326
Brown & Sharpe Mfg. Co.
TABLE FOR OBTAINING SET-OVER FOR CUTTING BEVEL GEARS
RATIO OF APEX DISTANCE TO WIDTH OF FACE =APEXFACE
No. of Cutter | 3 1 |
33⁄4 1 |
31⁄2 1 |
33⁄4 1 |
4 1 |
41⁄4 1 |
41⁄2 1 |
43⁄4 1 |
5 1 |
51⁄2 1 |
6 1 |
7 1 |
8 1 |
1 | .254 | .254 | .255 | .256 | .257 | .257 | .257 | .258 | .258 | .259 | .260 | .262 | .264 |
2 | .266 | .268 | .271 | .272 | .273 | .274 | .274 | .275 | .277 | .279 | .280 | .283 | .284 |
3 | .266 | .268 | .271 | .273 | .275 | .278 | .280 | .282 | .283 | .286 | .287 | .290 | .292 |
4 | .275 | .280 | .285 | .287 | .291 | .293 | .296 | .298 | .298 | .302 | .305 | .308 | .311 |
5 | .280 | .285 | .290 | .293 | .295 | .296 | .298 | .300 | .302 | .307 | .309 | .313 | .315 |
6 | .311 | .318 | .323 | .328 | .330 | .334 | .337 | .340 | .343 | .348 | .352 | .356 | .362 |
7 | .289 | .298 | .308 | .316 | .324 | .329 | .334 | .338 | .343 | .350 | .360 | .370 | .376 |
8 | .275 | .286 | .296 | .309 | .319 | .331 | .338 | .344 | .352 | .361 | .368 | .380 | .386 |
TABLE OF CUTTERS, PITCHES, GEARS AND ANGLES FOR TWIST DRILLS
Diameter of Drill | Thickness of cutter | Pitch in Inches | Gear on Worm | First Gear on Stud | Second Gear on Stud | Gear on Screw | Angle of Spiral |
---|---|---|---|---|---|---|---|
116 | .06 | .67 | 24 | 86 | 24 | 100 | 16° 20′ |
18 | .08 | 1.12 | 24 | 86 | 40 | 100 | 19° 20’ |
316 | .11 | 1.67 | 24 | 64 | 32 | 72 | 19° 25′ |
14 | .15 | 1.94 | 32 | 64 | 28 | 72 | 21° |
516 | .19 | 2.92 | 24 | 64 | 56 | 72 | 20° |
38 | .23 | 3.24 | 40 | 48 | 28 | 72 | 21° |
716 | .27 | 3.89 | 56 | 48 | 24 | 72 | 20° 10′ |
12 | .31 | 4.17 | 40 | 72 | 48 | 64 | 20° 30′ |
916 | .35 | 4.86 | 40 | 64 | 56 | 72 | 20° |
58 | .39 | 5.33 | 48 | 40 | 32 | 72 | 20° 12′ |
1116 | .44 | 6.12 | 56 | 40 | 28 | 64 | 19° 30′ |
34 | .50 | 6.48 | 56 | 48 | 40 | 72 | 20° ((phantom|00}} |
1316 | .56 | 7.29 | 56 | 48 | 32 | 56 | 19° 20′ |
78 | .62 | 7.62 | 64 | 48 | 32 | 56 | 19° 50′ |
1516 | .70 | 8.33 | 48 | 32 | 40 | 72 | 19° 30′ |
1 | .77 | 8.95 | 86 | 48 | 28 | 56 | 19° 20′ |
118 | .85 | 9.33 | 56 | 40 | 48 | 72 | 20° 40′ |