Threads and Threading - Sportpilot.info
Threads and Threading - Sportpilot.info
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Table 8b. Limiting Dimensions of American National St<strong>and</strong>ard Centralizing Acme Single-Start Screw <strong>Threads</strong>,<br />
Classes 2C, 3C, <strong>and</strong> 4C ASME/ANSI B1.5-1988<br />
Nominal Diameter, D<br />
1 ⁄2<br />
5 ⁄8<br />
3 ⁄4<br />
7 ⁄8 1 1 1 ⁄8 1 1 ⁄ 4 1 3 ⁄ 8 1 1 ⁄ 2<br />
<strong>Threads</strong> per Inch a 10 8 6 6 5 5 5 4 4<br />
Limiting Diameters External <strong>Threads</strong><br />
Classes 2C, 3C, <strong>and</strong> 4C, Major Diameter Max 0.5000 0.6250 0.7500 0.8750 1.0000 1.1250 1.2500 1.3750 1.5000<br />
Class 2C, Major Diameter Min 0.4975 0.6222 0.7470 0.8717 0.9965 1.1213 1.2461 1.3709 1.4957<br />
Class 3C, Major Diameter Min 0.4989 0.6238 0.7487 0.8736 0.9985 1.1234 1.2483 1.3732 1.4982<br />
Class 4C, Major Diameter Min 0.4993 0.6242 0.7491 0.8741 0.9990 1.1239 1.2489 1.3738 1.4988<br />
Classes 2C, 3C, <strong>and</strong> 4C, Minor Diameter Max 0.3800 0.4800 0.5633 0.6883 0.7800 0.9050 1.0300 1.1050 1.2300<br />
Class 2C, Minor Diameter Min 0.3594 0.4570 0.5371 0.6615 0.7509 0.8753 0.9998 1.0719 1.1965<br />
Class 3C, Minor Diameter Min 0.3704 0.4693 0.5511 0.6758 0.7664 0.8912 1.0159 1.0896 1.2144<br />
Class 4C, Minor Diameter Min 0.3731 0.4723 0.5546 0.6794 0.7703 0.8951 1.0199 1.0940 1.2188<br />
Class 2C, Pitch Diameter {<br />
Max<br />
Min<br />
0.4443<br />
0.4306<br />
0.5562<br />
0.5408<br />
0.6598<br />
0.6424<br />
0.7842<br />
0.7663<br />
0.8920<br />
0.8726<br />
1.0165<br />
0.9967<br />
1.1411<br />
1.1210<br />
1.2406<br />
1.2186<br />
1.3652<br />
1.3429<br />
Class 3C, Pitch Diameter {<br />
Max<br />
Min<br />
0.4458<br />
0.4394<br />
0.5578<br />
0.5506<br />
0.6615<br />
0.6534<br />
0.7861<br />
0.7778<br />
0.8940<br />
0.8849<br />
1.0186<br />
1.0094<br />
1.1433<br />
1.1339<br />
1.2430<br />
1.2327<br />
1.3677<br />
1.3573<br />
Class 4C, Pitch Diameter {<br />
Max<br />
Min<br />
0.4472<br />
0.4426<br />
0.5593<br />
0.5542<br />
0.6632<br />
0.6574<br />
0.7880<br />
0.7820<br />
0.8960<br />
0.8895<br />
Internal <strong>Threads</strong><br />
1.0208<br />
1.0142<br />
1.1455<br />
1.1388<br />
1.2453<br />
1.2380<br />
1.3701<br />
1.3627<br />
Classes 2C, 3C, <strong>and</strong> 4C, Major Diameter Min 0.5007 0.6258 0.7509 0.8759 1.0010 1.1261 1.2511 1.3762 1.5012<br />
Classes 2C <strong>and</strong> 3C, Major Diameter Max 0.5032 0.6286 0.7539 0.8792 1.0045 1.1298 1.2550 1.3803 1.5055<br />
Class 4C, Major Diameter Max 0.5021 0.6274 0.7526 0.8778 1.0030 0.1282 1.2533 1.3785 1.5036<br />
Classes 2C, 3C, <strong>and</strong> 4C,<br />
Minor Diameter {<br />
Class 2C, Pitch Diameter {<br />
Class 3C, Pitch Diameter {<br />
Class 4C, Pitch Diameter {<br />
Machinery's H<strong>and</strong>book 27th Edition<br />
Min 0.4100 0.5125 0.6000 0.7250 0.8200 0.9450 0.0700 1.1500 1.2750<br />
Max 0.04150 0.5187 0.6083 0.7333 0.8300 0.9550 1.0800 1.1625 1.2875<br />
Min 0.4500 0.5625 0.6667 0.7917 0.9000 1.0250 1.1500 1.2500 1.3750<br />
Max 0.4637 0.5779 0.6841 0.8096 0.9194 1.0448 1.1701 1.2720 1.3973<br />
Min 0.4500 0.5625 0.6667 0.7917 0.9000 1.0250 1.1500 1.2500 1.3750<br />
Max 0.4564 0.5697 0.6748 0.8000 0.9091 1.0342 1.1594 1.2603 1.3854<br />
Min 0.4500 0.5625 0.6667 0.7917 0.9000 1.0250 1.1500 1.2500 1.3750<br />
Max 0.4546 0.5676 0.6725 0.7977 0.9065 1.0316 1.1567 1.2573 1.3824<br />
Copyright 2004, Industrial Press, Inc., New York, NY<br />
1838<br />
CENTRALIZING ACME SCREW THREADS
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