| India possesses huge deposits of cot·undum of very
high purity in Salem, Mysot·e, Rewa and Assam. The
countt·y's production is about f!iJO tons annually. An abtYtsive
wheel consists r>f sl1arp gt·aded grains of ha,·d abt·1~sive material,
united at tl!eit· point of contact by a snitaMe bond and sl!aped.
Different bodies hat'e been compounded with Mysore and
Rewa cot'ttndums and a variety of bonds have been employed
for tlwt pw·pose. The at·ticles are shaped by pt·essing. They
at·e fired at 13~0°0 wl1en the bond sinters and forms a strong
body with the abrasive grains. The fired wheel a are trued to
shape. |
