TM 9-243TYPES AND USES - ContinuedThe following scales or inch divisions are found on thecarpenter’s square:Face of bodyoutside edgeinches and sixteenthsFace of bodyinside edgeinches and eighthsFace of tongueoutside edgeinches and sixteenthsFace of tongueinside edgeinches and eighthsBack of bodyoutside edgeinches and twelfthsBack of bodyinside edgeinches and sixteenthsBack of tongueoutside edgeinches and twelfthsBack of tongueinside edgeinches and tenthsTRY SQUAREThe try square is made of a steel or wood stock (1) and ablade (2). The blade is from 2 to 12 inches long and isgraduated in eighths. The try square is used to set orcheck lines which are at right angles (90 degrees) toeach other.COMBINATION SQUAREThe combination square is made up of the followingcomponents:1.A slotted 12-inch stainless steel rule (1) which isgraduated in eighths, sixteenths, thirty-seconds,and sixty-fourths of an inch. It can be used as ameasuring scale by itself or with any one of thefollowing components.2.The center head (2) when attached to the rule,bisects a 90 degree angle. It’s used for determiningthe center of cylindrical work.3.The protractor (3) has a level (4) and a revolvingturret (5) which is graduated in degrees from 0 to180 or 0 to 90 in either direction. It is used to lay outand measure angles to within one degree.4.The square head (6) has a level (7), a scribe (8), and45 degree (9) and 90 degree sides (10). It is used tolay out 45 and 90 degree angles and to check level.It may also be used as a height or depth gage.13-3
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