When Should I Use Flat Drills (Flat Bottom Tools) ?

Flat Drill (or Flat Bottom Tool) is applicable for a multitude of drilling applications such as angled surface, curved surface, flat bottom hole, eccentric hole, and more.
The following graphic expression will help you understand at a glance.

1. Inclined Surface
2. Curved Surface
3. Cross-Hole
4. Counter boring
5. Guide Hole
6. Inclined Exit Surface
7. Thin Plate
8. Correction of Eccentric Hole
9. Half Hole
10. Chained Hole
11. Thin Plate
12. Blind Hole for Threading 

 
Tips: When using long flute drill bits, it’s better to use a positioning hole or a guide hole in advance.



● Position Hole: 1xD to 3xD deep drilled to assure consistent and precise holes with a long drill, and the guide hole should be bigger around 0.1mm than the diameter of the drill.
● Guide Holes: In order to assure precise hole position, and the guide hole should be bigger around 0.1mm than the diameter of the drill.

In order to meet manufacturers’ various processing needs, Speed Tiger Flat Bottom Drills Series provides with the 2D and 4D, a general-purpose type that can be used for a wide range of machining; the 3D and 5D with coolant holes that can be effectively used in stainless steel application too.

The features of Speed Tiger Flat Drills (Flat Bottom Tools) :

1) Special geometry design:

• Provides superior chip evacuation.
• Allows break-chips effectively.
• Enhance the cutting edge.
• 

2) Special flute design:

• A. Tip protection for Stronger Corner - Protect the edge and with excellent chipping resistance.
• B. The smooth surface of the helix cutting edge.
• C. Double margin for 4FD /3FDC / 5FDC - Allows high precision straight cutting.

Related Products Info:

• 2xD & 4xD Carbide Flat Drill - Without Coolant Hole 
• 3xD & 5xD Carbide Flat Drill - With Coolant Hole 

 If you have any questions or needs, please feel free to contact us!

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About Speed Tiger

Speed Tiger is a professional manufacturer of Carbide Cutting Tools and offers OEM Services, having rich experience in producing carbide cutting tools and processing consultants for more than 24 years.


Established in 1998, Speed Tiger specialized in the production of precision carbide end mills, drills, turning tools, thread mills, and other tungsten carbide steel customized cutting tools. Speed Tiger crafts cutting tools at extreme nanometer precision +-2㎛ to the exact, enabling to achieve professional cutting quality.

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