Quartzite Multi Blade Gang Saw

The frame is provided with two carriages for loading and cutting of the blocks and of a transporter on rails for moving the carriage once released from the frame at the end sawing.

DGS1800: Marble strips gang saw
Marble gangsaw, version whit the lifting of the block, specifically designed for the cut of layers into strips up to a height of 650 mm.
The layer is fixed on the platform by a vacuum system which allows the perfect anchoring of the material during the cutting solicitation. When the blades are completely inside the material, an automatic oleodinamic pusher starts in order to make the strips compact in to keep the stability even if the material is fragile or defective.

This 80-blade gangsaw is characterized by the raising of the block during the sawing phase.
General characteristics:
Flywheel in two halves diameter 3.5m.
Main battery shaft and crank made of high resistance forged steel, rotating in high quality spherical roller bearings.
The main plummer block, made of cast steel, is completely immersed into the concrete, providing a very strong anchorage to the foundations thus enabling an operation free of vibrations which are dangerous to the machine and the diamond blades.
The main motor is powered through a soft starter to control the starting speed and time.
The connecting rod, made of high quality steel, guarantees a high resistance to the dynamic stresses generated.
The main frame is totally fabricated from high strength steel, dimensioned to guarantee an absolute rigidity and stability under load.
The sliding system is made of specially designed sliders, completely immersed in oil.
The motorized block carrying trolley enters the machine from the front side and is automatically locked to the lifting platform as it starts to lift. This lifting motion is driven by steel screws and alloyed nuts with trapezoidal threads, amply dimensioned. The sliders on the columns, prismatic and flat, are made of Teflon. The whole lifting system is protected by polyurethane bellows.
The lifting platform speed variation is achieved by a group of gearboxes and clutches controlled by an inverter.
The nuts and sliders of the lifting platform are equipped with safety devices that stop the machine as soon as the wear becomes excessive.
The machine stops automatically if there is a drop of pressure in the cooling water.
The main chassis is equipped with a set of steps and passage ways, anti-slip and anti-accidents with pipe rails all around, to allow access to the top part of the machine.

Multi-disc machine "Baikal-1200"
The multi-disc machine "Baikal-1200" is designed for cutting granite blocks with a maximum size of 2000 * 1000 * 500 mm into workpieces with a thickness of 20 mm and more and is used for mass production of borders and thick-gauge slabs *.
The cutting tool of the machine is diamond circular saws with a diameter of 1200 mm, which are mounted on a spindle and delimited by spacers of a certain size. The whole process of sawing natural stone (movement of the self-propelled cart, lowering / raising the spindle) takes place in an automatic multi-pass mode according to a given program.
The simplicity of the design and the absence of high-wear screw elements make the "Baikal-1200" durable and undemanding in maintenance.
The resulting thick slabs can be further used for the production of sawn and sawn-chopped paving stones using a multi-disc machine "Ampir-400/7" and a stone-splitting press "Antey-50".

The multi-disc machine "Baikal-1600" is designed for cutting granite blocks with a maximum size of 2000 * 1000 * 700 mm into workpieces with a thickness of 20 mm and more and is used for mass production of borders and thick-gauge slabs *.
The cutting tool of the machine is diamond circular saws with a diameter of 1200 mm, which are mounted on a spindle and delimited by spacers of a certain size. The whole process of sawing natural stone (movement of the self-propelled cart, lowering / raising the spindle) takes place in an automatic multi-pass mode according to a given program.
The simplicity of the design and the absence of high-wear screw elements make the "Baikal-1600" durable and undemanding in maintenance.
The resulting thick slabs can be further used for the production of sawn and sawn-chopped paving stones using a multi-disc machine "Ampir-400/7" and a stone-splitting press "Antey-50".

Grizzly Super multiblade gang saw for granite blocks

Traditional multiblade gang saw for granite blocks cutting, using steel blades and abrasive steel shots.

