Point Cut of Twsit Drill Bits

Helical Point Normal Ground                                                                                                                                                                            
Applications: for all normal drilling work in steel, non-ferrous metal and plastic.
The point angles depend on the ease with which the materials can be cut.
Advantages: powerful main cut, resistant to impact and lateral forces. Simple manual grinding possible.
DIN1412 FORM C , SPLIT POINT                                                                                                                                                                      
Split point enables good centering when drilling and breaks the chips.
Suitable for drilling with high hardened tough materials like heat treated steel , titanium alloy ,
stainless steel , incoroy inconel , nimonic and deep holes drills.
DIN1412 FORM A                                                                                                                                                                                                
For all normal drilling work using drills with a strong core, for drilling into solid materials with lager drill diameters.
Advantages: goods centering when starting to drill as this type is the easiest type to grind the thinning.
In narrow web and wide fluted drills,keeping of the regidity and smooth chip removal are possible.
DIN1412 FORM B                                                                                                                                                                                                
For materials with low cutting resistance and good chip removal like cast iron,aluminium,plastic.
B type web thinning is suitable.
Advantages:this type is applied to decrease rake angle and avoid chipping of cutting lips.
DIN1412 FORM E                                                                                                                                                                                              
For drilling sheet-metal and soft materials,for blind holes.
Advantages:good centring,minimal formation of burrs when through drilling, precise drilling in thin sheets and pipes.

Share this post