Correct option is D
Honing is a
superfinishing process used to improve the
surface quality and dimensional accuracy of internal cylindrical bores, such as
engine cylinders and hydraulic cylinders. It involves a
rotating and reciprocating abrasive tool that removes
small amounts of material (0.005–0.02 mm), creating a
cross-hatch pattern for better lubrication retention.
Honing enhances
roundness, straightness, and surface finish, achieving roughness as low as
0.1–0.8 µm Ra. Unlike grinding, which is used for external surfaces, honing is
specifically designed for internal bores, making it the ideal process for
precision finishing.