The cutting speed is automatically controlled by the PLC, which determines the component percentages in the mix (slag, water, lime, granite dust) and keeps them constant

This machine, that was designed for the quick sawing of marble irregular blocks, synthesizes extensively experienced technical solutions that have been realized through Pedrini most advanced technology. GS 122, that is manufactured in the versions for 30, 40 and 50 blades, is a gang saw with superior characteristics regarding the perfect dynamic balance and the extremely rigid structure that allows for blades stack considerable width extension with the use of the maximum tension. Owing to their exceptional productivity, not far from that of the closed frame gang saws, the versions for 40 and 50 blades are particularly indicated as well as for the "on the ground" sawing of fragile marble large regular blocks and achieve optimal quality results in case of difficult materials such as lava stone.
Mobile frame made of structural steelwork with very high rigidity. Structural steelwork support structure with hollow columns fitted to the machine foundations. Blade carrier made of sectioned structural steelwork with very high horizontal rigidity. The oscillating movement of the blade is generated by a connecting rod-crank system with two cranks driven by an electric motor, regularised by a heavy cast iron flywheel.

This machine distinguished essentially by many innovative design and technological solutions realized through high level experience and knowledge of the problems met in the use of granite gang saws and well known by the Designer and Mordenti, has solved the sawing requirements allowing very high hourly feeds (almost triple) on class 4 granites using normal blades and metallic grit. It is thus a realization which represents a cooperation between the experience of the technicians of this field and Mordenti, a Company distinguished by the high construction reliability, which has allowed to increase considerably the hourly output of the granite gang saws, to assure machine functionality in the long run, equip it with automatic lubrication, operation and control systems together with suitable structures of the various components which guarantee limited investement and maintenance costs in relation to the production achievable.
The important innovation and technological heart of the machine is the interesting patented mechanical application which allows the blade frame to be lifted and fed several times with the normal abrasive mixture during its wide rectilinear cutting phase and give contemporaneusly a percussion action in the descent phase.
The combination of the lifting stroke and force action is adjustable in intensity and frequency depending on the material that is being sawn and the hourly feeds required. Furthermore, at the ends of the stroke, the blade frame rises much more than the other present gangsaws and this increases the feed of the abrasive mixture, all flexible and integrated to the results one wants to achieve.
The combination and use of these three factors has brought a considerable advantage to granite sawing without being particularly burdensome but as a matter of fact allowing to increase remarkably the hourly feed and the sawing time of the block by bringing a considerable technological development to this field in connection with the modern production systems and absolute cutting precision also for 11 mm. thick slabs.
The movement of the blade frame is clearly different from those presently on the market as with the patented system the stroke of rectilinear movement is adjustable and there is wide lifting in the reversal points. This allows greater contact between blades and block and a considerable supply of the abrasive mixture due to adjustable amplitude of the rectilinear stroke and rise of the blade frame.
The patented device which eliminates the oscillating arms, silentblock and other infrastructures relative to the traditional gang saws is made up of a sector with variable radius of curvature with counter part on tempered flat guide with relative gears for the phasing of the blade frame movement. All is held in proper boxes in oil bath arranged at the ends of the frame members together with other particulars that with very rational and simple solution assure rectilinear movements of the blades and high removing capacity in time. This solution also allows to have shorter columns considering blocks of the same height. The main features that highlight the gang saw Turbomord are:
1) High reliability and design with relevant technological innovations, respecting however the traditional concept of granite sawing.
2) Automatic closed circuit oil lubrication system.
3) Control board with logic P.L.C. program.
4) Elimination of the connecting rod adjustment in the feed stages.
5) Almost absolute absence of maintenance.
6) Design in compliance with the environmental protection rules due to absence of oily residuals and for the possibility to install soundproof panels on request.

Özteknik Makine manufactures OZKM80 gang-saw, equipped with maximum 80 diamond blades, to transform a stone block to many slabs simultaneously and efficiently.
Özteknik Makine’s OZKM80 gang-saws employ components that are carefully designed to transfer the movement to the blade rack, flywheel and the connecting rods. The 3.5 meter flywheel is of cast iron, and guarantees a constant cutting speed. Flywheel drive shaft, produced from steel, and two cast iron supports and two spherical roller bearings on both sides ensure the flywheel’s continuous motion.
The blade holder, or blade rack, is made of steel plates joined solidly together, and slides on straight articulated guides that require little to no maintenance.
Two cranks on the flywheel driveshaft drive the two connecting rods that transfers the movement to the blade rack. The connecting rods are made out of machined steel monoblock. With this way, power and thrust is transferred to the blade holder via two rods instead of one. In addition, any risk of deviation in the movement of blade holder is therefore removed.

GS122 is an open frame gang saw for sawing marble blocks. The gang saws of the range GS122 are available in 3 versions: with 30, 40 and 50 blades according to the working width of the blades holder frame.
Open gang saws are mainly used for sawing irregular marble blocks and when big productions are not required.