Общий каталог Yamawa 2021 - страница 721
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Каталоги Yamawa твердосплавные метчики для закаленной стали
American Taper Pipe Threads (NPT) (Refer to ANSI/ASME B1.20.1-1983) Unit: mm
SP
| Si | L1 | L3 | L1L3 | Minor D | iameter | Bored Hole Size (reference) | reference Tap | |||||
| ze | + | Pipe End( | Basic Diamete | r Position) | Position awa | yfrom Pipe En | d by (L1+L3) | Maximum Size | Basic Diameter | |||
| Maximum Value | Minimum Value | Tolerance | Maximum Value | Minimum Value | Tolerance | of Straight Bored Hole | Position ℓg | |||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 0 | ! | " | |
| NPT | 1/16 - 27 | 4.064 | 2.822 | 6.886 | 6.510 | 6.388 | 0.122 | 6.080 | 5.958 | 0.122 | 6.05 | 12.00 |
| NPT | 1/8 - 27 | 4.102 | 2.822 | 6.924 | 8.857 | 8.736 | 0.121 | 8.425 | 8.303 | 0.122 | 8.39 | 12.05 |
| NPT | 1/4 - 18 | 5.786 | 4.234 | 10.020 | 11.514 | 11.357 | 0.157 | 10.888 | 10.730 | 0.158 | 10.85 | 17.45 |
| NPT | 3/8 - 18 | 6.096 | 4.234 | 10.330 | 14.953 | 14.796 | 0.157 | 14.308 | 14.150 | 0.158 | 14.27 | 17.65 |
| NPT | 1/2 - 14 | 8.128 | 5.443 | 13.571 | 18.485 | 18.323 | 0.162 | 17.637 | 17.475 | 0.162 | 17.60 | 22.85 |
| NPT | 3/4 - 14 | 8.611 | 5.443 | 14.054 | 23.831 | 23.668 | 0.163 | 22.952 | 22.790 | 0.162 | 22.91 | 22.95 |
| NPT | 1 - 11.5 | 10.160 | 6.627 | 16.787 | 29.868 | 29.696 | 0.172 | 28.819 | 28.647 | 0.172 | 28.78 | 27.40 |
| NPT | 1 1/4 - 11.5 | 10.668 | 6.627 | 17.295 | 38.625 | 38.452 | 0.173 | 37.544 | 37.372 | 0.172 | 37.50 | 28.10 |
| NPT | 1 1/2 - 11.5 | 10.668 | 6.627 | 17.295 | 44.695 | 44.522 | 0.173 | 43.614 | 43.441 | 0.173 | 43.57 | 28.40 |
| NPT | 2 - 11.5 | 11.074 | 6.627 | 17.701 | 56.732 | 56.560 | 0.172 | 55.626 | 55.454 | 0.172 | 55.58 | 28.00 |
| NPT | 2 1/2 - 8 | 17.323 | 6.350 | 23.673 | 67.806 | 67.618 | 0.188 | 66.326 | 66.138 | 0.188 | 66.28 | 40.80 |
| NPT | 3 - 8 | 19.456 | 6.350 | 25.806 | 83.715 | 83.527 | 0.188 | 82.102 | 81.914 | 0.188 | 82.05 | 42.95 |
ST
ROLL
CARBIDE
LONG
| Remarks 1. | Pipe End is Basic Diameter Position (E1). |
| Remarks 2. | Effective Thread Length is the length away from Pipe End by (L1+L3). |
| Remarks 3. | Concerning bored hole shape, considering load on taps, taper bored hole is recommended. |
| Remarks 4. | When applying taper bored hole. by referring to values in shown columns5,6and8,9, prepare the taper hole by using pipe reamer (1/16 taper). By referring to values shown in column!, select the drill diameter before reaming by taking reamer's margin into account. |
| Remarks 5. | When preparing straight bored hole, by referring to values shown in column!, select drill diameter. |
L 3 L 1
NPT EXTERNAL THREAD
SPECIAL diameter. THREADS,