① High machining precision

Especially for small and medium-sized through holes, the cylindricity can reach within 0.001mm. For parts with uneven wall thickness, such as connecting rods, the roundness can reach 0.002mm. For large holes (diameter within 200mm), roundness can also reach 0.005mm. Without annular grooves or radial holes, straightness within 0.01mm is also possible. Honing has higher machining accuracy than grinding. During grinding, the bearing supporting the grinding wheel is located outside the hole being honed, which can cause deviations, especially in small hole machining, where grinding is less accurate than honing. Honing generally only improves the shape accuracy of the workpiece. To improve the positional accuracy of the part, some necessary measures need to be taken. For example, a panel can be used to improve the perpendicularity of the part's end face to the axis (the panel is mounted on the stroke arm, adjusted to be perpendicular to the rotating spindle, and the part is machined against the panel).

② Good surface quality

The surface has a cross-hatched texture, which is beneficial for lubricant storage and oil film maintenance. It has a high surface support ratio (the ratio of the actual contact area between the hole and shaft to the mating area between them), thus it can withstand larger loads, is wear-resistant, and improves product lifespan. Honing speed is low (a fraction of grinding speed), and the honing stone has surface contact with the hole, resulting in low average grinding pressure per abrasive grain. This minimizes heat generation on the workpiece, leaving almost no thermal damage or altered layer on the surface, and minimal deformation. Honed surfaces have almost no embedded sand or extruded hardened layers. Grinding has higher cutting pressure than honing, and the grinding wheel and workpiece have line contact with each other, resulting in higher relative speeds. This can generate high temperatures in localized areas, potentially causing permanent damage to the surface structure of the part.

③ Wide range of processing applications

It is mainly used for machining various cylindrical holes: through holes, holes with axial and radial discontinuities such as radial holes or grooves, keyway holes, spline holes, blind holes, and multi-step holes. Additionally, with a dedicated honing head, it can also machine conical holes and elliptical holes, but this is generally not used due to the complex structure of the honing head. External honing tools can be used to hone cylinders, but the amount of material removed is much less than that removed by internal honing. It can machine almost any material, especially for diamond and cubic boron nitride applications. It also improves the efficiency of honing processes.