deform the metal in a way that counteracts the forces the saw sees during operation. More rolls are placed in the midsection of the saw. Resaws have the back pulled to counteract the uneven heating of the cutting edge. This is done by rolling the back (non cutting edge) of the saw. The back is measured with a three pin gauge, and is usually around .003" per three feet curved. Other bandsaw duties include welding broken teeth, fixing cracks, and trouble shooting lumber defects. CNC equipment has evolved to the point of being able to do significant benching and fitting tasks without human monitoring. Most of the above terms are North American and are called different things in Australia, New Zealand as well as elsewhere in the world. A saw filer does both the tasks of the benchman and filer at the same time, with no distinction between the tasks as well as having to do circular saws and bandsaws. This like filing rooms are called Saw Shops in Australia. Most Saw Mills in Australia and New Zealand run a stellite tipped bandsaw in which the majority of what is stated above becomes redundant as it is specifically for sharpening and making the swaged tipped saws. Circular saw benching Saw filers have the same maintenance duties with circular saws as they do with band saws, with a few exceptions; leveling is done mostly with specialized hammers of which there are 3 main types Dog head (side on profile resembles a dogs snout), twist face (A double sided hammer in which the faces are in a 45 degree alignment) and cross face ( faces are at 90 degrees to one another) and anvils (there are 2 main type of anvils dead (for levelling the saw) and live(for both leveling and tensioning the saw), although stretcher-roller machines are also used for leveling and tensioning. Circular saws can be solid tooth (straight saw steel which are bent to give clearance of the saw blade) or can have carbide, Stellite or insert teeth that don't need swaging. Fatigue cracking of the tooth gullet is not as common as in band saws. See also Bandsaw Circular saw Saw mill Saw Portable sawmill References Industrial occupations Metalworking occupations Saws