting systems TBV/1300-1600 30 G
The machine allows to produce strips from blocks of granite. Its supporting structure is made of electro-welded normalized steel to guarantee the vibrations absorption. The main beam is made of electro-welded normalized steel, stiffened to tolerate high pressure load. The structures are painted with a special anticorrosive treatment and are grinded for the perfect alignment of the movement parts. The trolley translation on beam is through lateral containment wheels in oil bath with low coefficient of friction. The remaining movement parts are on grinded precision guides. All the movement parts are operated by PLC and graphic terminal installed on the panel. The disc fall on the columns is through self-bearing screws device. The machine is supplied with the horizontal disc fixed on the trolley carrying discs. The switch board is made of sheet steel, thickness 15/10 mm, painted with RAL 7032 paint, IP55 protection level, equipped with double programme of cut. The supplying unit is composed by a magnetothermic switch with shutter locking to avoid the opening of the switch board with tension.
Fittings:
- spacer flanges for various thickness of cut
(one set is included in the supply)
- stock shaft carrying discs

GTM 1600 - Block cutters for Marble
This machine is designed for cutting marble blocks into strips by means of a series of one to five vertical discs and one horizontal disc.
Machine specifications:
The machine is composed of two vertical columns joined by a very sturdy support beam so as to ensure the stability of the structure.
The movement of the bridge up and down the columns is by means of two carriages with bronze sliders which run along two ground and rectified channels. These channels are made in the columns and are covered by a special wear-resistant tempered steel belt which guarantees the machine’s accuracy over time.
The main bridge which runs along the columns is made up of a special steel beam with a very thick closed section which houses special roller runners. These work in an oil bath and have airtight seals. Cutting accuracy is guaranteed thanks to the way in which the runners are connected to the columns.
Both cutting and the movement of the block carriage are programmed and controlled by a PLC which ensures maximum accuracy throughout the machine run.
The block carriage is a sturdy steel structure which moves on special double steel wheels assembled on roller bearings.
The wheels are flat/prismatic for their accurate movement under the machine along flat/prismatic rails and bars for their movement outside the cutting area.
The carriage is powered by a self-braking motor with a gear reduction unit which caters for the micrometric movements in the cutting area and other movements for the loading and unloading of the blocks.
The accuracy of the carriage movements is guaranteed by a special encoder which is an integral part of the rails and is connected to the mobile carriage by means of a steel cable. The dimensions of the block carriage are 330 cm (length of the block) by 230 cm (width of the block).

Block-cutting machine-LT 1204
The block cutting machine LT 1204 with four columns is built for the processing of marble blocks from which one can obtain strips in various sizes and thicknesses for the production of marble tiles for floors and walls, steps, jambs and other products for the building industry.
The machine is composed by four carrying columns made solid by four steel cross beams.

AUTOMATIC BLOCK CUTTER WITH 2 COLUMNS
FOR MAXIMUM BLADE SIZE 1600
Machine able to transform marble blocks into semimachined strips having a maximum width of 610 mm and a thickness up to 90 mm.It is characterised by its sturdiness and high productivity.
The main structure consists of two columns and a bridge on which the blade head slide skids; it is big sized and is made of highly resistant cast iron for maximum stability and duration. Protections all made of stainless steel for a long-lasting life. The surface protection cycle of the machine executes an initial sandblasting and washing of the castings and following application of three layers of paint.

