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Types and Uses - 14256_79
Using an Adjustable Snap Gage

Tools And Their Uses - Hand tools and what they are used for
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TM 9-243 TYPES AND USES - Continued Gage blocks are available in sets of from 5 to as many as 85  blocks  of  different  dimensions.  Precision  gage  blocks are made from a special alloy steel. They are hardened, ground, and then stabilized over a period of time to reduce subsequent waxing. They are rectangular in shape  with  measuring  surfaces  on  opposite  sides.  The measuring  surfaces  are  lapped  and  polished  to  an  opti- cally flat surface and the distance between them is the measuring dimension. This dimension may range from 0.010 inch up to 20 inches. USING A RING GAGE To check the shank diameter of a pivot stud. 1 Line the stud (1) up with the hole (2) and press in gently. If the stud will not go in, the shank is too large. If it will go in, the stud is not oversize. 2 With the stud in the hole, check the piece for taper and out-of-roundness by sensing any wobble. 3 After checking the part in the GO gage, check it in the NO GO gage. The stud must not enter this gage to establish it as being between the desired limits. NOTE The GO ring gage controls the maximum dimension of a part and NO GO plug gages control the minimum dimension of a hole. Therefore, GO gages control the tightness of fit of mating parts and NO GO gages control the looseness of fit of mat- ing parts. 15-4







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