Types and Uses

TM 9-243 TYPES AND USES SPRING TUBE BENDERS There are two types of spring tube benders, external and internal. The spring tube bender permits the bend- ing of small diameter tubing by hand without collapsing the tubing. External benders are used to bend straight sections of tubing which have at least one end which has not been flared. They are available in 1/4, 5/16, 3/8, 7/16, 1/2, and 5/8-inch diameters. Internal benders are used for bending straight sections of tubing which have both ends flared. They are availa- ble in 3/8, 1/2, and 5/8-inch outside diameters. HAND TUBE BENDER The hand tube bender consists of the following compo- nents: a handle (1) a radius block (mandrel) (2), a clip (3) and a slide bar (4). The radius block is graduated from 0 to 180 degrees, and the slide bar has a scribe mark which indicates the degree of bend. These benders are available in 3/16, 1/4, 5/16, 3/8, and 1/2-inch sizes. The hand tube bender is used to bend copper, brass, or aluminum tubing to specific angles. ELECTRICAL CONDUIT HAND BENDER The electrical conduit hand bender has precise grooves to insure a smooth bend. It has a concave base (1), a foot rest (2) and a retaining hook (3) to keep conduit from slipping as it is being bent. The bender has a threaded opening for attaching a threaded piece of pipe to be used as a handle. Electrical conduit hand benders are available in 1/2, 3/4, 1, 1-1/4, 1-1/2, and 2 inches in diameter. They are used to bend thin wall and rigid conduit to allow for flat installation on inside building walls. 40-2