| The high speed grinding wheel has become an indispensible
instrument in the modern metal forming industries. The wheels
are of various sizes and shapes and run at velocities ranging
from 2,000 to 5,000 r.p.m. Natural abrasives like corundu·rn
and emery largely figured in making these wheels in the past
but artificial products such as carborundum, alundum are now
assuming greater importance. Yet, the natural abrasives
hold their own in countries where they are cheap and abundent.
Even in America, the home of artifieial abrasives, there arc
concerns now manufacturing corundum wheels. For instance,
the Eagle Grinding Wheel Co., Chicago, manufacturers of Corundum
grinding wheels, abrasives etc. a-dded a two storied building
last year to increase their output. There is little reason why
India should hesitate to develop this industry especially when
it abounds in good deposits of corundum. |
