Circular Saw

Steel disk, revolving around an axis, with a speed at the periphery of about 3,500 ft. per minute. In this periphery are cut the teeth, their shape differing according as the wood is to be slit lengthwise or cut acro the grain. For large saws inserted teeth are often used; to prevent distortion and strains in the plate due to heat when at work, radial slots have been made which open and close as temperatures vary; for cutting grooves a wabbling saw has been used, the saw revolving around an axis to which its plane is inclined; dished Circular Saw. saws with curved plates are used for cutting staves and other curved work; plates of very thin gauge are used for resawing and for valuable lumber, the strength being given by a tapering flange of large diameter; some such saws are made up of a number of sectors, with copper strips dovetailed into the joints. Circular saws may be used in gangs to cut up a number of planks at once; the work may be fed to the saw, or, for cutting off, the saw may be fed to the work.