Feature(may vary by option.)

●Premium M35 5% Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
●Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.
●This Cobalt Step Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
●[4-32mm] 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)

[4-32mm(15 steps)]





Description

STROTON 4-32mm/15steps 5% Cobalt Step Drill Bit for Stainless Steel, Hard Metal.

step drill bitsstep drill bits

Why Choose STROTON Cobalt Step Drill Bit?

The research shows that HSS with cobalt has higher temperature resistance, Red hardness, greater wear resistance and higher heat treat response than HSS without cobalt .

  • The "Cobalt" from STROTON ,Add enough rare metals from STROTON to ensure the quality.
  • This step drill bit is made of Premium Cobalt (80,000 dollars per ton).
  • This step drill bit works in materials such as sheet metal, ducts, steel, copper, brass, aluminum, plastic, vinyl siding, plasterboard, PVC, stainless steel and cast iron.

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Some Important Tips about drilling stainless steel and hard metal:

  1. Running the step bit at Low Speeds and using a little appropriate cutting fluid (Drillling metal) will extend its service life.
  2. Adding cutting fluid, engine oil or water to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce if you dont have cutting fluid.
  3. Cutting Thickness:

  • Stainless Steel Sheet: Hand Drill ≤2mm , Drill Press≤5mm
  • Metal Sheet,Pvc,Woodboard and etc: Hand Drill ≤5mm , Drill Press≤5mm

STROTON Ture Cobalt Steel Products for Stainless Steel, Hard Metal, and Wood.

cobalt step bits

4mm-32mm (15 Steps)

metric drill bits set

1mm-10mm (19PCS)

cobalt drill bit set

1/16-1/4 Inch (13PCS)

cobalt drill bits

1/16-1/2 Inch (17PCS)

cobalt drill bit set

1/16-3/8 Inch (21PCS)

metric drill bits

Metric Drill Bits

cobalt drill bit set 1/4

SAE Drill Bits

Customer Reviews
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854
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3,453
4.4 out of 5 stars
348
4.5 out of 5 stars
340
4.4 out of 5 stars
117
4.3 out of 5 stars
276
4.5 out of 5 stars
340
Price
$28.49 $36.89 $16.39 $29.89 $33.89 $11.46 $12.89
Cobalt
5% Cobalt M42 8% Cobalt 5% Cobalt 5% Cobalt 5% Cobalt M42 8% Cobalt 5% Cobalt
Ideal for
Stainless Steel,Hard Metal Stainless Steel,Hard Metal Stainless Steel,Hard Metal Stainless Steel,Hard Metal Stainless Steel,Hard Metal Stainless Steel,Hard Metal Stainless Steel,Hard Metal
Brand
STROTON STROTON STROTON STROTON STROTON STROTON STROTON
Measurement System
Metric Metric SAE (inch size) SAE (inch size) SAE (inch size) Metric SAE (inch size)
Type
Right Hand Right Hand Right Hand Right Hand Right Hand Right Hand Right Hand