Kennametal - 1/4-28 3 Flute Modified Bottoming Spiral Flute Tap - Cobalt, Oxide Finish, 63.5mm OAL, Right Hand Flute, Right Hand Thread, H7
Item #: 37926987
Brand: Kennametal
Model #: 6140681
Exact Tooling IR#: 04
Features and Benefits
Modified bottoming chamfers are similar to bottoming chamfers, but they are longer and have more teeth. They are used for threading blind holes and have 2 to 2-1/2 threads.
Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.
Oxide, also known as black oxide or steam oxide, is a surface treatment that prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and ferrous metals.
Fast Spiral Flutes with 40-53 degree angles are suitable for ductile materials like aluminum and copper; medium to high carbon steels and free machining stainless steels.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/4-28 |
| Chamfer | Modified Bottoming |
| Thread Limit | H7 |
| Number of Flutes | 3 |
| Material | Cobalt |
| Finish/Coating | Oxide |
| Thread Direction | Right Hand |
| Flute Direction | Right Hand |
| Through Coolant | NonThrough Coolant |
| Overall Length (Decimal Inch) | 2.5000 |
| Overall Length (mm) | 63.50 |
| Helix Angle | 45 |
| Thread Length (Decimal Inch) | 0.6300 |
| Thread Length (mm) | 16.00 |
| Flute Type | Fast Spiral |
| Neck Length (Decimal Inch) | 0.3700 |
| Tapping Depth (Decimal Inch) | 1.0000 |
| Tapping Depth (mm) | 25.00 |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Shank Diameter (mm) | 6.48 |
| Shank Length (Decimal Inch) | 1.2100 |
| Shank Length (mm) | 31 |
| Square Length (Inch) | 0.3100 |