The machinist and tool maker's instructor, containing an easy method of calculating and laying out difficult work in the machine shop .. (1896)
Genung, Edward. [from old catalog] · New York [Press of J. B. Savage, Cleveland] · leaf 58
1 6° 10 , i \ 1 • .s :*°\ J 4^*9 36 | 3ii j w _ . M.. i … 54 THE MACHINIST AND TOOL MAKERS INSTRUCTOR. in this case (Figure 44) that one-half of the circumference ofboth center steps ought to be exactly .125 of an inch longer, or.250 in the whole circumference greater than shown in thefigure. Thus, the circumference Of 6/7 = 18.849, and adding.250 we have…
Machinery
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
