Addison Parallel Shank Twist Drills.

High Speed Steel

Parallel Shank Twist Drills

Long Series

 Specification Conform

to BS : 328/Part 1- 1959

Dimensions in Inches

parallelshanktwistdrillslongseries

Parallel shank twist drills have two helical flutes, generally right hand cutting and are available in bright finish. A long series twist drill has longer or increased flute length for deep reach. General purpose engineering drills for applications in metal and plastic.

Diameter h 8 Flute Length Overall Length
1/8 2.23/32 4.3/16
9/64 2.7/8 4.13/32
5/32 3.1/16 4.11/16
11/64 3.7/32 4.31/32
3/16
13/64		 3.7/16 5.3/16
7/32
15/64		 3.19/32 5.13/32
1/4 3.13/16 5.13/16
17/64
9/32		 4 6.1/8
19/64
5/16
21/64		 4.9/32 6.1/2
11/32
23/64		 4.17/32 6.7/8
3/8
25/64
13/32		 4.3/4 7.1/4
27/64
7/16
29/64		 5.1/32 7.11/16
15/32
31/64
1/2
33/64		 5.9/32 8.1/16
17/32
35/64		 5.1/2 8.7/16
Diameter h 8 Flute Length Overall Length
9/16
37/64		 5.11/16 8.21/32
19/32
39/64
5/8		 5.7/8 8.15/16
41/64
21/32		 6.1/16 9.1/4
43/64
11/16
45/64		 6.7/32 9.1/2
23/32
47/64		 6.3/8 9.23/32
3/4
49/64
25/32		 6.17/32 10
51/64
13/16
53/64		 6.23/32 10.9/32
27/32
55/64
7/8		 6.15/16 10.9/16
57/64
29/32
59/64		 7.3/32 10.13/16
15/16
61/64
31/32		 7.9/32 11.3/32
63/64
1		 7.15/32 11.13/32

Drills

 Addison