3Pieces 3 12Mm 4 12Mm 4 20Mm Hss Straight Groove Step Drill Bit

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3Pieces 3 12mm 4-12mm 4-20mm HSS Straight Groove Step Drill Bit Titanium Coated Wood Metal Hole Cutter Core Cone Drilling Tools Set

  • length: 104mm
  • is_customized: Yes
  • Use: Metal Drilling
  • Type: Core Drill Bit
  • Material: High Speed Steel
  • Finish:: Titanium
  • DIY Supplies: Metalworking
  • Brand Name: louCnloin



  • 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:
3-12 speed:260-400
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. (Water injection cooling while working, it can effectively extend the service life of the drill bit, especially in the case of continuous drilling)

3-12mm Length: Approx. 7.9cm/ 3.11"
4-12mm Length: Approx. 6.7cm/ 2.64"
4-20mm Length: Approx. 7.4cm/ 2.91"

The Cutters Come in the Following Sizes:
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 included:
1 x Drill Bit 3-12mm
1 x Drill Bit 4-12mm
1 x Drill Bit 4-20mm
1x Bag(Option Option and Blue or Black Random Delivery)

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  • Processing Time: Your order will be packaged and shipped within 2-4 days of ordering
  • Shipping Time: Shipments within the United Kingdom take 7 - 15 days. Typically it takes up to 10 - 20 business days to arrive at an international address. This time is from the date that it is shipped out, not the day the order is placed. However, the delivery may take a little longer than usual due to holidays.
  • Return & Exchange: If for some reasons you are not happy with your purchase, we will happily work with you to correct the problems.
  • Tracking Number: When available, we will send you the tracking number with the confirmation email so that you can track the package online.
  • If you have any other queries, please feel free to email us: support@thegiftofsunshine.org
3Pieces 3 12Mm 4 12Mm 4 20Mm Hss Straight Groove Step Drill Bit
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