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 PCD & CBN Inserts

 
J&M Diamond Tool's uses the ANSI indexable insert numbering system. 
These seven and eight digit systems are presented here in an interactive format explaining each of the digits.
  
For Indexable  Insert Numbers  For Milling Cutter  Indexable Inserts

For Indexable Insert Numbers

This system is an eight digit system
J&M Diamond Tool Indexable insert chart
1st  2nd 3rd  4th  5th 6th 7th 8th
Position  Position Position Tolerance Position* Position  Position  Position  Position*
Letter Letter Letter Letter Number Number Number or Letter Letter
Shape Clearance Class Type Size Thickness Cutting Point
Radius or Flats
Other
Conditions
R - Round 
S - Square 
T - Triangle 
P - Pentagon
D - Diamond 55° 
C - Diamond 80° 
O - Octagon
H - Hexagon
L - Rectangle
M- Diamond 86° 
A - Parallelogram 85°
B - Parallelogram 82°
E - Parallelogram 55°
F - Parallelogram 70°
V - Diamond 35°
N - 0°
A - 3°
B - 5°
C - 7°
P - 11°
D - 15°
E - 20°
F - 25°
G - 30°
Cutting

Point

Thickness
A  ± .0002  ± .001 
± .0002 ± .005
± .0005 ± .001
± .0005 ± .005
E   ± .001  ± .001
G  ± .001  ± .005
**M   ± .002 to 
   ± 005 
 ± .005
**U  ± .005 to 
  ±.021 
± .005
**Exact tolerance to be 
determined by size of insert.
A - With hole
B - With hole and one countersink
C - With hole and two countersink
F - Clamp-on type with chipbreaker
G - With hole and 
chipbreaker
H - With hole, one countersink and 
chipbreaker
J - With hole, two countersink and 
chipbreaker
Size 1/4" and 
over use - Number of 
1/8ths in size
For Rectangular
and Parallelogram
use two digits; 
number of 1/8ths in width and 1/4ths in length
Size 1/4" and 
over use - 
Number of 1/16ths in thickness
0 sharp corner
1 1/64 radius
2 1/32 radius
3 3/64 radius
4 1/16 radius
6 3/32 radius
8 1/8 radius
A Square insert
with 45° chamfer
 
A - Ground all over - light honed
B- Ground all over - heavy honed
C - Ground top and bottom only - light honed
D - Ground top and bottom only - heavy honed
E - Unground insert- honed
F - Unground insert - not honed
T - chamfer- cutting edge
 
4th and 8th Position * Shall be used only when required
Indexable Insert Numbers System  Example
1st Position Shape 2nd Position Clearance 3rd Position Tolerance
Example is "T" for Triangle.  Example is "N" for 0°.  Example is "M" for ±.005 on 
I.C. ±.005 on thickness.

For Milling Cutter Indexable Inserts

This system is a seven digit system

J&M Diamond Tool milling insert chart
1st 2nd 3rd  4th 5th 6th 7th
 Position Position Position Tolerance  Position  Position  Position  Position
Letter Letter Letter Number Number Number or 
Letter
Number
Shape Clearance Tolerance Size Thickness  Corner 
Condition
Radius or 
Chamfer size 
M - diamond 
86°
S - square
H - hexagon
N - 0° 
P - 11°
H - 0° sides 
and 11° chamfers
E - 20°
Cutting Point Thickness
C  ± .0005 ± .001 
E   ± .001 ± .001 
G   ± .001 ± .005 
N   ± .014, 
      + .020
± .001 
 
Number of 1/8 in 
I.C. size
Number of 1/32 in  thickness 
R - Radius 
A - 45° Chamfer
D - 30° Chamfer - R.H. 
E - 15° Chamfer - R.H.
G - 30° Chamfer - L.H
H - 15° Chamfer - L.H.
K - 30° Double Chamfer 
L - 15° Double Chamfer 
W - 3° Double Chamfer 
Number of  1/64ths in size
Indexable Insert Numbers System  Example
1st Position Shape 2nd Position Clearance 3rd Position Tolerance
Example is "M" for "diamond 86°" Example is "N" for "0°" The part number example is "C" for 
"cutting point ± .0005, thickness ± .001"

 
Other Standard Inserts Available with PCD or CBN
CCMM CPGM DNGP EPMT SCMT SNE TBEA TFG TPGA VCMW
CCMT CPMA DNMG NPL SCMW SNEA TBEE TM TPGM VNGA
CCMW CPMT DNMM NPR SDE SNMA TBGD TNC TPMA VNGP
CDCD CPMW DNMP NPT SDEB SNMG TBGE TNEA TPMC VNMG
CNG DCMM DPG NT SEEN SNMM TCMM TNMA TPMM VNMP
CNGA DCMT DPGA NTB SEG SPC TCMT TNMC TPMT VPGA
CNMG DCMW DPGR PM SFA SPCE TCMW TNMG TPMW VPGR
CNMM DDG DPGT PNC SFE SPE TD TPC TPV VPMA
CNMP DDGA DPMT PNG SFG SPEA TDED TPCE TX VPMT
CPGA DDGB DPMW PPC SM SPMA TEC TPEA U3 VTGA
CPGB DNEA DTGA PPG SNC SPMW TEEN TPEE VCMT  

Some CBN Inserts  are available in Mini Tips & Double Mini Tips


J & M DIAMOND TOOL, INC.
Toll Free ( 800 ) 777-6813 - - Fax ( 401 ) 431-2222

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             Updated 22 June 2006