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Usinage - Tournage/Alésage - 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     (e.g. "CNMG432" / "CCMT32.51")            
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/td

35
W

trigon

80
X

sp. parallelogram

> 85
Clearance or Relief Angle    (e.g. "CNMG432" / "CCMT32.51")   HAUT
 
Code Letter Angle Diagram
N 0
A 3
B 5
C 7
P 11
D 15
E 20
F 25
G 30
Tolerance      (e.g. "CNMG432" / "CCMT32.51")    
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 (e.g. "CNMG432" / "CCMT32.51")  HAUT
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     (e.g. "CNMG432" / "CCMT32.51")    HAUT
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 .15625" 5/32              
1.5 .1875" 3/16 04 (4mm) 5mm 04 (4mm) 04 (4mm) 8mm 8mm S3
1.8 .21875" 7/32              
2 .25" 1/4 06 (6mm) 07 (7mm) 06 (6mm) 06 (6mm) 11 (11mm) 11 (11mm) 04 (4mm)
2.5 .3125" 5/16 08 (8mm) 9mm 07 (7mm) 07 (7mm) 13 (13mm) 13 (13mm) 05 (5mm)
3 .375" 3/8 09 (9mm) 11 (11mm) 09 (9mm) 09 (9mm) 16 (16mm) 16 (16mm) 06 (6mm)
3.5 .4375" 7/16 11mm 13mm 11 (11mm) 11 (11mm) 19 (19mm) 19mm 7mm
4 .5" 1/2 12 (12mm) 15 (15mm) 12 (12mm) 12 (12mm) 22 (22mm) 22 (22mm) 08 (8mm)
4.5 .5625" 9/16 14mm 17mm 14 (14mm) 14 (14mm) 24mm 24mm 9mm
5 .625" 5/8 16 (16mm) 19 (9mm) 15 (15mm) 15 (15mm) 27 (27mm) 27 (27mm) 10 (10mm)
5.5 .6875" 11/16 17mm 21mm 17 (17mm) 17 (17mm) 30mm 30mm 11mm
6 .75" 3/4 19 (19mm) 23 (23mm) 19 (19mm) 19 (19mm) 33 (33mm) 33 (33mm) 13 (13mm)
6.5 .8125" 13/16              
7 .875" 7/8 22mm 27mm 22 (22mm) 22 (22mm) 38mm 38mm 15mm
8 1" 1 25 (25mm) 31 (31mm) 25 (25mm) 25 (25mm) 44 (44mm) 44 (44mm) 17 (17mm)
10 1.25" 1-1/4 32 (32mm) 38mm 31 (31mm) 31 (31mm) 54 (54mm) 54 (54mm) 21 (21mm)
  1.26"       32 (32mm)        
Thickness     (e.g. "CNMG432" / "CCMT32.51")   
ANSI
Code No.
ISO
Code No.
Decimal
Value
Fractional
Value
Millimeter
Value
1 01 0.0625" 1/16 1.59mm
  T1 0.078" 5/64 1.98mm
1.5 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     (e.g. "CNMG432" / "CCMT32.51")   HAUT
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
0.5   0.008"   0.2mm
0 00 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      (e.g. "SEKN42AFTN") 
Code Letter Angle
A 45
D 60
K 60
E 75
L 75
P 0
 
Wiper Clearance Angle     (e.g. "SEKN42AFTN") HAUT
Code Letter Angle
C 7
D 15
E 20
F 25-26
G 30
N 0
P 11
 
Cutting Edge Preparation    (e.g. "SEKN42AFTN") 
Code Letter Edge Preparation
F sharp
E honed
T T-land
S honed T-land
X special chamfer
Cutting Direction      (e.g. "SEKN42AFTN")
Code Letter Direction
R right-hand cutting only
L left-hand cutting only
N both right-hand and left-hand cutting
       
      HAUT
 
 
 
       
         
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