Диаметры сверл для отверстий под трубную цилиндрическую резьбу
| Обозначение резьбы |
Шаг резьбы, мм |
Число ниток на 1 дюйм |
Диаметр сверла под резьбу, мм |
Диаметр отверстия под резьбу, мм |
| Номинальный |
Предельные отклонения для классов точности |
| A |
B |
| G1/8 | 0.907 | 28 | 8.7 | 8.62 | +0.1 | +0.2 |
|---|
| G1/4 | 1.337 | 19 | 11.5 | 11.5 | +0.12 | +0.25 |
|---|
| G3/8 | 1.337 | 19 | 15 | 15 | +0.12 | +0.25 |
|---|
| G1/2 | 1.814 | 14 | 18.75 | 18.68 | +0.14 | +0.28 |
|---|
| G5/8 | 1.814 | 14 | 20.75 | 20.64 | +0.14 | +0.28 |
|---|
| G3/4 | 1.814 | 14 | 24.25 | 24.17 | +0.14 | +0.28 |
|---|
| G7/8 | 1.814 | 14 | 28 | 27.93 | +0.14 | +0.28 |
|---|
| G1 | 2.309 | 11 | 30.5 | 30.34 | +0.18 | +0.36 |
|---|
| G1 1/8 | 2.309 | 11 | 35 | 35 | +0.18 | +0.36 |
|---|
| G1 1/4 | 2.309 | 11 | 39 | 39 | +0.18 | +0.36 |
|---|
| G1 3/8 | 2.309 | 11 | 41.5 | 41.41 | +0.18 | +0.36 |
|---|
| G1 1/2 | 2.309 | 11 | 45 | 44.9 | +0.18 | +0.36 |
|---|
| G1 3/4 | 2.309 | 11 | 51 | 50.84 | +0.18 | +0.36 |
|---|
| G2 | 2.309 | 11 | - | 56.7 | +0.18 | +0.36 |
|---|
| G2 1/4 | 2.309 | 11 | - | 62.8 | +0.22 | +0.43 |
|---|
| G2 1/2 | 2.309 | 11 | - | 72.27 | +0.22 | +0.43 |
|---|
| G2 3/4 | 2.309 | 11 | - | 78.62 | +0.22 | +0.43 |
|---|
| G3 | 2.309 | 11 | - | 84.97 | +0.22 | +0.43 |
|---|
| G3 1/4 | 2.309 | 11 | - | 91.07 | +0.22 | +0.43 |
|---|
| G3 1/2 | 2.309 | 11 | - | 97.42 | +0.22 | +0.43 |
|---|
| G3 3/4 | 2.309 | 11 | - | 103.77 | +0.22 | +0.43 |
|---|
| G4 | 2.309 | 11 | - | 110.12 | +0.22 | +0.43 |
|---|
| G4 1/2 | 2.309 | 11 | - | 122.82 | +0.22 | +0.43 |
|---|
| G5 | 2.309 | 11 | - | 135.52 | +0.22 | +0.43 |
|---|
| G5 1/2 | 2.309 | 11 | - | 148.22 | +0.22 | +0.43 |
|---|
| G6 | 2.309 | 11 | - | 160.92 | +0.22 | +0.43 |
|---|