Walter-Prototyp - 1/4-28 UNF 3 Flute 3B Bottoming Spiral Flute Tap - Cobalt, Oxide Finish, 2-1/2" OAL, Right Hand Flute, Right Hand Thread, Series A235033
Item #: 36330975
Brand: Walter-Prototyp
Model #: 5080842
Exact Tooling IR#: 04
Features and Benefits
Bottoming chamfers are used for threading blind holes. They have 1 to 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 | Bottoming |
| Class of Fit | 3B |
| 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 (Inch) | 2-1/2 |
| Overall Length (mm) | 63.50 |
| Helix Angle | 40 |
| Thread Standard | UNF |
| Material Grade | M35 |
| Oversize | No |
| Thread Length (Decimal Inch) | 0.6300 |
| Thread Length (mm) | 16.00 |
| Flute Type | Fast Spiral |
| Series/List | A235033 |
| Neck Length (Decimal Inch) | 0.4720 |
| Tapping Depth (Decimal Inch) | 1.1020 |
| Tapping Depth (mm) | 27.99 |
| Shank Diameter (Decimal Inch) | 0.2550 |
| Shank Diameter (mm) | 6.48 |
| Square Length (Inch) | 5/16 |
| Material Application | Cast Steel; Gray Cast Iron; Malleable Cast Iron; Spheroidal Cast Iron; Stainless Steel; Steel; Vermicular Cast Iron |
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