American machinists' handbook and dictionary of shop terms : a reference book of machine shop and drawing room data, methods and definitions (1914)
Colvin, Fred H. (Fred Herbert), 1867-1965, Stanley, Frank A. (Frank Arthur), b. 1874 · New York : McGraw-Hill book company ; London : Hill · leaf 31
is not so easy, as 5 X 115- = 57i> animpossible gear. Multiplying by 10 would give 60 and 115, notmuch better. Multiply by 6 and get 6 X 6 = 36 and 6 X ni = 69,neither of which is in the set. It seems as though 35 and 70 wouldcome pretty near it, but they will cut a 12 thread instead. To find… … •a u I u u O O SH GEARS FOR SCREW-CUTTING 5 screw. Multiply 75 by 6 = 450 and divide by 40 which gives ii^as the thread that will be cut. Try 45 and 80. 6 X 80 = 480;divided by 45 = lof, showing that the 40 and 75 are nearest and• that to cut it exactly a special gear will have to be added to the…
Machine-shop practice
Internet Archive · UMass Dartmouth, Claire T. Carney Library · Public Domain Mark 1.0. Free to use for anything.
