Sawing machines and cut-off machines are used to cut raw materials to specified lengths or sizes. Sawing and cut-off machines are industrial-strength saws or knives designed for heavy, repeated use. Concrete sawing uses diamond or silicon carbide blades or discs. Metal sawing requires a saw with a fine-toothed blade. As a general rule, at least three teeth should touch the material. The blade of a band saw machine is a narrow band of toothed metal. Band saw machines are well-suited for cutting irregular shapes. Wire sawing uses diamond-encrusted wire to cut thick or awkward concrete or masonry shapes, such as bridge sections, jetties, columns or beams. Cut-off machines or chop saws can be used to cut roll-formed parts into desired lengths. A sawing machine such as a copper tube cut off machine meets specific requirements. Wood sawing machines that are used for log cutting can be circular saws, band saws, or reciprocating saws.
Sawing machines and cut-off machines can be floor, bench, or portable tools with 12 in. or 14 in. blades. They operate at speeds such as 3,900 rpm or 5,000 rpm. Options include a large footplate for stability and increased depth of cut; left-side or right-side handles for operator control and safety; lock-on buttons for extended cutting; a quick-release, pivoting vise for securing the workpiece; a locking arbor for quick wheel changes; and a magazine loader. Abrasive sawing and cut-off machines use abrasive discs for cutting tough, hard materials. Reciprocating saws are also suitable for sawing through thick, tough metals.
Sawing machines and cut-off machines conform to standards such as American National Standards Institute (ANSI) standard ANSI Z9.2, which governs the design and operation of local exhaust ventilation systems. Sawing and cut-off machines may also conform to standards such as ANSI B11.10, which establishes various safety requirements for metal sawing machines.