GMT commenced manufacture of Cast Iron Surface Plates, as per
BS 817-1957. After supply a number of Surface Plates we had problems in quality
of castings due to Plate ribbing which were diagonal as per BS. P.Venkat Raman then studied
DIN 876-1963, and found it has orthogonal ribbing and made new pattern for
Surface Plate as per DIN. This ribbing pattern had distinct advantages in
making castings. The plate is also quite rigid due to its ribbing pattern.
To be continued....
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