Addison Parallel Shank Twist Drills.            

High Speed Steel

Parallel Shank Twist Drills

Jobber Series

 Specification Conform

to BS : 328 - 1959

Dimensions in Inches

parallelshankjobberseriesdrills

Wire gauge - Number series drills and Letter series drills are used in metal, plastic and wood working. They have 118º as a standard point for general purpose application. Tapping is easy as the bits drills near to exact size holes. Generally available in fractional sizes.

 
Wire Gauge h 8 (Number Series) Flute Length Overall Length
53, 52 25/32 1.11/16
51, 50, 49 7/8 1.13/16
48, 47, 46, 45 15/16 1.15/16
44, 43 1.1/16 2.3/32
42, 41, 40,
39, 38, 37		 1.3/16 2.1/4
36, 35, 34,
33, 32  		1.5/16 2.13/32
31, 30 1.7/16 2.9/16
29, 28, 27, 26 2.3/4
25, 24, 23,
22,21, 20, 19		 1.11/16 2.15/16
18, 17, 16,
15, 14, 13		 1.27/32 3.5/32
12, 11, 10,
9,8, 7, 6, 5		 2.1/16 3.3/8
4, 3, 2, 1 2.1/4 3.21/32
 
Wire Gauge h 8 (Letter  Series) Flute Length Overall Length
A 2.1/4 3.21/32
B
C
D
E
F
G		 2.1/2 3.31/32
H
I
J
K
L
M 		2.23/32 4.9/32
N
O
P
Q		 2.15/16 4.19/32
R
S
T
U		 3.3/16 4.29/32
V
W
X
Y
Z		 3.7/16 5.1/4

Drills

 Addison