Sub Module 7.3 Files (ESSAY)
EASA MODULE 7A Sub Module 7.3 TOOLS Files Files are cutting tools for removing metal from a surface and are made of high-carbon steel. The blade is hardened, whilst the tang (to which, a handle must always be attached, for safety reasons, before the file is used), is left in a softer, tougher condition and is, therefore, less brittle. Hand files are classified by their: Length Shape Cross-Section Cut Grade The length of a file is measured from the shoulder to the tip of the blade. Files are available, for special work, in lengths from 75 mm (3 in) to 350 mm (14 in). The most common sizes are 150 mm (6 in), 200 mm (8 in) and 250 mm (10 in). Files are available in a variety of shapes (refer to Fig. 3.9), and the most common shapes are those which are: Tapered Parallel Bellied Shapes of Files The various shapes and the cross-sections of files allow them to be used on a wide range of tasks. The standard file ...