Note:

Sufficient inventory, all orders will be shipped within 24 hours.

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If you want to receive the order more quickly, please choose shipping method: Aliexpress Standard Shipping which has a successful delivery rate of 99.99%

To Korea : it take about 7-10 days

To Spain, France, Poland and Netherlands: it take about 10-15 days

To other European countries and Ukraine,Belarus,Russian Federation: it take about 15-20 days

To other countries: it take about 20-35 days.

3Pcs 3-12/4-12/4-20mm HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Cone Drill Drilling Power Tools

Note:High-Speed Steel 4241 Suitable Material: suitable for work pieces with a hardness of less than 25, thin iron plates, aluminum, insulating plates, and PVC plates. The thickness of the wood is within 5mm. A drill can be used to punch holes of various specifications.

Features:

100% Brand New and High Quality

Made from high quality HSS steel

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

Titanium coated to reduce mit and heat

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

3 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. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)

Rotating speed:

4-12 speed:260-400

4-20 Speed:180-240

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.

Suitable material:

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

Length:

3-12mm Length: Approx. 7.9cm/ 3.11″

4-12mm Length: Approx. 6.7cm/ 2.60″

4-20mm Length: Approx. 7.2cm/ 2.84″

The Cutters Come in the Following Sizes:

3-12mm(3mm,4mm,5mm,6mm,7mm,8mm,9mm,10mm,11mm,12mm) 10 Steps

4-12mm: (4mm, 6mm, 8mm, 10mm, 12mm) 5 Steps

4-20mm:( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm）9 Steps

Package includes:

1 x Drill Bit 3-12mm

1 x Drill Bit 4-12mm

1 x Drill Bit 4-20mm