The spindle used here is mainly used in high
rpm operations and where heat is produced immensely.
The speed of about 2800-5600 rpm induces heat and the
to and fro motion of the spindle causes its walls to brush
against the cage bearing balls surfaces which are mainly
made up of carbide. Due to this the problem of
indentation arises after a considerable time period on
materials which are used in developing the spindle. This
spindle problem came to attention after observing ball
bearing indentations on the spindle surfaces which
became visible as the time progressed. The original
spindle costs very high as it is imported, so it was
decided to develop a spindle in house. This indented
spindle can be brought into use again by another
method which is hard chrome plating, but the life of this
spindle is not as much as the original one and have to be
reground and re-chrome plated till the spindle can
suffice. Thus the study made observations that the
original spindle after indentation is not suitable for use
and cause disruption in process parameters and the
actual production process is hampered. The study was
made by visualization and hand feeling of the
indentation, the decision of new spindle developed in
house resulted into a far greater efficiency of the spindle
and costs much less than the original one and gave
better reliability and durability than the chrome plated
spindle.