Notes on technical sketching and free hand lettering for engineering students (1912)
Smith, Alton Lincoln, 1867- [from old catalog] · Worcester, Mass., The author · leaf 54
chinist will need the outside diameter, the backing, angle of the edge, faceangle, face of blank. For cutting teeth, he will need the number, kind and pitch of teeth, the number ofteeth which determines the cutter and the cutting angle. Srur Gear Rack ,0/^£~C./.- f ALL OyS^/Ji-ZSV/vyOL. OAf£-C./.-f… … 52 WORM GEARING FIG. 18 143. If the teeth on a spur gear are turned slightly so their angle agrees with the thread angle ofa screw having the same circular or linear pitch, the two will work together properly and constitute asimple form of Worm Gearing. The thread section of the worm is made like a…
Mechanical drawing · Lettering
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