MACHINE SHOP CALCULATION - OD1640 - LESSON 2/TASK 3
The angle at D in each triangle has a value of 32,,
30'(one-half the value of 65,,), shown in figure 26, view A, on
the previous page.
Thus, the line DB (from the center of the plug to the vertex) is
opposite side ƒ sine. Thus:
Subtract the height of the slot from the height of the block to
get the dimension "Y." Thus 1.500 - 1.100 = .400.
Add the values line DB (hypotenuse), .9305788 inch, .400 inch
(the distance of "Y"), and .5 inch, the radius of the circle
(plug), as follows:
Value of hypotenuse
Distance of "Y"
Radius of circle
Thus, the value of X is:
Law of Sines
In the oblique triangle shown in figure 27, view A, on page 83, h is
perpendicular to AB.
Divide (1) by (2):