1. File body: the part contained between the file tip end and the file shoulder is the file body. For those without shoulder file shaping file file body refers to the part with file lines.
File handle: the part outside the file body.
The parallel part of the file body: the parallel part of the busbar in the file body is the parallel part of the file body.
Tip: The part between the starting point and the tip end where the cross-sectional size of the file body begins to shrink gradually. (Length of file body = length of tip + parallel part of file body)
Main file lines: file lines that play a major cutting role on the file work surface are mainly file lines.
6. Auxiliary file lines: the file lines covered by the main file lines are auxiliary file lines.
Edge file lines: the file lines on the narrow edge or narrow edge are edge file lines.
Main (Auxiliary) file lines oblique angle λ(ω): the main (Auxiliary) file lines and the acute angle of the file body axis are mainly (Auxiliary) file lines oblique angle λ(ω).
Bevel angle θ: the sharp angle between the edge file and the axis of the file body is bevel angle θ of The Edge file.
Number of file lines: the number of file lines per 10mm length in the direction of the file axis is the number of file lines.
File tooth bottom line: On the vertical section of the main file pattern, the straight line passing through the bottom of two adjacent teeth is the bottom line of the teeth.
Tooth height: the distance between the top of the tooth and the bottom of the tooth is the height of the tooth.
Rake angle of tooth: On the face of the main file passing through the tooth tip, the sharp angle of the intersection between the cutting edge surface and the face of the file tooth relative to a perpendicular line of the connection line at the bottom of the tooth is the rake angle of the tooth