AUTOMATIC BRIDGE BLOCK CUTTING MACHINE FOR MARBLE TYPE
“GP 800”
To get stripes with max height of 40 cms. directly from the marble block.
BENCH AND UNDERBENCH GROUP
bench entirely made in seasoned cast-iron, reinforced and accurately worked. Its dimensions complete with side brackets are 3,50 x 2,00 mts. To the bench are applied the prismatic and flat
wheels which support heavy loads. The wheels slide on special steel guides accurately worked and with very high resistence. The bench is complete with attachment fot the hydraulic cylinder
and the stroke-end stpos.
COLUMNS AND BRIDGE GROUP
Two columns entirely made in cast-iron, are connected at the upper side by a beam and from a very stout frame. The motor which controls the vertical bridge movement is placed on the
beam. The bridge, in cast-iron, is connected to the columns by means of prismatic and rectified guides and is provided with register gibs. Two independent slides are applied on the bridge: the first holds the spindle group of the horizontal disk, the second holds the spindle for the the vertical disks. The automatisms for the slide control are placed on the ends of the bridge.All
the slides are motorized, run on prismatic guides and are equipped with register gibs. All the working motions are supplied with suitable end-strokes which protect the machine from eventual operation mistakes.
SPINDLE GROUP
The two spindles are independent and can be moved both singulary for the manual adjustment and contemporaneusly during cutting operation. The motor of the diamond disks are placed in the spindle groups, 150 HP motorwith 6 poles for the vertical disks and 30 HP motor for the horizontal disk.
HYDRAULIC PLANT FOR BENCH TRASLATION
It is made up of a complete hydraulic central unit with 5,5 HP motor. The plant allow the bench movement at an adjustable speed up to a max of 9 mts./minute ahead and max 17 mts./minute
return.
ELECTRIC PLANT
The electrical plant is complete with all the necessary equipment for the control and the protection of each single motor.
Operation procedure:
After having equipped the machine with suitable vertical and horizontal disks; the various processing data are preset on the control board - that is with of the massive or thin strips and
height. Start the bench wich takes the block to the cutting area and adjust the cutting speed depending on the type of material to be sawn. When cutting is finished the bench stops and the operator unloads the peace sawn. If the machine is provided with automatic unloader, after the operator calls the unloader to the loading position, the bench goes back to the initial position and unloads the piece sawn. “GP 800” is avery stout and stable machine which gives stripes with extremely low dimensional tolerances that facilitate the subsequent operations to be done (such as grinding and polishing).
TECHNICAL DATA
- n° 1 Motor HP 150 for vertical disks holding spindle.
- n° 1 Motor HP 30 for horizontal disk holding spindle.

Large-sized electronic bridge sawing machine for cutting stone material.
Very strong and stiff iron casting structure with double beam, mechanically worked by using high quality and precision systems.
Features
THE UNIQUE FEATURES OF COMANDULLI P.B.N.E. 350 MACHINE
Spindle sliding on an assembly of iron casting guides and special frictionless pads in oil bath.
Spindle sliding kinematical motion through a timing belt system with variable speed.
Bridge traverse on special steel guides with ball rollers in oil bath.
Bridge traverse kinematical motion through a pinion/rack system in oil bath with variable speed.
Spindle axis assembled on bearings in oil bath driven by an electric motor through V-belts.
Spindle lifting on round guide with screw kinematical motion with variable speed.
Turntable on a special ball-bearing pivot block, particularly sensitive, with a full load too.
Machine with fast movements and soft at the same time, and particularly silent.
The machine is supplied with water system with solenoid valve and flow-indicator, which stops the machine automatically in case of water lack.
Electrical board at floor level and hanging push- button control panel.
Linear laser for material alignment.
Metallized, cataphoresis treatment.
Main covers in stainless steel.
OPTIONS
There is always enough room for some further desires.
Bench with automatic rotation and precision locking each 45°
Electronic positioning on 360°. Bench rotation visualisation
with control 1/100°.
Adjustable disc rotation speed (inverter): 500:2000 g/1′.
Silenced disc guard.
Possibility to work on more than one bench.

FEATURES
Max blade size of 1600 mm (63 in).
Attachments on request:
- inverter, electronic variator of the speed of rotation of the vertical blades (400-800 rpm) and of the horizontal blade (1400-2000 rpm) for motor up to 150 hp;
- 2,2 x 3 m trolley;
- rotating trolley of 2,2 x 2,8 m and a carrying capacity of 20000 kg;
- automatic discharge conveyor for marble 250 kg maximum.

FEATURES
Load-bearing structure composed of four vertical columns
joined together by crossbeams. Bridge-trolley unit lifted by means of four screws guided by sliders with slide blocks made of anti-friction material; the entire unit is protected by a stainless steel guard. Vertical movement is performed by means of a selfbraking gearmotor driven by inverter.
Large-sized shoulders with milled surfaces and hardened steel interchangeable tracks on which the disc-carrying bridge-trolley unit slides. Sliding takes place on roller cages in oil bath protected by PVC bellows.
The overhead bridge unit with a robust electro-welded steel structure in which two V-shaped guides have been formed for the trolley to slide on. A self-braking gearmotor driven by inverter is used to drive the trolley, fitted with a braking device positioned on the opposite side to the gearmotor to guarantee its correct and stable positioning during cutting. A rack and pinion with slanting teeth and corresponding inverter-driven gearmotor are used to translate the overhead bridge unit.
Disc-carrying trolley sliding on broad cross-section cast iron prismatic slide blocks in oil bath protected by special guards.
Movement is performed by means of a rack and pinion with slanting teeth and corresponding inverter-driven gearmotor.
110 mm disc shaft, for the use of 1 1600 mm diameter discs.
To guarantee a long service life and maximum resistance to corrosion, all the surfaces have been sand-blasted, galvanised and carefully painted with dual component epoxy paints.

