Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc . 21 SHEET BAR d SLAB MILL- STEAM FLYINGSHEAR TABLE-BEVEL GEARS FOR ROLLS 5CALE ^- I ^^^^ CONTRACT 5HAP0H CO. \ DATE 3-12-18 \ DR. ^ 7^ TR. ^e L FROM MORGAN CONSTRUCTION CO. WORCESTER. MASS. g 23162 ^i^. BLUEPRINT READING 43 not fail to observe that the gear teeth are 20 degrees involuteinstead of the ordinary 14| degrees, also that the pitch of theteeth is gi
Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc . 21 SHEET BAR d SLAB MILL- STEAM FLYINGSHEAR TABLE-BEVEL GEARS FOR ROLLS 5CALE ^- I ^^^^ CONTRACT 5HAP0H CO. \ DATE 3-12-18 \ DR. ^ 7^ TR. ^e L FROM MORGAN CONSTRUCTION CO. WORCESTER. MASS. g 23162 ^i^. BLUEPRINT READING 43 not fail to observe that the gear teeth are 20 degrees involuteinstead of the ordinary 14| degrees, also that the pitch of theteeth is given as circular pitch instead of the more commondiameter pitch. Circular pitch is the distance from the centerline of a tooth to the center line of the next tooth and is measuredalong the pitch circle. In bevel gearing, it is measured at thelargest pitch diameter. The machinist, after carefully reading the lettered notes, isnext concerned with the holes through the hubs of the gear and ofthe pinion. He will note that the gear is to be forced onto itsshaft with a pressure of 15 tons and that in the pinion the holeshould be a tight fit on the shaft. He will also observe that eachkeyway is to taper at the rate of f inch per foot. The machin-ists next concern is the outside diameters of the gear and of thepinion. By following the extension lines to their dimension lineshe learns that the gear is inches and the pinion inc
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmechanicaldrawing
