DIN333 HSS Drill Bits Titanium Coated Straight Flute / Spiral Flute Centre drill bits

DIN333 HSS Drill Bits Titanium Coated Straight Flute / Spiral Flute Centre drill bits

• Flute type :N

• Material: high speed steel or high speed steel with cobalt

• Surface treatment: bright finished or titanium coating

• Size: 1mm~12.5mm

Feture of the center drill bits

• Center drill bits are used with the lathe to drill a hole in the end of the work-piecefor mounting .

• The drill bits are designed to drill a small diameter pilot hole with a 60 degree countersink .

• Center drill bits are also used extensively with the milling machine to accurately start holes.

• The hole locations can be dialed in using the milling machine's calibrated hand wheels, then the hole is started using the center drill.

• The large diameter shank on the center drill holds the drill point right on center, Once the hole is started, the center drill is replaced with a drill of the desired diameter and the hole is finished.

• It is imperative hat a cutting lubricant is used, and the center drill is backed off several times to prevent the tip from twisting off.