In machine lapping, for hard materials, pressure up to _________ is applied.

Explanation

Explanation:- Lapping It is used to produce finished surfaces. It gives a very high degree of accuracy and smoothness. It is used in the production of optical lenses, metallic bearing surfaces, measuring gauges, surface plates, and other measuring instruments. Machine lapping is recognized as a fast lapping process. In machine lapping, pressure up to 0.02 N/mm 2for soft material and 0.5 N/mm 2for hard material is applied. Additional Information Honing is a finishing process, in which a tool called hone carries out a combined rotary and reciprocating motion while the workpiece does not perform any working motion. The surface finish of the cylindrical hole is maintained by honing. Filing a file is a piece of very hard steel that has a series of parallel grooves cut into it, which leave behind rows of sharp cutting teeth. Files are typically used by hand. Buffing is similar to polishing in appearance, but its function is different. Buffing is used to provide attractive surfaces with high luster.