CHECKING GEAR SIZES Table 2. Checking External Spur Gear Sizes by Measurement Over Wires ODD NUMBERS OF TEETH Dimensions in table are for 1 diametral pitch and Van Keuren standard wire sizes. For any other diametral pitch, divide dimension in table by given pitch. Wire or pin diameter Diametral Pitch 1.728 = No. of Teeth Pressure Angle 14 1 ∕ 2 ° 17 1 ∕ 2 ° 20 ° 25 ° 30 ° 95 97.4967 97.4516 97.4317 97.4232 97.4420 97 99.4978 99.4524 99.4323 99.4237 99.4424 99 101.4988 101.4532 101.4329 101.4242 101.4428 101 103.4998 103.4540 103.4335 103.4247 103.4432 103 105.5008 105.4546 105.4341 105.4252 105.4436 105 107.5017 107.4553 107.4346 107.4256 107.4440 107 109.5026 109.4559 109.4352 109.4260 109.4443 109 111.5035 111.4566 111.4357 111.4264 111.4447 111 113.5044 113.4572 113.4362 113.4268 113.4450 113 115.5052 115.4578 115.4367 115.4272 115.4453 115 117.5060 117.4584 117.4372 117.4275 117.4456 117 119.5068 119.4589 119.4376 119.4279 119.4459 119 121.5075 121.4594 121.4380 121.4282 121.4462 121 123.5082 123.4599 123.4384 123.4285 123.4465 123 125.5089 125.4604 125.4388 125.4288 125.4468 125 127.5096 127.4609 127.4392 127.4291 127.4471 127 129.5103 129.4614 129.4396 129.4294 129.4473 129 131.5109 131.4619 131.4400 131.4297 131.4476 131 133.5115 133.4623 133.4404 133.4300 133.4478 133 135.5121 135.4628 135.4408 135.4302 135.4480 135 137.5127 137.4632 137.4411 137.4305 137.4483 137 139.5133 139.4636 139.4414 139.4307 139.4485 139 141.5139 141.4640 141.4418 141.4310 141.4487 141 143.5144 143.4644 143.4421 143.4312 143.4489 143 145.5149 145.4648 145.4424 145.4315 145.4491 145 147.5154 147.4651 147.4427 147.4317 147.4493 147 149.5159 149.4655 149.4430 149.4319 149.4495 149 151.5164 151.4658 151.4433 151.4321 151.4497 151 153.5169 153.4661 153.4435 153.4323 153.4498 153 155.5174 155.4665 155.4438 155.4325 155.4500 155 157.5179 157.4668 157.4440 157.4327 157.4502 157 159.5183 159.4671 159.4443 159.4329 159.4504 159 161.5188 161.4674 161.4445 161.4331 161.4505 161 163.5192 163.4677 163.4448 163.4333 163.4507 163 165.5196 165.4680 165.4450 165.4335 165.4508 165 167.5200 167.4683 167.4453 167.4337 167.4510 167 169.5204 169.4686 169.4455 169.4338 169.4511 169 171.5208 171.4688 171.4457 171.4340 171.4513 171 173.5212 173.4691 173.4459 173.4342 173.4514 181 183.5230 183.4704 183.4469 183.4350 183.4520 191 193.5246 193.4715 193.4478 193.4357 193.4526 201 203.5260 203.4725 203.4487 203.4363 203.4532 301 303.5355 303.4790 303.4538 303.4402 303.4565 401 403.5404 403.4823 403.4565 403.4422 403.4582 501 503.5433 503.4843 503.4581 503.4434 503.4592 Table 2. (Continued) Checking External Spur Gear Sizes Machinery's Handbook, 31st Edition
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