Downloaded from https://www.everyspec.com 1.750 B i MAX. RADIUS MAX. ANGLE +.00 AD. I.OOO B MIN. ANGLE A B Figure 5-2M. Application of basic anlar and radiat dimensionig contractor receives the full extent of the tol- The dependent locational tolerance should not erance zone. The use of the dependent locational be applied to a part without consideration of the tolerance will result in round tolerance zones implications. Only the effect of lack of per- benefiting both the producer and the gage de- pendicularity is included, both in the dependent signer. and the independent tolerance applications to this part.
In both cases the lack of perpen- Figure 28 of Drawing 30-1-7 shows a dependent dicularity is the amount of cocking permitted as a result of play of the mating threads. A locatlonal tolerance applied to the same part separate perpendicularity requirement should shown in figure 16 (of the same drawing) with an be used when the degree of contact between independent tolerance. It will be noted that with seating surfaces is important. In figure 26 the independent tolerance the total variation was (Drawing 30-1-7) there is no requirement that 0,N94.
With the dependent tolerance, the func- surface R shall seat 360 degrees on the gage tional tolerance increases from 0.004 for maxi- mum metal conditions to 0.006 with minimum plug. It might only seat 5 degrees, and if the mthreads were a close fit, the gage might still metal conditions. I the part i produced toe , h ih i minimum permissible size, the clearance be- accept the part.
Figure 5-c5, which is an on- tween the part and receiver willb entri explains why the gage may accept a part when This condition will permit greater eccentricity the lack of perpendicularity is greater than the and/or cocking effect due to lack of perpendi- cularity between surface R and the thread when apparent effort. surface R makes up against the slider plug of the gage.
Figure 5-24 shows the eccentricity The dependent symbol shown in figure 26 of and cocking permissible when metal conditions Drawing 30-1-7 is particularly applicable to are maximum, while C and D show the same mating parts that after assembly must fit into a conditions when metal conditions are minimum, third component or into a chamber. It should 5