A 1/2 in. (12.7 mm) radius ball contact point is loaded with a spring pressure of 980 g. The softer the mould surface, the greater the penetration into the moud. ? A mould offering no resistance to the contact point would have a zero reading and one having hardness capable of preventing penetrationwould read 100. ? A maximum reading stop holds the reading when testing in blind portions of the mould.
Manufactured in accordance with AFS specifications, our Tester is used to hardness of green mould Hardness determine surface sand mould. The Hardness test can be performed within seconds; user simply presses the tester against the mould surface and notes reading on the dial. Excessive pressure will not alter the reading and it operates in any position.