How do you produce a sliding or matching fit using filing scraping and lapping?

To produce a sliding or matching fit using filing, scraping, and lapping, begin by filing the surfaces to achieve a rough shape and remove excess material. Next, use scraping to refine the surfaces, ensuring they are flat and smooth, which enhances the precision of the fit. Finally, apply lapping with a fine abrasive compound to achieve a high degree of surface finish and tolerance, allowing for a precise sliding or matching fit. Regularly check dimensions and fit throughout the process to ensure accuracy.