INSERT DESIGNATION CHART

CLICK THE CODE LETTER OR THEIR DESCRIPTION LINKS IN THE EXAMPLE
CHARTS BELOW FOR DEFINITIONS OF VALUES:

TURNING

C N M G 4 3 2
Shape Clearance Angle Tolerance Groove / Hole Size (IC) Thickness Radius

MILLING

  S   E   K    N   4   2    A    F    T N
Shape Clearance Angle Tolerance Groove / Hole Size (IC) Thickness Radius Wiper Lead Angle Wiper Clearance Angle Cutting Edge Preparation Cutting Direction


SHAPE

Code Letter Description Diagram Nose Angle
A

85° PARALLELOGRAM

 85°
B

82° PARALLELOGRAM

 82°
C

80° DIAMOND

 80°
D

55° DIAMOND

 55°
E

75° DIAMOND

 75°
H

HEXAGON

 120°
K

55° PARALLELOGRAM

 55°
L

RECTANGLE

 90°
M

86° DIAMOND

 86°
N

55° PARALLELOGRAM

 55°
O

OCTAGON

 135°
P

PENTAGON

 108°
R

ROUND

 FULL RADIUS
S

SQUARE

 90°
T

TRIANGLE

 60°
V

35° DIAMOND

 35°
W

TRIGON

 80°
X

SP. PARALLELOGRAM

 85°


CLEARANCE OR RELIEF ANGLE

Code Letter Angle Diagram
N 0°
A 3°
B 5°
C 7°
P 11°
D 15°
E 20°
F 25°
G 30°



TOLERANCE

CODE LETTER CORNERPOINT
(inches)		 THICKNESS
(inches)		 INSCRIBED
Circle (in)		 CORNERPOINT
(mm)		 THICKNESS
(mm)		 INSCRIBED
Circle (mm)
A .0002" .001" .001" .005mm .025mm .025mm
C .0005" .001" .001" .013mm .025mm .025mm
E .001" .001" .001" .025mm .025mm .025mm
F .0002" .001" .0005" .005mm .025mm .013mm
G .001" .005" .001" .025mm .13mm .025mm
H .0005" .001" .0005" .013mm .025mm .013mm
J .002" .001" .002 -.005" .005mm .025mm .05 -.13mm
K .0005" .001" .002 -.005" .013mm .025mm .05-.13mm
L .001" .001" .002 -.005" .025mm .025mm .05 -.13mm
M .002 -.005" .005" .002 -.005" .05 -.13mm .13mm .05 -.15mm
U .005 -.012" .005" .005 -.010" .06 -.25mm .13mm .08 -.25mm

 


HOLE / CHIPBREAKER

CODE LETTER DIAGRAM HOLE HOLE SHAPE CHIPBREAKER TYPE
Null

No None
A
Yes CYLINDRICAL None
B Yes 70-90° DOUBLE COUNTERSINK None
D Yes CYLINDRICAL None
E No None
F No DOUBLE-SIDED
G Yes CYLINDRICAL DOUBLE-SIDED
H


Yes 70-90° SINGLE COUNTERSINK SINGLE-SIDED
M
Yes CYLINDRICAL, OR DBL COUNTERSINK SINGLE-SIDED
N No None
P Yes CYLINDRICAL HI-DOUBLE POSITIVE
Q Yes 40-60° DOUBLE COUNTERSINK None
R No SINGLE-SIDED
S Yes CYLINDRICAL HI-DOUBLE POSITIVE
T Yes 40-60° DOUBLE COUNTERSINK SINGLE-SIDED
U Yes 40-60° DOUBLE COUNTERSINK DOUBLE-SIDED
W


