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Power Tools for Professionals

CO4145

12 pc. 9/32 In. x 4-1/4 In. Cobalt Drill Bit

Bosch cobalt drill bits are specially designed for drilling in hard steel. Thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance. Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating, eliminating the need for a center punch.

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Technical Data

Specification
Bulk false
Diameter 9/32"
Flute Length 2.952999
Length 4.25"
Overall Length 4.25
Quantity 6 (bulk)
Shank Diameter 0.2812

Benefits

  • Withstands high-temperature applications for extended periods of time (up to 1,100°F)
  • Rigid, thick web design adds stability to bit in tough applications
  • Surface hardened to penetrate tough abrasive materials
  • Available in jobber length, full shank
  • Best used for drilling into light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, stainless steel and titanium

Other sizes

Diameter

1/16"

Overall Length

1.875

Shank Diameter

0.0625

Quantity

1 (carded)

Diameter

5/64"

Overall Length

2

Shank Diameter

0.0781

Quantity

1 (carded)

Diameter

3/32"

Overall Length

2.25

Shank Diameter

0.0937

Quantity

1 (carded)

Diameter

7/64"

Overall Length

2.625

Shank Diameter

0.109298

Quantity

1 (carded)

Diameter

1/8"

Overall Length

2.75

Shank Diameter

0.125

Quantity

1 (carded)

Diameter

9/64"

Overall Length

2.875

Shank Diameter

0.1406

Quantity

1 (carded)

Diameter

5/32"

Overall Length

3.125

Shank Diameter

0.15625

Quantity

1 (carded)

Diameter

11/64"

Overall Length

3.25

Shank Diameter

0.1718

Quantity

1 (carded)

Diameter

13/64"

Overall Length

3.625

Shank Diameter

0.2031

Quantity

1 (carded)

Diameter

15/64"

Overall Length

3.875

Shank Diameter

0.2343

Quantity

1 (carded)

Diameter

11/32"

Overall Length

4.75

Shank Diameter

0.3437

Quantity

1 (carded)

Diameter

23/64"

Overall Length

4.875

Shank Diameter

0.3593

Quantity

1 (carded)

Diameter

3/8"

Overall Length

5

Shank Diameter

0.375

Quantity

1 (carded)

Diameter

25/64"

Overall Length

5.125

Shank Diameter

0.3906

Quantity

1 (carded)

Diameter

13/32"

Overall Length

5.25

Shank Diameter

0.4062

Quantity

1 (carded)

Diameter

27/64"

Overall Length

5.375

Shank Diameter

0.4218

Quantity

1 (carded)

Diameter

7/16"

Overall Length

5.5

Shank Diameter

0.4375

Quantity

1 (carded)

Diameter

15/32"

Overall Length

5.75

Shank Diameter

0.4687

Quantity

1 (carded)

Diameter

31/64"

Overall Length

5.875

Shank Diameter

0.4843

Quantity

1 (carded)

Diameter

1/2"

Overall Length

6

Shank Diameter

0.5

Quantity

1 (carded)

Diameter

1/64"

Overall Length

0.75

Shank Diameter

0.0156

Quantity

12 (bulk)

Diameter

3/64"

Overall Length

1.75

Shank Diameter

0.0468

Quantity

12 (bulk)

Diameter

1/16"

Overall Length

1.875

Shank Diameter

0.0625

Quantity

12 (bulk)

Diameter

5/64"

Overall Length

2

Shank Diameter

0.0781

Quantity

12 (bulk)

Diameter

3/32"

Overall Length

2.25

Shank Diameter

0.0937

Quantity

12 (bulk)

Diameter

7/64"

Overall Length

2.625

Shank Diameter

0.109298

Quantity

12 (bulk)

Diameter

1/8"

Overall Length

2.75

Shank Diameter

0.125

Quantity

12 (bulk)

Diameter

9/64"

Overall Length

2.875

Shank Diameter

0.1406

Quantity

12 (bulk)

Diameter

5/32"

Overall Length

3.125

Shank Diameter

0.15625

Quantity

12 (bulk)

Diameter

11/64"

Overall Length

3.25

Shank Diameter

0.1718

Quantity

12 (bulk)

Diameter

13/64"

Overall Length

3.365

Shank Diameter

0.2031

Quantity

12 (bulk)

Diameter

7/32"

Overall Length

3.75

Shank Diameter

0.2187

Quantity

12 (bulk)

Diameter

15/64"

Overall Length

3.875

Shank Diameter

0.2343

Quantity

12 (bulk)

Diameter

1/4"

Overall Length

4

Shank Diameter

0.25

Quantity

12 (bulk)

Diameter

17/64"

Overall Length

4.125

Shank Diameter

0.2656

Quantity

1 (carded)

Diameter

9/32"

Overall Length

4.25

Shank Diameter

0.2812

Quantity

1 (carded)

Diameter

19/64"

Overall Length

4.375

Shank Diameter

0.2968

Quantity

1 (carded)

Diameter

5/16"

Overall Length

4.5

Shank Diameter

0.3125

Quantity

1 (carded)

Diameter

21/64"

Overall Length

4.625

Shank Diameter

0.3281

Quantity

1 (carded)

Diameter

19/64"

Overall Length

4.375

Shank Diameter

0.2968

Quantity

6 (bulk)

Diameter

5/16"

Overall Length

4.5

Shank Diameter

0.3125

Quantity

6 (bulk)

Diameter

21/64"

Overall Length

4.625

Shank Diameter

0.3281

Quantity

6 (bulk)

Diameter

11/32"

Overall Length

4.75

Shank Diameter

0.3437

Quantity

6 (bulk)

Diameter

23/64"

Overall Length

4.875

Shank Diameter

0.3593

Quantity

6 (bulk)

Diameter

25/64"

Overall Length

5.125

Shank Diameter

0.3906

Quantity

6 (bulk)

Diameter

27/64"

Overall Length

5.375

Shank Diameter

0.4218

Quantity

6 (bulk)

Diameter

7/16"

Overall Length

5.5

Shank Diameter

0.4375

Quantity

6 (bulk)

Diameter

29/64"

Overall Length

5.625

Shank Diameter

0.4531

Quantity

6 (bulk)

Diameter

15/32"

Overall Length

5.75

Shank Diameter

0.4687

Quantity

6 (bulk)

Diameter

31/64"

Overall Length

5.875

Shank Diameter

0.4843

Quantity

6 (bulk)

Diameter

1/2"

Overall Length

6

Shank Diameter

0.5

Quantity

6 (bulk)

Diameter

17/64"

Overall Length

4.125

Shank Diameter

0.2656

Quantity

6 (bulk)

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