Step Drill Bit 3-12mm 4-12mm 4-20mm 4-32mm HSS Straight Groove Titanium Coated Wood Metal Hole Cutter Drilling Power Tools Set - buy online.

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100% Brand New and High Quality

Made from high quality HSS steel

Ideal for using to cut holes in a variety of materials including brass, wood, plastic, etc.

3Pcs Hss Drill Bit Set, quality tool for jobs of all sizes

Titanium coated to reduce heat

Heat treated and highly polished. Drills perfectly round holes in steel, brass, plastic, wood etc.

6 sided shanks design in order to prevent slippage when in chuck

Two flute design drives faster, smoother and cleaner cuts each step is clearly labeled with the depth diameter in steps



Function

Deburring, Chamfering, Cutting or expanding holes

Supporting tools: Pistol drill, Hand drill, Charging drill, Bench drill.



Rotating speed

3-12 speed:260-400

4-12 speed:260-400

4-20 speed:180-240

4-32 speed:90-160



Suitable material

Workpieces with general hardness, such as wood, plastic, PVC plate, iron plate thickness within 3MM. Please note that stainless steel and spring steel are not applicable. Not for quenching.



Attention

Because of the outer diameter of each step of the step drill is gradually expanded,then the corresponding cutting resistance and linear velocity will also be gradually increased.

Owing to the step drill is completely dependent on the inclined edge that is only with 1mm length,If the feed speed is too fast when drilling,it will be easily to be annealing caused by abrasion of the oblique edge.

Please give a downward force when drilling, do not press down too hard to avoid the edge wearing.



Length

3-12mm Length: Approx. 7.9cm/ 3.11"

4-12mm Length: Approx. 6.5cm/ 2.56"

4-20mm Length: Approx. 7.7cm/ 3.0"

4-32mm Length: Approx. 10.0cm/ 3.94"

Hexagonal handle diameter: 6.35mm



Package include

1 x 3-12mm Drill Bit

1 x 4-12mm Drill Bit

1 x 4-20mm Drill Bit

1x Bag

or

Package include:

1 x 4-12mm Drill Bit

1 x 4-20mm Drill Bit

1 x 4-32mm Drill Bit

1x Bag

or

Package include:

1 x 4-32mm Drill Bit Specification View More