Size

Decimal Equiv. (in.)

Length Overall (in.)

Length of Flute (in.)

Morse Taper No.

1/4

.2500

5-3/16

2

1

9/32

.2812

5-5/16

2-1/8

1

5/16

.3125

5-1/2

2-1/4

1

11/32

.3438

5-5/8

2-3/8

1

3/8

.3750

5-13/16

2-1/2

1

13/32

.4062

5-15/16

2-5/8

1

7/16

.4375

6-1/8

2-3/4

1

15/32

.4688

6-1/4

2-7/8

1

1/2

.5000

6-7/16

3

1

17/32

.5312

6-9/16

3-1/8

1

9/16

.5625

6-3/4

3-1/4

1

19/32

.5938

6-7/8

3-3/8

1

5/8

.6250

7-9/16

3-1/2

2

21/32

.6562

7-3/4

3-11/16

2

11/16

.6875

8

3-7/8

2

23/32

.7188

8-3/16

4-1/16

2

3/4

.7500

8-3/8

4-3/16

2

13/16

.8125

8-13/16

4-9/16

2

7/8

.8750

9-3/16

4-7/8

2

15/16

.9375

10-3/16

5-1/8

3

1

1.0000

10-9/16

5-7/16

3

1-1/16

1.0625

10-13/16

5-5/8

3

1-1/8

1.1250

11-1/16

5-13/16

3

1-3/16

1.1875

11-5/16

6

3

1-1/4

1.2500

12-1/2

6-1/8

4

1-5/16

1.3125

12-11/16

6-1/4

4

1-3/8

1.3750

12-13/16

6-5/16

4

1-7/16

1.4375

13

6-7/16

4

1-1/2

1.5000

13-1/8

6-1/2

4