Reference Guide

ManualsBrandsIRWIN ManualsPower Tools15

www.irwin.com

Metal Drilling

METAL DRILLING

148

Mechanics Length / Screw Machine Length Drill Bits

HSS Fractional

Screw Machine Length Drill Bits

(Series 301)

Size

Decimal

Equiv.

Flute

Length

Overall

Length

Carded

Item #

Bulk

Item #

1/16"

.0625

5/8"

1-5/8"

—

30104

5/64"

.0781

11/16"

1-11/16"

—

30105

3/32"

.0938

3/4"

1-3/4"

—

30106

7/64"

.1094

13/16"

1-13/16"

—

30107

1/8"

.1250

7/8"

1-7/8"

—

30108

9/64"

.1406

15/16"

1-15/16"

—

30109

5/32"

.1562

2-1/16"

—

30110

11/64"

.1719

1-1/16"

2-1/8"

—

30111

3/16"

.1875

1-1/8"

2-3/16"

—

30112ZR

13/64"

.2031

1-3/16"

2-1/4"

—

30113

7/32"

.2188

1-1/4"

2-3/8"

—

30114

15/64"

.2344

1-5/16"

2-7/16"

—

30115

1/4"

.2500

1-3/8"

2-1/2"

—

30116

17/64"

.2656

1-7/16"

2-5/8"

—

30117

9/32"

.2813

1-1/2"

2-11/16"

—

30118

19/64"

.2969

1-9/16"

2-3/4"

—

30119

5/16"

.3125

1-5/8"

2-13/16"

—

30120

21/64"

.3281

1-11/16"

2-15/16"

—

30121

11/32"

.3438

1-11/16"

—

30122ZR

23/64"

.3594

1-3/4"

3-1/16"

—

30123

3/8"

.3750

1-13/16"

3-1/8"

—

30124

25/64"

.3906

1-7/8"

3-1/4"

—

30125

13/32"

.4063

1-15/16"

3-5/16"

—

30126

27/64"

.4219

3-3/8"

—

30127ZR

7/16"

.4375

2-1/16"

3-7/16"

—

30128ZR

29/64"

.4531

2-1/8"

3-9/16"

—

30129ZR

15/32"

.4689

2-1/8"

3-5/8"

—

30130

31/64"

.4844

2-3/16"

3-11/16"

—

30131

1/2"

.5000

2-1/4"

3-3/4"

—

30132ZR

• 135° split-point tip starts drilling immediately and

eliminates “walking.”

• Engineered with premium high speed steel with black

oxide coating for corrosion resistance.

• Shorter length for increased strength and rigidity

(commonly known as “stubbies”).

• Straight shank

Applications:

Industrial applications, maintenance and repair,

automotive, machine shop

30132

Left-Hand Cobalt HSS Fractional

Mechanics Length Drill Bits with

135˚ Split Point (Series 305)

Size

Decimal

Equiv.

Flute

Length

Overall

Length

Carded

Item #

Bulk

Item #

5/64"

.0781

—

30505ZR

7/64"

.1094

2-3/16"

—

30507

1/8"

.1250

1-1/16"

2-1/4"

—

30508

5/32"

.1563

1-1/4"

2-9/16"

—

30510

3/16"

.1875

1-1/2"

2-7/8"

—

30512ZR

7/32"

.2188

1-5/8"

3-1/8"

—

30514

1/4"

.2500

1-3/4"

3-5/16"

—

30516

9/32"

.2812

3-9/16"

—

30518ZR

19/64"

.2969

2-1/16"

3-5/8"

—

30519

5/16"

.3125

2-1/8"

3-3/4"

—

31520

11/32"

.3438

2-1/4"

3-15/16"

—

30522

3/8"

.3750

2-3/8"

4-1/8"

—

30524

13/32"

.4062

2-1/2"

4-3/8"

—

30526ZR

7/16"

.4375

2-5/8"

4-9/16"

—

30528

15/32"

.4688

2-3/4"

4-3/4"

—

30530

1/2"

.5000

2-7/8"

—

30532

• 8% Cobalt alloyed for higher heat and abrasion resistance.

• Shorter drill for additional strength.

• Drill into fasteners without tightening them.

• Can often remove broken fasteners without an extractor.

Sets:

5-piece Set: 30520

30524