Precision mechanical machining


From cast iron to treated steels, from stainless steels to sintered parts, aluminium, carbon fibre, light alloys and ceramic, MAS honing machines are able to hone virtually any kind of material and make any type of hole: through-hole, dummy hole, with seat or spline. Diameters range from 4 to 60 mm and lengths up to 400 mm.

The use of sintered metal bond diamond-tipped monobloc honing machines achieve, as do the new high performance MB units mounted on floating or rigid mandrels, a tool life exceeding One Million Bores without any need for in-process adjustments.

  • Refrigerating Compressors,
  • Automotive,
  • Hydraulic,
  • Gearing,
  • Aerospace.

Progressive Masks: the added value of high precision
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MAS Progressive Honing machines give unsurpassed bore accuracy and are ideal for the production of medium and large mechanical components.
A comprehensive range of specialised honing machines can be supplied, with either rotary or linear tables, from 1 to 24 stations, equipped with special clamping fixtures, floating mandrels and rods for tool adjustment, together with CNC or PLC control of each parameter, giving excellent roundness, cylindricity, taper, straightness and surface finishing results.

MAS honing machines are supplied with integrated oil cooling and filtering systems.


MAS has developed a brilliant new innovative, flexible, modular honing system that provides flexible solutions to meet all your honing needs. The brilliant new idea consists of Honing Expansion Modules which can either be used as stand-alone lapping units or combined with Progressive Honing modules. The Expansion Module has been designed for roughing large quantities of material whilst simultaneously creating a crosshatch pattern. Its machining range is from ø 5 to ø 100 mm.
It provides fast, accurate and precision honing for a wide variety of jobs such as gears, cylinder liners, cylinder barrels, connecting rods, rocker arms, fuel injectors and hydraulic valves.
The compact design is simple, robust and modular. Standard features include CNC control of both honing cycle parameters and the coolant filtration system.
MAS Expansion Modules are designed to work with both their own expansion honing mandrels and tools plus other types made by all the major honing manufacturers.


With the combi system it is possible to engage in large-scale material removal using the expansion unit and make the very most of progressive tool calibration precision.


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