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Chapter 9 Miscellaneous Measuring Tools
Using Miscellaneous Measuring Tools

Tools And Their Uses - Hand tools and what they are used for
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TM 9-243 TYPES AND USES ADJUSTABLE  PARALLEL Adjustable parallels consist of two tapered parts fitted together.  The  distance  between  the  two  outside  parallel surfaces varies by moving mating parts together or apart. This distance is then measured with a microme- ter. Adjustable parallels are used as gages for leveling and setup work. Adjustable parallels are available in various sizes depending on the nature of work. V-BLOCK  AND  CLAMP The V-block and clamp assembly consists of a V-shaped, hardened steel body to support round, square, or rectangular shaped work. A clamp (or clamps) holds the work firmly in the body groove. V-blocks and clamps are especially used for grinding, milling, or drilling purposes. Various styles and designs of V-blocks and clamps are available depending on application. ANGLE  PLATES Angle plates are devices consisting of two flat outside working surfaces jointed at right angles. The outside work  surfaces  are  precision  ground.  The  standard  angle plate is permanently jointed at a right angle. However, an adjustable type with varying angle adjustments is also available. Angle plates are used for clamping or holding work vertically. They are also used for layout, inspection,  or  machine  set-up.  Various  sizes  and designs are available depending on the task. MAGNETIC  BASE  INDICATOR  HOLDER The  magnetic  base  indicator  holder  is  a  one-piece  metal assembly that attaches to the work surface magneti- cally. A gage or indicator attaches to the assembly. Base indicator holders are used for attaching gages to lathes, milling machines, shapers, or any machine where graduations are difficult to read. Magnetic base indicator holders are available in many sizes and designs  depending  on  application. REGISTERING  SPEED  INDICATORS Registering  speed  indicators  are  designed  to  count  the number of revolutions of wheels, shafts, etc. Revolu- tions  are  counted  by  attaching  spindle  of  speed  indicator to hub of shaft or wheel. Indicator spindle will turn in either direction counting each revolution on a circular dial. Various designs of speed indicators are available depending on nature of use. 9-2







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