Sawfiler Variations include face angle, face length, back angle, gullet width and depth, and a frost notch (if necessary). Typical bandsaw tooth dimensions are 1-3/4" tooth space x 3/4" gullet depth x 3/4" gullet width (grinding wheel width) x 30deg face angle x 16deg back angle. Fitting means tooth dressing and involves swaging, shaping, gauging, and grinding. The tip of the saw tooth is swaged to a flare, then the sides are compressed in slightly with a shaper tool to an exact kerf. Then a final grinding pass is made. The usual gauged tolerance is +/- .005" in kerf, and <
Twist per inch find the number of twists per inch for the single, or one can use the doubled back yarn as a measure. With a thick-and-thin yarn, it is best to count the twist over several inches and average the results. This is because the number of twists per inch will tend to vary between the thin and thick sections. In the industry the number of twists per inch is calculated as: formula_1 where formula_2 is the Twist Multiplier, also known as formula_3 or the Twist Factor. This Twist Multiplier is an empirical parameter that has been established by experiments and practice