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Number Sizes Series J100
General purpose drills for steels, cast steel, grey cast iron, malleable cast iron, nickel brass, aluminium alloy and graphite. Point angle: 118°, helix angle: normal, web thickness: standard, relief angle: 8° - 20°, tolerance of diameter: h8, tolerance of shank: f11. Manufactured to ANSI B328, BS 328 and DIN 338.
Number & Letter Gauge Drills:
Gauge drills are still in common use in the U.S. In the past, they were popular elsewhere, but now have been largely discarded in favour of metric sizes. When using a gauge rather than a standard measurement of size the user has to refer to a table of gauge sizes. For example, to drill a hole which is 10 thou (thousandth of an inch .0010) bigger than a 1/8 inch bolt, the user must first work out that 1/8 inch is 125 thou, so the hole size needed is 135 thou, and then must look up in a reference book which gauge drill bit is closest to this diameter - a number 29. Number gauge sizes are similar or equivalent in some respects to, but different from, American wire gauge. Number gauge is usually used from size 80 (the smallest) to size 1 (the largest) followed by letter gauge size A (the smallest) to size Z (the largest). Number gauge is actually defined down to size 97, but these smaller sizes are rarely encountered. It happens that as the technology for making small drill bits and drilling small holes has become more available, metric drills have become the norm.
Atrybut | Wartość |
---|---|
Brand | Sherwood |
Całkowita długość | 57mm |
Długość fletu | 30mm |
Dostawa chłodziwa | Zewnętrzne |
EAN | 5036140387003 |
ECLASS Code | 21010101 |
Grubość web | Standardowy |
Indywidualne lub zestawowe | Individual |
Kąt wierzchołkowy | 118° |
Kierunek cięcia | Prawa ręka |
Konstrukcja fletu | Wiertło cylindryczne |
Liczba fletów | 2 |
Materiał | Stal szybkobieżna |
Średnica wiertła metryczna | 0.101mm |
Średnica wiertła w calach | 2.578in. |
Standardy spełnione | DIN 338 |
Tolerancja średnicy trzonu | f11 |
Tolerancja średnicy wiertła | h8 |
Typ fletu | Spirală |
Typ helisa | Normalna helisa |
Typ punktu | Punct de scindare |
UNSPSC Code | 23241634 |
Wskaźnik średnicy wiertła | No.38 |
Wykończenie/Powłoka | Czarna oksydowana |