GHM edia
B usiness
ARTICLE
Global
MDA
Guindy Machine Tools Limited (GMT)
recently manufactured and supplied an extra-large
sized granite surface plate measuring a whopping
12m in length
1: Granite Table for marine crankshaft inspection
Size: 12000mm x 1500mm x 500mm
Flatness: 50 micrometer
With T-Slot - Straightness 10 micrometer per metre
The Story behind this milestone achievement...
Apart from complete range of standard granite and cast-
iron metrology dimensional inspection equipment, GMT’s
Metrology Division offers custom built metrology products
like large size granite plates and granite base structures for
Special Purpose Machines.
It is an acknowledged fact that granite from the Deccan
plateau in South India, where GMT’s metrology division is
located, is the most suited for metrology. Once the order
was placed, experts from GMT visited several quarries in
20 | january-february 2019 |
this region to select a single block of granite measuring a
minimum of 15m x 2m x 1m. Choosing the stone is a crucial
first step in any precision granite product - As granite is
a natural material and its properties can vary from vein to
vein in the quarry, GMT initially identifies the correct vein
in the quarry to source the stone, for such special pieces..
Finally, they located a single piece of granite suitable for this
application. It was then transported to the factory, cut to size
and hand lapped by a team of skilled workers to perfection.
GMT has supplied thousands of surface plates to the Indian
manufacturing industry. This is the largest single piece surface
plate manufactured by GMT in the company’s 60 years of
existence.
The T-Slots were another story…
The plate was too long, large and heavy to be accommodated
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