Lesson 4/Learning Event
GAGE USES
Thickness (Feeler)
Thickness (feeler) gages are used in one of two ways, as a means for
determining a measure or as a means for adjusting to a definite limit.
Figure 55, Part A, shows a thickness gage being used to check piston ring
gap clearance in a cylinder bore. A long blade thickness gage is being used
to determine the fit between large mating surfaces in Figure 55, Part B. By
combining blades, it is possible to measure a wide variation of thicknesses.
FIGURE 55.
USING THICKNESS (FEELER) GAGES
Wire and Drill
The use of a drill gage is illustrated in Figure 56, Part A. The size of a
drill is being determined. The drill size or number and decimal size are
stamped on the gage beside each hole.
A chart on the gage indicates the
correct size of drill to use for a given tap size. To determine the size of
both sheet stock and wire, you can use the wire gage shown in Figure 56,
Part B.
FIGURE 56.
USING DRILL AND WIRE GAGES (PARTS A AND B)
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