AUTOMATIC ELECTRONIC BLOCK-CUTTER FOR MARBLE AND GRANITE
Sawing machine able to transform marble and granite blocks into semimachined slabs having a maximum height of 1500 mm and the thickness desired.
FEATURES
Max blade size of 3500 mm (137.8 in).
Block holder trolley with electronically-controlled positioning with decimal tolerances and adjustable speed.
Movement of the blade holder slide drivens by a rack-pinion on guides in oil bath, free of maintenance with protections made of stainless steel. Separate regulation of the cut/return speed and the head limit stops from the control board.
Possibility to program a reduction of cut increment at the beginning of the cycle to facilitate the entrance of the blade in the block.
Columns, bridge and operating head made of highly resistant cast iron and protections of stainless steel for a perfect dimensional stability and a long-lasting life.
Switchboard including all the operating controls and the colour display. The POLYAX COLOR controls 3 axes of movement.
Possibility to set in multiple cuts 9 diff erent translation measures, repeatable up to 99 times. Possibility to program up to 9 different cutting heights and lenghts in order to work at the same time with blocks having different sizes.
Attachments on request:
- extra 2,2 x 3 m trolley;
- additional machined rail to extend the loading length by multiples of 3 m;
- additional unworked rail to extend the loading length by multiples of 3 m;
- inverter electronic variator of the speed of rotation of the vertical blades (150-300 rpm) for motor up to 50 hp;
- binario grezzo supplementare per allungare la corsa di carico di 3 metri;
- inverter variatore elettronico della velocità di rotazione dei dischi verticali (150-300 rpm) per motore fino a 50 hp.

MAXI 3000 RX and MAXI 3500 RX are sawing machines with a jumbo disc for cutting marble and granite at the desired thickness. These machines follow the Simec philosophy of the NT2 block cutters, with 2 columns fixed to the ground and the mobile block carrying trolley, to guarantee the absence of vibration, high productivity and long diamond lifetime.

4 columns block cutter for cutting granite, lava stone and marble blocks into strips by means of a set of vertical diamond discs and a horizontal disc. It works on stationary block.
M585 is available in several versions according to the vertical discs maximum diameter (from 1300 to 1700 mm) and to the maximum number of vertical discs (34 or 56 discs). It can be equipped with automatic or semi-automatic unloaders.
This 4 columns machine cuts stationary block and produces 460/650 max. wide strips with thickness dimension from 10 mm for modulgranito up to 80 mm for paving stones.
The machine can work even without block carrier trolleys since all movements are performed by its operational units.
M585 machine maintains in time top cutting precision with minimum diamond discs consumption and very reduced costs for production maintenance and depreciation.
The four holding columns, with their large foot bases strongly fixed to the foundation, are stiffened at the top ends through sturdy connecting beams and side ribs.
Four sliders, that move along the columns, support the transversal beams/bridge assembly. All such components, that were made in normalized large thickness steel work, form an extremely rigid structure.
The discs holder trolley, driven by a gear motor/pinion/rack system, slides along two “V” guides in oil bath with the interposition of anti friction slides.
In addition to this, four contrast wheels compact trolley and bridge to realize a “ clearance- free”trolley sliding system.
The discs stack, that is positioned on the trolley/bridge assembly centreline, favours the whole discs holder trolley mass to integrate in a balanced way the contrast wheels action.
Oleodynamic plungers lock automatically the two mobile uprights to the transversal beams during the vertical cutting phase.
Owing to this peculiar construction technology, M585 reduces to zero the discs traction action on the trolley, eliminates vibrations and realizes high quality cuts combined with very reduced diamond consumption.
The cutting parameters are pre set through the key board. Work cycles are controlled through PLC, positions and parameters are visualized in real time on display.
All motion motors are controlled through vectorial inverters and the movements precision is ensured though position digital transducers(encoder).
The inverter for main motor speed control and adjustment, particularly recommended for the optimal discs utilization, is available as optional.
The large dimension remote electric panels are air-conditioned by means of a heath exchanger and are dust proof and water proof in compliance with I P 54 ( EN 60529) standards.

