What is the diameter of the bosses What is the tolerance on

What is the diameter of the bosses? What is the tolerance on the holes in the bosses? What are the width and height of the cutouts in the sides of the box? What are the width and depth of the legs of the box? How many degrees are there between the legs of the box? What is the maximum surface roughness in microinches permitted on the machined surfaces? How many surfaces are machined? What would be the inside diameter of the mating part that this box fits into? If the mating part is .44 thick and a lockwasher is used, what diameter and longest standard length of socket head cap screws could be used to fasten the parts together? (see tables 7 and 12 in Appendix) Lengths available in .25 in. increments What is the thickness of the side walls of the box, the top of the box, and the bottom the box? Disregard the bosses. Give normal inside dimensions of the box. What are the overall outside dimensions of the box? (Do not include legs or bosses) Of what material Is the box made? How many screws are required to fasten the box to the mating part? What is the tap drill size required for the four threaded holes?

Solution

Solution:

(1) Diameter of Boss : 1.24 in.

(2) Tolerance on the holes in bosses : 0.003 in

(3) Width and height of cutouts : (0.9 + 1.10) x (0.5 + 1.75) = 2 in x 2.25 in

(4) Width and depth of legs : 0.8 in x 3.40 in

(5) Degrees between the legs : 80 ^o

(6) Surface roughness maximum : Machined 125

(7) Machined surfaces : 6 (count the surface on which roughness symbols are applicable. Note the leg surface are 2 in number)

(8) It would be the outside diameter of the boss, that is, 1.24 in.

(9) Appendix tables not available in picture.

(10) (A) (3.40 - (1.24+1.75)) = 0.41 in (B) 0.30 in (C) 0.40 in