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  • VIDEO
Premium Cobalt Drill Bits for Stainless Steel and Hard MetalSTROTON
  • STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
  • To view this video, download

Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

4.4 out of 5 stars 747 ratings
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About this item

  • 【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 3X Heat,Wear and Chip Resistance and 3X Tool Life.
  • 【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws.
  • 【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 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.
  • 【Sharp Drill Bit Edge】- This Kind of Drill Bits Beast Can Even Cut Hardened Metal into Long Iron Bars, While a Dull Drill Bit Can Just Slowly Wear Through Metal.
  • 【13 Pieces Jobber Length Industrial Drill Bits Includes】:1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 [DIA 1/64 Inch Increments]
› See more product details

Product details

  • Product Dimensions ‏ : ‎ 17.78 x 7.62 x 1.75 cm; 130 g
  • Date First Available ‏ : ‎ Dec 3 2022
  • Manufacturer ‏ : ‎ STROTON Ltd
  • ASIN ‏ : ‎ B0BNCKB8DR
  • Item model number ‏ : ‎ M35-Co5-inch-S
  • 鶹 Rank: #5,330 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)
  • Customer Reviews:
    4.4 out of 5 stars 747 ratings

Frequently bought together

This item: STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
$20.89
Get it by Saturday, Nov 22
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Sold by STROTON and ships from 鶹 Fulfillment.
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ZELCAN Step Drill Bits, HSS 5PCS Titanium Step Drill Bit Set, 50 Sizes in 5 High Speed Steel Unibit Drill Bits Set for Sheet
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JEFE HEX 13-Piece Drill Bits Set-1/16" 5/64" 3/32" 7/64" 1/8" 9/64" 5/32" 11/64" 3/16" 13/64" 7/32" 15/64" 1/4", Hex Shank Dr
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Product Description

Why Choose Premium STROTON Cobalt Drill Bits?

Researches have shown that compared with HSS without cobalt, HSS with cobalt has higher temperature resistance, red hardness, wear resistance and heat treatment response.

  • Red hardness, which means that the drill bits hardened steel can maintain hard at 860-880℃.
  • 68 HRC,it means that the drill bits has 3X cutting ability and 3X durability.
  • This drill bits set is made of True Premium Cobalt (80,000 dollars per ton).

bits
cobalt

Truly Made of 5% Cobalt Alloy Steel

  • This drill bits set definitely have more cobalt in them than the "Cobalt" bits that HF sells--which are just Cobalt coated or only a tiny amount of cobalt tipped.
  • Compared with ordinary high speed steel, 5% cobalt provides better heat and wear resistance,and Hold up Better.

drill holes

3X Drilling Efficiency + 3X Tool Life

  • Split Point design tip starts drilling immediately with less force and eliminates "walking" across the work surface.
  • Ideal for Stainless steel,Mild Steel,Iron,Hardmetal,Aluminum,Copper,Plastic and Hardwood.
  • The drill bit can be used for mechanical maintenance, such as drilling out bolts and screws.

cobalt drill bits set for stainless steel and metal

Be vertical to the workpiece

  • Non-vertical use may cause the drill bit to break.
  • Using a drill press with sufficient power will make drilling easier.

low speed

Low speed: 200 to 1000 RPM

  • Too high speed may burn the bit tip.
  • Drill diameter≤3/16，RPM（1000~700）
  • 3/16-3/8，Rʲ（700350）
  • 3/8-1/2，Rʲ（350200）

cool down

Use cutting fluid

  • Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating.
  • It also works adding some vinegar,soy sauce or water.

bits

Remain steady and patient

  • The drilling shall be started slowly by applying force slowly and gently until the drill bit starts chipping.

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

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

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

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

1mm-10mm (19PCS)

4mm-32mm (15 Steps)

Metric Drill Bits

Buying Options
Customer Reviews
4.4 out of 5 stars 747
4.5 out of 5 stars 219
4.5 out of 5 stars 469
4.3 out of 5 stars 4,219
4.5 out of 5 stars 1,075
4.4 out of 5 stars 469
Cobalt
5% Cobalt 5% Cobalt 5% Cobalt M42 8% Cobalt 5% Cobalt M42 8% Cobalt
Measurement System
SAE (inch size) SAE (inch size) SAE (inch size) Metric Metric Metric
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
Brand
STROTON STROTON STROTON STROTON STROTON STROTON
Type
Right Hand Right Hand Right Hand Right Hand Right Hand Right Hand

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Product Summary: STROTON Cobalt Drill Bit Set (1/16-1/4 Inch, 13PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

From STROTON

4.4 out of 5 stars, 747 ratings

Customer reviews

100+ bought in past month

Price

No featured offers available

Other sellers

Other sellers

About this Item

  • 【Premium True 5% Cobalt Steel with 68 HRC】- The Marked Cobalt Content of Ordinary Drill Bits May be False, but This Drill Bits Set is Made of Cobalt Ore from Our Own Mine, Which Indeed Contains 5% Cobalt. Although the Cost and Price are Slightly Higher, It Usually is able to Provide 3X Heat,Wear and Chip Resistance and 3X Tool Life.
  • 【Split Point Design and Fully Ground Process】- Compared with Other Ordinary Drill Bits, This Drill Bits Set is Particularly Suitable for Heavy Duty Work, Such as Cutting through Stainless Steel,Steel Plate,Iron Sheet, Cast Iron and Hardwood, and Drilling Out Bolts Studs and Screws.
  • 【3X Efficiency + 3X Tool Life】- This Cobalt High Speed Steel Drill Bits Set is Typically Capable of Running 3 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.
  • 【Sharp Drill Bit Edge】- This Kind of Drill Bits Beast Can Even Cut Hardened Metal into Long Iron Bars, While a Dull Drill Bit Can Just Slowly Wear Through Metal.
  • 【13 Pieces Jobber Length Industrial Drill Bits Includes】:1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 [DIA 1/64 Inch Increments]

Product description

Product Advantages : (1) Split Point Design Tip starts drilling immediately with less force and eliminates "walking" across the work surface. (2) Holds up better than generic high-speed steel, Cobalt gives high-speed steel more heat and wear resistance. (3) This drill bits set is made of Premium Cobalt (80,000 dollars per ton). (4) The M35 5% cobalt drill bits can cut through Stainless steel and Hard metal,Hard wood, although they can be used for softer materials such as Aluminum,Plastic. Some Important Tips about drilling stainless steel and hard metal : &nbsp &nbsp (1)Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel. ________________________________ &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp Stainless Steel &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp ____________________________ &nbsp &nbsp &nbsp Drill diameter &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp RPM &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp ____________________________ &nbsp &nbsp &nbsp ≤3/16 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 1000~700 &nbsp &nbsp ____________________________ &nbsp &nbsp &nbsp 3/16-3/8 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 700~350 &nbsp &nbsp ____________________________ &nbsp &nbsp &nbsp 3/8-1/2 &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp &nbsp 350~200 ________________________________ &nbsp &nbsp (2)Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce or water if you don't have engine oil.
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