4-21. Lapping - Continued
Figure 4-47. Lapping on a Surface Plate
General. This section contains a general discussion for proper selection of a file and method of filing. For a more
detailed discussion about files, refer to TM 9-243, Use and Care of Handtools and Measuring Tools.
Selecting Proper Files. The following steps are recommended for selecting a proper file:
For heavy, rough cutting, a large coarse, double-cut file is best.
For finishing cuts, use a second or smooth cut, single-cut file.