ANSI B212.18-2002 Designation

Boring Bars

The above code example describes a right-hand side, internally cooled carbide boring bar with a shank diameter of 3/4", a functional length of ~10" (250mm, long version), and a tool angle of 95°. The insert is held with a screw. It has an indexable insert with 35° corner angles, 7° clearance angle and ~13mm (0.5") cutting edge length.

This boring bar is part of our Copy 35 ° turning program.

Designation symbols

1. | Type of bar

Key Material coolant hole
E Carbide w/
C Carbide w/o
A Steel w/
S Steel w/o

2. | Bar diameter

Key Shank diameter Neck diameter
0605 5/16" 6 mm
0806 6/16" 8 mm
1008 8/16" 10 mm
1210 10/16" 12 mm
05 5/16" -
06 6/16" -
08 8/16" -
10 10/16" -
12 12/16" -
16 16/16" -
20 20/16" -

3. | Bar length

Key Length
F 80
H 100
K 125
M 150
Q 180
R 200
S 250
T 300

4. | Method of holding

Key Method
S With screw through hole

5. | Insert Shape

Key Included Angle Shape
C 80° Diamond
D 55° Diamond
E 75° Diamond
G 45° Diamond
S 90° Square
T 60° Triangle
V 35° Diamond
W 80° Trigon

6. | Bar geometry (lead angle)

Key Tool cutting edge angle Insert shape
L 95° All
M 40° All
O All
U 93° All
V 15° All
Q 107.5° D
Q 95°, backwards V
X 50°, backwards C
X 93°, backwards D
X 113° V

7. | Insert clearance angle

Key Clearance angle
C
P 11°
D 15°

8. | Hand of boring bar

Key Hand of boring bar
R Right
N Neutral
L Left

9. | Insert size

Key Insert size (mm) Inscribed circle
04 04 5/32"
05 05 7/32"
06 06 1/4"
07 07 1/4"
09 09 3/8"
11 11 3/8"
13 13 5/16"
16 16 1/2"