TM 9-243TYPES AND USES - ContinuedADJUSTABLE-BLADE REAMERThe blades of an adjustable reamer are separate fromthe body and are fitted into grooves in the threadedshank of the tool. Adjusting nuts located below andabove the blades control the diameter of the reamer.The reamers come with straight (1) or spiral flutes (2),with or without a floating pilot on solid mandrels, and inseveral sizes. Adjustable reamers are also available insets. They are used to enlarge drilled holes to an exacttrue size using a series of small cuts rather than onedeep cut.PIPE REAMERPipe reamers are made of carbon steel. They aretapered with straight or spiral flutes. They come in threesizes, 1/8-inch to l-inch pipe capacity, 1/4-inch to1-1/4-inch pipe capacity, and 1/4-inch to 2-inch pipecapacity. Most pipe reamers are designed to receive aT-handle (1). Others (2) have a tapered square shankfor use with a brace, or a round shank for use with a handdrill. They are used to remove burrs from the insidediameters of pipe and drilled holes.USING A SOLID STRAIGHT-HOLE REAMER1 Secure the work in a vise so that the hole to bereamed is perpendicular to the top of the vise jaws.2Using a tap wrench (1), tighten the handle to thesquare end of the reamer shank (2).CAUTIONDo not turn the wrench counterclockwiseat any time. To do so will cause the reamerto become dull.3Position the reamer (3) at the top of the hole. Turnthe wrench clockwise very slowly until the reamer iscentered in the hole. Straight-hole reamers (4) havea slight taper at the end so they will fit into the holeeasily.39-3
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