Porous-structure grinding wheels - Mole Abrasivi Ermoli

MOLE ABRASIVI ERMOLI S.R.L.
Sede ed uffici: Via Cairoli, 4 - 21046 - Malnate (VA)
Tel. 0332-425114 - Fax 0332-426742 - info@ermoli.it - www.ermoli.it
Stabilimento: Via Cairoli, 14 - 21046 Malnate (VA)
Tel 0332-426088
Codice Fiscale e Partita IVA IT 00210280129 - Registro Imprese VA 2386 - R.E.A. Varese 5558
POROUS-STRUCTURE GRINDING WHEELS
Reduce surface contact area between grinding wheel and workpiece, thus reducing
friction, shear stress and overheating
Improve circulation of coolant fluid inside wheel, thus reducing grinding burn on
workpieces
Allow grinding of materials that clog grinding wheel surface such as aluminium, rubber,
plastic, common cast irons or cork
These are just some of the advantages of our porous-structure grinding wheels. Over the last few years
we have perfected various types of porosity and have produced exclusive structures for every
application, which are even able to maintain the profile where necessary.
The large pores contained in super-porous grinding wheels are obtained by adding materials such as
wood or plastic materials to the mix which burn during firing and leave in their place a cavity, or in other
words concave abrasive spheres. The porous structure that we produce can therefore be divided into
three categories, each one recommended for different machining processes:
Large-pore superporosity – grinding wheels with this type of porosity are used above all on
materials that tend to clog the work surface, such as rubber.
Small-pore superporosity – the large amount of small pores ensures the perfect circulation of
coolant inside the grinding wheel. This type is used where it is necessary to reduce the contact
surface between grinding wheel and workpiece and, as a result, overheating. A typical example is
creep-feed grinding.
Spherical superporosity – this type consists of concave abrasive spheres of up to 5 mm in
diameter which wear with the grinding wheel, generating regular pores with a smooth inner
surface, which does not retain the material removed. The walls of these spheres, which in any
case retain their structure, make it possible to use porous grinding wheels for profile grinding.
This type of porosity, unlike the others, can also be used in resin-bond grinding wheels and
guarantees excellent performance in spring grinding.
Large-pore superporosity Small-pore superporosity

MOLE ABRASIVI ERMOLI S.R.L.
Sede ed uffici: Via Cairoli, 4 - 21046 - Malnate (VA)
Tel. 0332-425114 - Fax 0332-426742 - info@ermoli.it - www.ermoli.it
Stabilimento: Via Cairoli, 14 - 21046 Malnate (VA)
Tel 0332-426088
Codice Fiscale e Partita IVA IT 00210280129 - Registro Imprese VA 2386 - R.E.A. Varese 5558
Spherical superporosity Resin - Cubitron