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The granite bed material is an artificially reconstituted granite, i.e. a material made from a synthetic resin and a hardener, combined with naturel stones used as aggregate.

Advantage for the machine tool

  • High thermal stability
  • High dynamics rigidity
  • Less vibrations
  • Longest tool life
  • Dimensional and geometrical life expectancy


  • 8 times better damping properties than cast iron.
  • Vibration range is 3 times less when machining.
  • Higher resonance frequency.
  • 15 times lower thermal conductibility than cast iron.
  • Specific heat twice as high as cast iron.

These damping specifications were determined using same size samples subjected to impacts, under similar conditions.

Results when machining

  • Better surface condition.
  • Bette machining accuracy.
  • Durable dimension repeatability.
  • Tool lifespan increased by 20 to 30 %
  • Makes possible to machine hard materials

Moreover, as it is easy to shape, it makes possible to produce optimized geometrical shapes. Considering environmental constraints, there is no waste and less energy is required to manufacture it. Carbon footprint is therefore much better than with traditional cast-iron frameworks.

If necessary, contents can be changed in order to modify the specifications used to produce our machines:


-       Better surface condition.

-       Bette machining accuracy.

-       Durable dimension repeatability.

-       Tool lifespan increased by 20 to 30 %

-       Makes possible to machine hard materials

Density: ρ = 2450 kg/m3
Modulus of elasticity: E = 36-42 kN/mm2
Tensile strength: σx = 20 N/mm2
Pressure strength: σp = 120 N/mm2
Bending strength: σb = 35 N/mm2
Thermal conductivity: λ = 0.83-1.94 W/m/°K
Expansion ratio: a = 14.10-6 /°K
Specific heat: cp = 1250 J/kg/°K

Other benefits of GRANITAN when producing beds :

  • No measurable dimension variations caused by ambient humidity.
  • Neutral to contact with oils and mineral emulsions.
  • High-quality surface conditions; no defects.
  • Fabrication is quicker and cheaper than with cast-iron beds.



Combines user-friendliness of conventional machines with performances of CNC machiness

The SOMAB PL+S control allows the operator totally showing his/her professional skills, without using any programming language, when producing the first part, thanks to the teach-in control mode. Writing, setting up the program, and producing the first part are made simultaneously.

Therefore, the accuracy is better and you save time when producing one-off order parts as well as small and medium batch of parts, thanks to the cycle-memorization device.

Even is he/she has no programming knowledge, the operator can realize cuts that would be impossible in conventional machining:


  • Tapers
  • Rounds
  • Caibrated chamfers
    • Conical/cylindrical threads
    • With 1 or more threads
  • Consideration of tool radiuses
  • Grooves
  • Chain of shapes


  • Flat 15 " touch screen
  • 3 operating modes
    • User's manual
    • Conversational
    • ISO
  • 2 electronic hand wheels
  • Front USB drive
  • RJ45 – Ethernet connection socket
  • Min. 2 GB memory
  • 3D graphical simulation

3D simulation, on a CNC, is used to control how a program is performed, to visualize machined surfaces and tool motions, in order to prevent any programming error.


For multifunction machines and live-tool lathes

Simulator on a PC

Simulators SOMAB PL+S √T (turning) and SOMAB PL+S √F (milling) are teach-in and programming units installed on a PC.
Once it has been installed on a PC, the simulator allows benefitting from the whole potential of the CNC and can perform, on screen, the same tasks as the CNC. The simulator can be used by the technical department to perform programming and can be used as a teaching tool within the company, in schools, universities and any teaching/training places. The simulator is equipped with a virtual on-screen keyboard used to simulate CNC specific keys (operating-mode selection, direct-access keys, axis-motion keys, etc.)
The simulator can be used to edit and simulate a program, while not being disturbed by noise and production facilities, and to display results on the PC (through a graphical simulation) prior to machining the programmed part. Once the program is correctly set up, it can be uploaded to the machine, in order to perform machining.
The simulator is sold as a single-license one, for 1 working station, or as a multi licensing one, to be installed on different working stations.




Our lathes can be customized to meet our customers’ specific machining

Machining hard materials requires a rigid machine tool, best fitted with no-vibrations, cast-iron on iron, scraped, prismatic guide ways. At SOMAB, we oversize linear guide ways and we place them on turcite. Also, we strengthen spindles. Then, one has to use tools able to machine the hardest materials, thus using coated carbide tools or, more usually, CBN tools. As CBN tools are fragile, they cannot be used with a non-convenient cutting speed. SOMAB lathes can be used to machine radiuses, slopes and other profiles by programming a constant cutting speed, adapted to variations of turning diameters. Cutting edges of these expensive tips cannot be chipped and surface condition is even throughout machining.


Surface condition: 0.18 Ra
Circularity: 0.9 micron
Diameter accuracy < 5 microns
Dimensions: Ø 100 x 125 mm
Material: Z160
Core hardness: 62 HRC


We study and supply turnkey solutions

Special colours and covers, CNC integration, with part loading/unloading


We study and supply turnkey solutions