Softer bond segments will be required in order to
encourage segment wear (as there will be not slurry to
help diamond segments to wear).
Scratches from diamond grit will not be as deep
compared to if it were also used for wet grinding.
There will be more heat generated by the diamond
Summary of diamond principles
Diamond segments need to wear in order to achieve
productivity. Diamond segment wear can be inﬂuenced by
the following factors:
Hardness of bond.
Diamond grit size.
Presence of water.
Number of segments under the machine.
Adding an additional abrasive (e.g. sand, silicone
carbide) on the ﬂoor will increase wear.
Generally, the faster a diamond segment wears, the faster
the productivity will be. By varying the above factors,
changes can also be made to effect the following:
Current draw of machine.
Flatness of ﬂoor (see next section).
Ease of operation.
Full and half sets of diamonds
The way diamond segments are set-up on the grinding
heads of the machine will also greatly inﬂuence the
performance of the machine, the productivity levels and
also the ﬁnished ﬂoor quality.
There are basically two types of diamond conﬁgurations
that can be used when using the grinder:
Half set of diamonds – when there are diamonds
placed at three alternating positions on the diamond
12 – English
Full set of diamonds – when there are diamonds
placed at each of the six positions on the diamond
By changing the way the diamonds are set-up on the
diamond holder discs, an operator can signiﬁcantly effect
the performance of the machine and therefore, the
Half-set of diamonds
When the diamonds are set-up as a half-set, they tend to
follow the surface of the ﬂoor. Similar to a tripod for a
camera, which can be placed on an uneven surface and
yet still ﬁnd a stable footing.
The half-set diamond conﬁguration should only be used
when a ﬂat ﬂoor ﬁnish is not required.
Full-set of diamonds
When the diamonds are set-up as a full-set, they tend not
to follow the surface of the ﬂoor. If the ﬂoor has
undulations, the machine will grind the high areas yet
miss the low spots.
The full-set diamond conﬁguration should be used when
a ﬂat ﬂoor ﬁnish is desired.
The below table gives some examples of possible
applications for the two arrangements:
Ceramic tile adhesive removal
Carpet glue removal
Epoxy paint removal
Vinyl adhesive removal
Rain damaged concrete
Smoothen exposed aggregate
Lippage removal between
cementatious based tiles.
Surface polishing of concrete
Grinding to expose aggregate in
concrete polishing application
Flatten undulations in concrete
Re-polish ﬂoors that have been
Full set Half set