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Series | Master Tap | |
Thread size | 1/4-20 UNC | |
Coating | AlTiX | |
Thread type | UNC | |
Flank angle | 60 degrees | |
Tool material | HSS E PM | |
Standard | DIN 371 | |
Tolerance class | 2BX | |
Taper lead form | C | |
Helix angle | 40 degrees | |
Shank | Plain shank with h9 | |
Through-coolant | no | |
Application for type of drilling | up to 2.5×D for blind holes | |
Cutting direction | right-hand | |
Thread pitch | 1.27 mm | |
Threads per inch | 20 | |
Thread ⌀ | 6.35 mm | |
Overall length L | 80 mm | |
Shank ⌀ Ds | 7 mm | |
Shank square □ | 5.5 mm | |
Tapping hole ⌀ | 5.1 mm | |
Type of threading tool | Machine tap for dynamic machining | |
Number of clamping slots | 2 | |
Colour ring | green | |
Number of cutting edges Z | 2 | |
Thread depth | 15.9 mm | |
Type of product | Tap |
Article number | 137870 1/4-20 | |
EAN / GTIN | 4045197901569 | |
Manufacturer number | 137870 1/4-20 |
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Taper lead form | C | C | B | B | B | C |
Number of cutting edges Z | 2 | 3 | 3 | 3 | 3 | 2 |
Type of threading tool | Machine tap for dynamic machining | Machine tap for dynamic machining | Machine tap for dynamic machining | Machine tap for dynamic machining | Machine tap for dynamic machining | Machine tap for dynamic machining |
Flank angle | 60 degrees | 60 degrees | 60 degrees | 60 degrees | 60 degrees | 60 degrees |
Thread type | UNC | UNC | UNC | UNC | UNC | UNC |
Cutting direction | right-hand | right-hand | right-hand | right-hand | right-hand | right-hand |
Application for type of drilling | up to 2.5×D for blind holes | up to 2.5×D for blind holes | up to 3×D for through holes | up to 3×D for through holes | up to 3×D for through holes | up to 2.5×D for blind holes |