Here are brief descriptions of the more important items of the machine-shop’s equipment.
(1) The DOALL machine. This machine (fig. [23]) is used for contour metal sawing, filing, and polishing. It is a highly adaptable machine tool for jig work and for making dies. It does the work of a shaper or milling machine and replaces such operations as nibbling, drilling holes to make a cut, and torch cutting. Twenty assorted saws, 3⁄32 to 1⁄2 inches wide; three flat filebands, 1⁄4-inch, 3⁄8-inch, and 1⁄2-inch; and three file guides are standard equipment. The machine is equipped with a 3⁄4-hp, 208-volt, 3-phase, 60-cycle motor.
(2) Toolroom lathe. The 10-inch toolroom lathe (fig. [24]) has a 41⁄2-foot bed and 1-inch collet capacity. It is driven by an underneath, 3⁄4-hp, 3-phase, 60-cycle motor. It is equipped with collet, milling and keyway-cutting, and telescopic-taper attachments, boring and turning cutters, fine and coarse diamond knurls, tool holders, and a large and small face plate.
(3) Extension-bed gap lathe.
(a) This 20-by 40-inch gap lathe has a 14-foot bed and a special, large face plate. With the gap closed, it is used as a regular engine lathe. (See fig. [25].)
(b) The tools and accessories for the lathe include telescoping taper attachment, boring and cutting bars, end caps, bits, chucks, and centers. Also, there is a set of metric thread-cutting gears for use where the metric system is standard. The lathe is driven by a 71⁄2 hp, 3-phase, 60-cycle motor.
(4) Engine lathe. The 16-by 54-inch engine lathe (fig. [26]) also can be equipped with special threads including metric, by using special gearing in the endworks. It is driven by a 3-phase, 60-cycle, 208-volt motor and is equipped with telescoping taper attachments, boring bars, cutters, bits, chucks, tool holders, and metric thread-cutting gears.
Figure 17. Windlass for handling bow anchors.
(5) Shaper.