The Gasoline Automobile : Its Design And Construction
The Gasoline Automobile : Its Design And Construction
Peter Martin Heldt
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Besides, the cutting of bevel gears involves much greater difficulty than the cutting of spur gears. The stock- ing or rough cutting can be done by means of a formed Digitized by Google 262 BEVEL GEAR DRIVE AND REAR AXLE. cutter in a milling machine or gear cutter of similar type, as shown in Fig. 172, but the finishing should preferably be done in a bevel gear planer, as this insures greater accuracy. The bevel gears must also be case hardened or oil hardened, and to correct the defects due to... warping when the gears are quenched, the latter are often run together in a special fix- ture with a mixture of emery and oil. Fig. 173 illustrates Fig. T72.— Stocking Bevel Gears in Packard Plant. Digitized by Google BEVEL GEAR DRIVE AND REAR AXLE. 263 the process of grinding the gears in the plant of the Timken- Detroit Axle Co. by means of a machine developed in the company's own shop. The bevel pinion and gear are mounted- on spindles at right angles to each other. The spindle on which the pinion is mounted is driven by belt from a countershaft and the other spindle through a pair of accurately cut bevel gears of the same ratio as the pair to be ground.
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