Guhring - Spiral Flute STI Taps Thread Size (Inch): 1/2-20 Class of Fit: 3B
Item #: 30098875
Brand: Guhring
Model #: 9039890127000
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.
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.
Product Specifications
Spiral Flute STI Taps; Thread Size (Inch): 1/2-20 ; Class of Fit: 3B ; Thread Limit: H5/H6 ; Number of Flutes: 4 ; Chamfer: Modified Bottoming ; Finish/Coating: TiN
| Thread Size (Inch) | 1/2-20 |
| Class of Fit | 3B |
| Thread Limit | H5/H6 |
| Number of Flutes | 4 |
| Chamfer | Modified Bottoming |
| Finish/Coating | TiN |
| Overall Length (Decimal Inch) | 3.5900 |
| Overall Length (mm) | 91.30 |
| Helix Angle | 40 |
| Thread Standard | UNF |
| Material | High Speed Steel |
| Flute Direction | Right Hand |
| Series/List | 3989 |
| Shank Diameter (Decimal Inch) | 0.4290 |
| Shank Diameter (mm) | 10.89 |
| Material Application | Alloyed Steel; Cast Iron; Cutting Steel; Hardened Steel; Tool Steel |
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