Guhring - #12-28 UNF 3 Flute 3B Modified Bottoming Spiral Flute Tap - Powdered Metal, TiN Finish, 2-3/8" OAL, Right Hand Flute, Right Hand Thread, Series 3999
Item #: 83921742
Brand: Guhring
Model #: 9039990054860
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.
Powdered Metal (PM) is tougher and more cost effective than solid carbide. It is commonly used on highly abrasive materials including high silicon aluminums.
Titanium Nitride (TiN) is a multi-purpose coating which increases chip flow in softer materials. The heat and hardness resistance allows the tool to run at higher speeds than uncoated tools.
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) | #12-28 |
| Chamfer | Modified Bottoming |
| Class of Fit | 3B |
| Number of Flutes | 3 |
| Material | Powdered Metal |
| Finish/Coating | TiN |
| Thread Direction | Right Hand |
| Flute Direction | Right Hand |
| Through Coolant | NonThrough Coolant |
| Overall Length (Decimal Inch) | 2.3820 |
| Overall Length (Inch) | 2-3/8 |
| Overall Length (mm) | 61.00 |
| Helix Angle | 40 |
| Thread Standard | UNF |
| Flute Type | Fast Spiral |
| Series/List | 3999 |
| Shank Diameter (Decimal Inch) | 0.2200 |
| Square Length (Inch) | 0.1650 |
| Material Application | Stainless Steel |
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