Yes 40-60° DOUBLE COUNTERSINK None
Z Yes CYLINDRICAL DOUBLE-SIDED HI-DOUBLE POSITIVE



SIZE

ANSI CODE NO. INSCRIBED CIRCLE SIZE ISO CODE NO. (METRIC CUTTING EDGE LENGTH) BY SHAPE CODE LETTER OF INSERT
DECIMAL IN. FRACTIONAL IN. C D R S T V W
0.5 .0625" 1/16"
1.2 (5) .15625" 5/32" S4 4mm 3mm 3mm  6mm
1.5 (6) .1875" 3/16" 4mm 5mm 4mm 4mm 8mm 8mm S3
1.8 (7) .21875" 7/32" 5mm 6mm 5mm 5mm 9mm 9mm 3mm
2 .25" 1/4" 6mm 7mm 6mm 6mm 11mm 11mm 4mm
2.5 .3125" 5/16" 8mm 9mm 7mm 7mm 13mm 13mm 5mm
3 .375" 3/8" 9mm 11mm 9mm 9mm 16mm 16mm 6mm
3.5 .4375" 7/16" 11mm 13mm 11mm 11mm 19mm 19mm 7mm
4 .5" 1/2" 12mm 15mm 12mm 12mm 22mm 22mm 8mm
4.5 .5625" 9/16" 14mm 17mm 14mm 14mm 24mm 24mm 9mm
5 .625" 5/8" 16mm 9mm 15mm 15mm 27mm 27mm 10mm
5.5 .6875" 11/16" 17mm 21mm 17mm 17mm 30mm 30mm 11mm
6 .75" 3/4" 19mm 23mm 19mm 19mm 33mm 33mm 13mm
6.5 .8125" 13/16"
7 .875" 7/8" 22mm 27mm 22mm 22mm 38mm 38mm 15mm
8 1" 1" 25mm 31mm 25mm 25mm 44mm 44mm 17mm
10 1.25" 1-1/4" 32mm 38mm 31mm 31mm 54mm  54mm 21mm
1.26" 32mm

THICKNESS

ANSI
CODE NO.		 ISO
CODE NO.		 DECIMAL
VALUE		 FRACTIONAL
VALUE		 MILLIMETER
VALUE
.5 (1) - 0.03125" 1/32" 0.79mm
.6 T0 0.040"  1/25" 1.00mm
1 (2) 01 0.0625" 1/16" 1.59mm
1.2 T1 0.078" 5/64" 1.98mm
1.5 (3) 02 0.094" 3/32" 2.38mm
T2 0.109" 7/64" 2.78mm
2 03 0.125" 1/8" 3.18mm
2.5 T3 0.156" 5/32" 3.97mm
3 04 0.187" 3/16" 4.76mm
05 0.219" 7/32" 5.56mm
4 06 0.25" 1/4" 6.35mm
5 07 0.313" 5/16" 7.9mm
6 09 0.375" 3/8" 9.53mm
8 0.5" 1/2" 12.7mm


RADIUS

ANSI
CODE NO.		 ISO
CODE NO.		 DECIMAL
VALUE		 FRACTIONAL
VALUE		 MILLIMETER
VALUE
Null Null WIPER FLAT WIPER FLAT WIPER FLAT
V M0 0 0 0
0.2 00 0.004" 0.1mm
X 0.004" 0.1mm
0 00 0.004" 0.2mm
0.5 0.008" 0.2mm
Y 0.008" 0.2mm
1 04 0.016" 1/64" 0.4mm
05 0.020" 0.5mm
2 08 0.031" 1/32" 0.8mm
10 0.040" 1.02mm
3 12 0.047" 3/64" 1.2mm
4 16 0.062" 1/16" 1.6mm
5 20 0.078" 5/64" 2mm
6 24 0.094" 3/32" 2.4mm
7 29 0.109" 7/64" 2.9mm
8 32 0.125" 1/8" 3.2mm


WIPER LEAD ANGLE

CODE LETTER ANGLE
A 45°
D 60°
K 60°
E 75°
L 75°
P 0°
S 75°


WIPER CLEARANCE ANGLE

CODE LETTER ANGLE
C 7°
D 15°
E 20°
F 25-26°
G 30°
N 0°
P 11°


CUTTING EDGE PREPARATION

CODE LETTER EDGE PREPARATION
F SHARP
E HONED
T T-LAND
S HONED T-LAND
X SPECIAL CHAMFER