Drill Size = Major Diameter - (.975 divided by the number of threads per inch). For example, with a 1/4-32 tap, .250 - .0305 = .2195 (7/32 or #2 drill size). Metric tap drill sizes are the diameter minus the pitch (For example, 42mm x 1.5 tap uses a 40.5 drill). Follow these links to browse our taps and die selection:
It is easy to construct a concave figure if the figure has at least 4 sides Just make sure that one interior angle is bigger than 180 degrees. In other words, an interior angle should be a reflex angle Why am I saying at least 4 sides? It is possible to make a concave triangle? The answer is no! Since the sum of the interior angles in any triangle must add up to 180 degrees, no interior angles can be more than 180. It is impossible! Buy a comprehensive geometric formulas ebook.
From one of the vertices drop a perpendicular to the opposite side dividing that side in two lengths each of length 1 unit. The perpendicular is of length sqrt{2^2 - 1^2} = sqrt{4-1} = sqrt{3} The perpendicular bisector divides the 60 degree angle into two equal angles each of 30 degrees.We now have a triangle of 30, 60, 90 degrees with corresponding opposite sides of 1 unit, sqrt{3} units, 2 units respectively.he hypotenuse will in such a case be sqrt{1^2 + 1^2} = sqrt{1+1} = sqrt{2}. Sine(45) = Opposite Side/Hypotenuse = 1/[sqrt(2)] Cosine(45) = Adjacent Side/Hypotenuse = 1/[sqrt(2)] Tangent(45) = Opposite Side/Hypotenuse = 1/1 = 1 As regards the 30 and 60 degrees: Consider an equilateral triangle of side 2 unit each side.