4 columns block cutter machine for cutting marble, travertine and limestone blocks into strips by means of one or more vertical discs and a horizontal disc. It works on stationary block.
M586 is available in several versions according to the vertical disc maximum diameter (from 1300 to 1700 mm), the cutting system and the main motor power. It can be equipped with automatic or semi-automatic unloaders.
Pedrini M586 block cutter is the result of the technological evolution deriving from the manufacturing of more than 2000 models and includes all the necessary characteristics for the production of strips by means of diamond discs.
M586 stands out for its versatility in the cutting of blocks with various dimension and with more or less regular and squared shapes.
The building semplicity, the simple use and the flexibility of every single model of M586 allow for the easy interchange and substitution of diamond discs.
During the cutting phases the diamond discs are cooled ith water by means of distributors designed to ensure their perfect lubrification.
M586 manufacturing technologies allow for the utilization of an up to 220 HP vertical disc motors, making profit of the whole installed power to achieve the maximum cutting speed.
The 4 columns producing the up and down Y axis movement are solidly anchored to the foundations and are stiffened at the top through three connecting beams.
Two reinforcing ribs allow to have the frontal part open to facilitate the usage of the various strips unloading systems and the possible loading of the block directly inside the machine, on the ground level.
The columns house the low friction precision screws, which are synchronized through three shafts that connect the angle transmissions placed on each column. These screws operate into lead nuts mode in antifriction alloy fixed onto the sliders, which travel along the guides that are directly machined onto columns structure.
All lead nuts are equipped with a drop safety system that activates when these are worn.
The bridge movement on Z axis from right to left takes place on two movable beams fixed on the up and down sliders.The translation movement of the bridge is machined on the upper part of the beams by sliding on an anti-wear rollers cage to facilitate the side sliding.
The bridge, built in large thickness normalized steel work with honeycomb structure, houses the transmission for the right-left movement and it is composed of a connection shaft driven through a gear motor/pinion/rack system.
The exclusive double “V” guides which drive the disc holder trolley in a constant and linear way along the cutting and return strokes X axis, are machined onto the upper part of the bridge. A series of oil pits ensure the “V” guides lubrication during the cutting and return stroke movement.

This AUTOMATIC CYCLE machine, that was designed for the sawing of 1000 max. high blocks, is targeted to the production of large thickness slabs for tombstone art, building elements and paving stones.
The axis positioning is ensured by a PLC controlled system that comprises electronic vector regulators (inverters) and position digital transducers (encoders).
Disc down feed can be programmed during last phase of each cutting stroke thus permitting stroke immediate reciprocation and consequent “PENDULAR” motion that eliminates unproductive time.
The machine is equipped with VANISHING DISC that reduces noise level in any working position. Owing to the components high quality, to the sturdiness and precision of the mechanical parts, M950EF is an highly productive and reliable machine that maintains its great efficiency in time.
Two large contact surface “V” guides, machined onto the bridge, allow for trolley clearance- free sliding driven by a rack/pinion system.
Anti friction slides between trolley and bridge and continuous lubrication oil pits cut along the “V” guides enable the trolley stroke to be smooth and without vibrations even in case of high travelling speed.
Contrasting wheels, that compact trolley and bridge, allow discharging of the cutting stress directly onto the foundations.
The disc holder unit comprises an upper platform for main motor mounting and the spindle assembly that are connected to form a sole body through three ground chrome plated large diameter columns that slide vertically into protected housings machined onto trolley structure.
The two columns in front position absorb longitudinal stress caused by cutting action and improve disc performance.
Vertical displacement is driven in a balanced way through two synchronized screw/lead nut systems motioned by encoder controlled gear motor.
Bridge moves along two track ways fixed onto foundations. Bridge transversal displacement is driven through two rack/pinion systems that are synchronized through a connecting shaft motioned by an encoder equipped and inverter adjusted speed gear motor.
Bridge sliding along track ways is guided through two pairs of bearing wheels, with large centreline distance (1200 mm), that ensure bridge stability.
A system of auxiliary contrast wheels reacts to all vertical stress and allows for a very smooth disc performance。

The working centers MAXI RX MOB offer high precision requisites thanks to the translation system of the cutting bridge made with interchangeable steel “V”slides of high resistance, that can also be ground, as well as the precision motors and reducers, synchronized by encoder on each column. Once the machine places itself on the cutting point, it locks its position as to avoid vibrations and accidental movement.