Fig. 95 shows a type of circular-sawing machine such as is used for pattern-shop work. This machine consists essentially of (1) a frame which carries the saws, saw mechanism and table; (2) a flat-topped saw table of ribbed cast iron, and (3) one or two saws mounted ready for use.

Fig. 95. - Circular Saw.

The saw table is made in two sections, divided along AB. Both sections always remain in the same plane relative to each other, but the part C is mounted on suitable slides on which it may be moved back and forth in the direction AB parallel to the plane of the saw. Small work to be sawed is held by hand against the guide or "fence" D which may be set so that the end of the piece of work will be cut off at any angle desired as the movable table carries it past the saw. The block G may be adjusted along the stop rod for gaging the length to which pieces are sawed.

When the machine is used for ripping boards into narrower widths, the ripping fence F is set as a guide at the distance from the saw necessary for cutting the widths required. Kipping, or sawing along the grain of wood, is done by the coarse-toothed saw for more rapid working.

While the upper saw is in use, the belt which drives the saws is not in contact with the belt wheel of the lower saw, hence this saw is idle. When the lower saw is to be used, it is revolved into position by turning the wheel W while the machine is not running, and as one saw is carried into position for use, the other is simultaneously carried below the table.

Fig. 96. - Woodworking Lathe.

The saw table may be tilted about AB as an axis for sawing at an angle. The saws should run at about 600 revolutions per minute.