Threads and Threading - Sportpilot.info

More documents

Recommendations

Info

1818 BRITISH STANDARD ISO METRIC SCREW THREADS position, capital for nuts, lower case for bolts. If the two class designations for a thread are the same (one for the pitch diameter and one for the crest diameter), it is not necessary to repeat the symbols. As examples, a bolt thread designated M10-6g signifies a thread of 10 mm nominal diameter in the Coarse Thread Series having a tolerance class 6g for both pitch and major diameters. A designation M10 × 1-5g6g signifies a bolt thread of 10 mm nominal diameter having a pitch of 1 mm, a tolerance class 5g for pitch diameter, and a tolerance class 6g for major diameter. A designation M10-6H signifies a nut thread of 10 mm diameter in the Coarse Thread Series having a tolerance class 6H for both pitch and minor diameters. 30° 30° ;;;;;; ;;;;;; ;;;;;; Nut (Internal Thread) H H/4 H/4 90° Bolt (External Thread) 5/8 H H H/4 P/8 P/2 Axis of nut P H/8 P/4 5/8 H 3/8 H 30° ;;;;;; ;;;;;; ;;;;;; 90° Machinery's Handbook 27th Edition H/8 P Axis of bolt P/2 In practice the root is rounded and cleared beyond a width of P/8 Pitch line In practice the root is rounded and cleared beyond a width of P/8 Pitch line Fig. 3. Maximum Material Profiles for Internal and External Threads A fit between mating parts is indicated by the nut thread tolerance class followed by the bolt thread tolerance class separated by an oblique stroke. Examples: M6-6H/6g and M20 × 2-6H/5g6g. For coated threads, the tolerances apply to the parts before coating, unless otherwise specified. After coating, the actual thread profile shall not at any point exceed the maximum material limits for either tolerance position H or h. Fundamental Deviation Formulas.—The formulas used to calculate the fundamental deviations in Table 2 are: EI G = + (15 + 11P) EI H =0 es e =−(50 + 11P) except for threads with P ≤ 0.45 mm es f =−(30 + 11P) es g =−(15 + 11P) es h =0 In these formulas, EI and es are expressed in micrometers and P is in millimeters. P P/8 P/8 Copyright 2004, Industrial Press, Inc., New York, NY
BRITISH STANDARD ISO METRIC SCREW THREADS 1819 Crest Diameter Tolerance Formulas.—The tolerances for the major diameter of bolt threads (T d), grade 6, in Table 5, were calculated from the formula: In this formula, T d (6) is in micrometers and P is in millimeters. For tolerance grades 4 and 8: T d (4) = 0.63 T d (6) and T d (8) = 1.6 T d (6), respectively. The tolerances for the minor diameter of nut threads (T D1 ), grade 6, in Table 5, were calculated as follows: For pitches 0.2 to 0.8 mm, T D1 (6) = 433P − 190P 1.22 . For pitches 1 mm and coarser, T D1 (6) = 230P 0.7 . In these formulas, T D1 (6) is in micrometers and P is in millimeters. For tolerance grades 4, 5, 7, and 8: T D1 (4) = 0.63 T D1 (6); T D1 (5) = 0.8 T