Honing produces a precision surface on a metal workpiece by scrubbing an abrasive stone against it along a controlled path. Honing is primarily used to improve the geometric form of a surface, but may also improve the surface texture.
Earlier times in Honing, the abrasives used most commonly were Aluminium Oxide and Silicon Carbide. These conventional abrasives performed well but could remove only small amounts of stock and were not satisfactory on very hard materials.
Superabrasive Honing sticks, made from CBN or Diamond, have helped achieve material removal rates many times than what is possible with conventional honing stones. Almost any type of material can be successfully honed by one or both of these superabrasives. This includes all types of steel, alloys, super alloys, cast iron, carbides, platings and coatings, ceramics and glass.
Employing these super abrasives, Honing operations can replace fine boring and internal grinding operations and also certain lapping operations.
In honing, the simultaneous rotary and reciprocating movements of the stick result in a cross hatch pattern on the workpiece surface (angle of incidence ranging from 30 to 70°).
Honing stick is the most decisive interface between machine and work piece. lt determines the performance of the entire Honing process.
Grit size generally determines the surface finish. Bigger the grit size, rougher the surface finish and greater the stock removal.