Downloaded from https://www.everyspec.com 74 r' 74 A. MAX. ECCENTRICITY B. MAX. COCKING EFFECT MAXIMUM METAL CONSITIONS .002 07 .487 C. MAX. ECCENTRICITY 70SEE FIG.5-25 D. MAX. COCKING EFFECT MINIMUM METAL CONDITIONS Figure 5-24. Affect of variatim in size on locatlonal tolenmace not be used where good seating is required, such examine the drawings, determine the tunctions as in the case shown below infigure 5-26a. The of the various components, and decide the real requirement should be shown as in figure 5-26b. requirements that will be incorporated in the 5-26. Centrality of Holes.
An important appli- cation of the dependent locational tolerance sym- bol to indicate a centrality requirement is in the dimensioning of holes drilled radially in a cy- lindrical piece. Figure 5-27 shows an implied requirement that the small hole be located ra- dially, that is, the centerline of the small hole will intersect the centerline of the longitudinal hole. However, the requirement is only implied by the drawing, it is not stated. The only stated - " requirements are that the small hole be 0.200 *0.002 in diameter, and located longitudinally 0.600 ±0.001 from the seating face. The im- plied requirement is that the small hole be i drilled as shown at position 1.
However, if the hole is drilled at position 2, it will still meet the stated requirements as to location and di- ameter. When requirements on a drawing are implied Figure 5-25, Cockbg caused by tAreads instead of stated, the gage engineer must bitdfiq beforefull seattq 5-22