D1 (6); T D1 (7) = 1.25 T D1 (6); and T D1 (8) = 1.6 T D1 (6), respectively. Nominal Diametera 1 1.1 1.2 1.4 1.6 1.8 2 2.2 Coarse 0.25 0.25 0.25 0.3 0.35 0.35 0.4 0.45 Table 5. British Standard ISO Metric Screw Threads: Limits and Tolerances for Finished Uncoated Threads for Normal Lengths of Engagement BS 3643: Part 2: 1981 Pitch External Threads (Bolts) Internal Threads (Nuts) b Fine Tol. Class Machinery's Handbook 27th Edition Td( 6) 180 P2 3 3.15 = – --------- P Major Dia. Pitch Dia. Minor Dia Fund dev. Max Tol(−) Max Tol(−) Min Min Max Tol(−) Max Tol(−) 0.2 4h 6g 0 0.017 1.000 0.983 0.036 0.056 0.870 0.853 0.030 0.048 0.717 0.682 4H 1.000 0.910 0.040 0.821 0.038 4h 0 1.000 0.042 0.838 0.034 0.649 4H 1.000 0.883 0.045 0.774 0.045 6g 0.018 0.982 0.067 0.820 0.053 0.613 5H 1.000 0.894 0.056 0.785 0.056 0.2 4h 6g 0 0.017 1.100 1.083 0.036 0.056 0.970 0.953 0.030 0.048 0.817 0.782 4H 1.100 1.010 0.040 0.921 0.038 4h 0 1.100 0.042 0.938 0.034 0.750 4H 1.100 0.983 0.045 0.874 0.045 6g 0.018 1.082 0.067 0.920 0.053 0.713 5H 1.100 0.994 0.056 0.885 0.056 0.2 4h 6g 0 0.017 1.200 1.183 0.036 0.056 1.070 1.053 0.030 0.048 0.917 0.882 4H 1.200 1.110 0.040 1.021 0.038 4h 0 1.200 0.042 1.038 0.034 0.850 4H 1.200 1.083 0.045 0.974 0.045 6g 0.018 1.182 0.067 1.020 0.053 0.813 5H 1.200 1.094 0.056 0.985 0.056 0.2 4h 6g 0 0.017 1.400 1.383 0.036 0.056 1.270 1.253 0.030 0.048 1.117 1.082 4H 1.400 1.310 0.040 1.221 0.038 4h 0 1.400 0.048 1.205 0.036 0.984 4H 1.400 1.253 0.048 1.128 0.053 6g 0.018 1.382 0.075 1.187 0.056 0.946 5H 1.400 1.265 0.060 1.142 0.067 6H 1.400 1.280 0.075 1.160 0.085 0.2 4h 6g 0 0.017 1.600 1.583 0.036 0.056 1.470 1.453 0.032 0.050 1.315 1.280 4H 1.600 1.512 0.042 1.421 0.038 4h 0 1.600 0.053 1.373 0.040 1.117 4H 1.600 1.426 0.053 1.284 0.063 6g 0.019 1.581 0.085 1.354 0.063 1.075 5H 1.600 1.440 0.067 1.301 0.080 6H 1.600 1.458 0.085 1.321 0.100 0.2 4h 6g 0 0.017 1.800 1.783 0.036 0.056 1.670 1.653 0.032 0.050 1.515 1.480 4H 1.800 1.712 0.042 1.621 0.038 4h 0 1.800 0.053 1.573 0.040 1.317 4H 1.800 1.626 0.053 1.484 0.063 6g 0.019 1.781 0.085 1.554 0.063 1.275 5H 1.800 1.640 0.067 1.501 0.080 6H 1.800 1.658 0.085 1.521 0.100 4h 0.25 6g 0 0.018 2.000 1.982 0.042 0.067 1.838 1.820 0.036 0.056 1.648 1.610 4H 5H 2.000 2.000 1.886 1.898 0.048 0.060 1.774 1.785 0.045 0.056 4h 0 2.000 0.060 1.740 0.042 1.452 4H 2.000 1.796 0.056 1.638 0.071 6g 0.019 1.981 0.095 1.721 0.067 1.408 5H 2.000 1.811 0.071 1.657 0.090 6H 2.000 1.830 0.090 1.679 0.112 4h 0.25 6g 0 0.018 2.200 2.182 0.042 0.067 2.038 2.020 0.036 0.056 1.848 1.810 4H 5H 2.200 2.200 2.086 2.098 0.048 0.060 1.974 1.985 0.045 0.056 4h 0 2.200 0.063 1.908 0.045 1.585 4H 2.200 1.968 0.060 1.793 0.080 6g 0.020 2.180 0.100 1.888 0.071 1.539 5H 2.200 1.983 0.075 1.813 0.100 6H 2.000 2.003 0.095 1.838 0.125 Tol. Class Major Dia. Pitch Dia. Minor Dia Copyright 2004, Industrial Press, Inc., New York, NY
