What is honing process?

Honing is a sort of hole finishing operation performed after drilling. The honing tool is a multipoint cutting tool. There will thin projections parallel to the length of tool extending from one cross section to other. When the tool is inserted into the hole, a loading is given on the cross section of the tool which extends a spring attached to the projections pushing the "abrasive cutting edge" out side and then it is rotated so as to give finishing. This method is generally use in the cylinder of IC engines..

Rough sketch:-

------------------------------

=================

=================

-----------------------------

Dotted arrows show the 2 peripheries of the cutting tool and "equal to sign" shows edges of abrasives. The pushing of spring radially connected to the centre pushes the cutting edge of abrasives out which enables finishing operation