. Electric railway journal . Fig. 2—Test Pieces Used Figure 2 shows the test pieces before and after they wererun through the gear mesh, and they are numbered inthe order in which the tests are described. Figure3 shows the effect of passing a piece of J/j-inch squaretool steel through the mesh of an untreated cast steelgear and untreated forged steel pinion, and Figure 4shows a B. P. Gear and Pinion after all of the followingtests: Test piece. 1 /4 Round hot rolled steel. Test piece flattened and pressed to fit between teeth. 2 /4 Round cold rolled steel. Test piece flattened, as shown. 3 Roun
. Electric railway journal . Fig. 2—Test Pieces Used Figure 2 shows the test pieces before and after they wererun through the gear mesh, and they are numbered inthe order in which the tests are described. Figure3 shows the effect of passing a piece of J/j-inch squaretool steel through the mesh of an untreated cast steelgear and untreated forged steel pinion, and Figure 4shows a B. P. Gear and Pinion after all of the followingtests: Test piece. 1 /4 Round hot rolled steel. Test piece flattened and pressed to fit between teeth. 2 /4 Round cold rolled steel. Test piece flattened, as shown. 3 Round cold rolled steel. flattened, mashed and broken. 4 J/2 Round cold rolled steel. Test piece flattened, and broken in pieces. 5 Square cold rolled steel bent L shape, passed through parallel to teeth 2 from endof teeth. Test piece broken. 6- y^ Square tool steel, bent L shape, waterquenched and passed through as in 5. Testpiece broken. Gear teeth slightly burred. 7 % Square tool steel. Test piece dis-torted and chipped. 8 Y2. Square tool steel. See 8, Figure 2. Teeth of gearing slightly burred, but abso-lutely undamaged. See Figure 4. This is unquestionable proof of the strengthand toughness of B. P. Gearing, and in additionwe guarantee it to have three and one-half timesthe wearing life of untreated cast steel. Sendfor Bulletin I 7, or send a trial order subject tothis guarantee. Untreated SteelFig. 3 B. P. Gear and Pinion after testF
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