Page 1 and 2:
SCREW THREAD SYSTEMS 1725 Screw Thr
Page 3 and 4:
Machinery's Handbook 27th Edition O
Page 5 and 6:
Machinery's Handbook 27th Edition T
Page 7 and 8:
SCREW THREADS 1727 ISO Metric Threa
Page 9 and 10:
Machinery's Handbook 27th Edition S
Page 11 and 12:
Machinery's Handbook 27th Edition S
Page 13 and 14:
UNIFIED SCREW THREADS 1733 UN Inter
Page 15 and 16:
Machinery's Handbook 27th Edition U
Page 17 and 18:
Nominal Size, Threads per Inch, and
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Machinery's Handbook 27th Edition U
Page 45 and 46:
UNIFIED SCREW THREADS 1765 Table 4c
Page 47 and 48: Machinery's Handbook 27th Edition U
Page 49 and 50: UNIFIED SCREW THREADS 1769 Table 5d
Page 51 and 52: UNIFIED SCREW THREADS 1771 Table 5e
Page 57 and 58: Machinery's Handbook 27th Edition M
Page 59 and 60: MINIATURE SCREW THREADS 1779 Table
Page 61 and 62: ;; ;;;; ;;;;;; ;;;;;;;; ;;;;;;;;;;
Page 67 and 68: METRIC SCREW THREADS M PROFILE 1787
Page 75 and 76: Pitch P METRIC SCREW THREADS M PROF
Page 81 and 82: Basic Thread METRIC SCREW THREADS M
Page 85 and 86: METRIC SCREW THREADS MJ PROFILE 180
Page 87 and 88: TRAPEZOIDAL METRIC THREADS 1807 Tol
Page 89 and 90: TRAPEZOIDAL METRIC THREADS 1809 Tab
Page 91 and 92: 120 140 160 180 110 130 150 170 Mac
Page 93 and 94: Machinery's Handbook 27th Edition T
Page 95 and 96: Pitch P BRITISH STANDARD ISO METRIC
Page 97: BRITISH STANDARD ISO METRIC SCREW T
Page 101 and 102: Nominal Diametera BRITISH STANDARD
Page 103 and 104: Nominal Diameter BRITISH STANDARD I
Page 105 and 106: Machinery's Handbook 27th Edition A
Page 109 and 110: Table 2b. Limiting Dimensions of AN
Page 111 and 112: Machinery's Handbook 27th Edition T
Page 113 and 114: CENTRALIZING ACME SCREW THREADS 183
Page 117 and 118: Machinery's Handbook 27th Edition C
Page 119 and 120: Table 8c. Limiting Dimensions of Am
Page 123 and 124: Machinery's Handbook 27th Edition S
Page 125 and 126: Table 14b. Limiting Dimensions for
Page 127 and 128: Nominal Sizes Table 15. Stub Acme S
Page 129 and 130: Machinery's Handbook 27th Edition B
Page 131 and 132: Thds. a per Inch ANSI BUTTRESS THRE
Page 133 and 134: ANSI BUTTRESS THREADS 1853 Table 3.
Page 135 and 136: ANSI BUTTRESS THREADS 1855 The majo
Page 137 and 138: Machinery's Handbook 27th Edition W
Page 139 and 140: WHITWORTH THREADS 1859 Table 3. Bri
Page 141 and 142: AMERICAN PIPE THREADS 1861 Table 1a
Page 143 and 144: AMERICAN PIPE THREADS 1863 guide fo
Page 147 and 148: DRYSEAL PIPE THREADS 1867 b PTF-SAE
Page 149 and 150:
Machinery's Handbook 27th Edition B
Page 151 and 152:
BRITISH PIPE THREADS 1871 British S
Page 153 and 154:
Page 155 and 156:
HOSE COUPLING SCREW THREADS 1875 Th
show all

Threads and Threading - Sportpilot.info

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?