CHECKING GEAR SIZES Table 1. Checking External Spur Gear Sizes Machinery's Handbook, 31st Edition
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by Measurement Over Wires EVEN 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. 1.728 Wire or pin diameter = Diametral Pitch No. of Teeth Pressure Angle 14 1 ∕ 2 ° 17 1 ∕ 2 ° 20 ° 25 ° 30 ° 90 92.5076 92.4633 92.4437 92.4357 92.4546 92 94.5085 94.4639 94.4441 94.4359 94.4548 94 96.5094 96.4644 96.4445 96.4362 96.4550 96 98.5102 98.4649 98.4449 98.4364 98.4552 98 100.5110 100.4655 100.4453 100.4367 100.4554 100 102.5118 102.4660 102.4456 102.4369 102.4555 102 104.5125 104.4665 104.4460 104.4370 104.4557 104 106.5132 106.4669 106.4463 106.4372 106.4558 106 108.5139 108.4673 108.4466 108.4374 108.4560 108 110.5146 110.4678 110.4469 110.4376 110.4561 110 112.5152 112.4682 112.4472 112.4378 112.4562 112 114.5159 114.4686 114.4475 114.4380 114.4563 114 116.5165 116.4690 116.4478 116.4382 116.4564 116 118.5171 118.4693 118.4481 118.4384 118.4565 118 120.5177 120.4697 120.4484 120.4385 120.4566 120 122.5182 122.4701 122.4486 122.4387 122.4567 122 124.5188 124.4704 124.4489 124.4388 124.4568 124 126.5193 126.4708 126.4491 126.4390 126.4569 126 128.5198 128.4711 128.4493 128.4391 128.4570 128 130.5203 130.4714 130.4496 130.4393 130.4571 130 132.5208 132.4717 132.4498 132.4394 132.4572 132 134.5213 134.4720 134.4500 134.4395 134.4573 134 136.5217 136.4723 136.4502 136.4397 136.4574 136 138.5221 138.4725 138.4504 138.4398 138.4575 138 140.5226 140.4728 140.4506 140.4399 140.4576 140 142.5230 142.4730 142.4508 142.4400 142.4577 142 144.5234 144.4733 144.4510 144.4401 144.4578 144 146.5238 146.4736 146.4512 146.4402 146.4578 146 148.5242 148.4738 148.4513 148.4403 148.4579 148 150.5246 150.4740 150.4515 150.4404 150.4580 150 152.5250 152.4742 152.4516 152.4405 152.4580 152 154.5254 154.4745 154.4518 154.4406 154.4581 154 156.5257 156.4747 156.4520 156.4407 156.4581 156 158.5261 158.4749 158.4521 158.4408 158.4582 158 160.5264 160.4751 160.4523 160.4409 160.4582 160 162.5267 162.4753 162.4524 162.4410 162.4583 162 164.5270 164.4755 164.4526 164.4411 164.4584 164 166.5273 166.4757 166.4527 166.4411 166.4584 166 168.5276 168.4759 168.4528 168.4412 168.4585 168 170.5279 170.4760 170.4529 170.4413 170.4585 170 172.5282 172.4761 172.4531 172.4414 172.4586 180 182.5297 182.4771 182.4537 182.4418 182.4589 190 192.5310 192.4780 192.4542 192.4421 192.4591 200 202.5321 202.4786 202.4548 202.4424 202.4593 300 302.5395 302.4831 302.4579 302.4443 302.4606 400 402.5434 402.4854 402.4596 402.4453 402.4613 500 502.5458 502.4868 502.4606 502.4458 502.4619 Table 1. (Continued) Checking External Spur Gear Sizes
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