3-12mm 4-12mm 4-20mm Titanium Step Drill Bit Set Core Metal Drills Bits Stage Stepped For Wood Cone Woodworking Tools | Инструменты

3-12mm 4-12mm 4-20mm Titanium Step Drill Bit Set Core Metal Drills Bits Stage Stepped For Wood Cone Woodworking Tools | Инструменты

Note: Please be sure to check the size of the drill bit before ordering! So as not to cause unnecessary losses.

Sufficient inventory, all orders will be shipped within 24 hours.
We are always stand by online within 24 hours.Any query,pls feel free to talk with us.
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, Belgium, Portugal, United Kingdom, Germany, Italy and Netherlands: it take about 8-12 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


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
4-22 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. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)

Length:
4-12mm Length: Approx. 6.7cm/ 2.64"
4-20mm Length: Approx. 7.1cm/ 2.8"
4-22mm Length: Approx. 7.6cm/ 2.99"

The Cutters Come in the Following Sizes:
4-12mm: (4mm, 6mm, 8mm, 10mm, 12mm) 5 Steps
4-20mm:( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm）9 Steps
4-22mm:( 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm,22mm）10 Steps

Package includes:
1 x Drill Bit 4-12mm
1 x Drill Bit 4-20mm
1 x Drill Bit 4-22mm