Copyright (c) 2011, Peter Lyall Easthope. All rights reserved.
Best viewed with a Web browser.
Insert-Designation = Shape , Relief-Angle , Tolerances , Type , [ - ] , Size , Thickness , [ Cutting-Point-Configuration , [ Special-Cutting-Point-Dimension , [ Hand , [ Other-Conditions ] ] ] ] ;
Shape = "R" | "S" | "T" | "A" | "B" | "C" | "D" | "E" | "H" | "K" | "L" | "M" | "O" | "P" | "V" | "W" ;
Relief-Angle = "N" | "A" | "B" | "C" | "P" | "D" | "E" | "F" | "G" | "H" | "J" | "K" | "L" | "M" | "R" | "S" ;
Tolerances = "A" | "B" | "C" | "D" | "E" | "F" | "G" | "H" | "J" | "K" | "L" | "M" | "U" | "N" ;
Type = "A" | "B" | "C" | "F" | "G" | "H" | "J" | "M" | "N" | "Q" | "R" | "T" | "U" | "W" ;
Size = d1 , [ [ "." ] d2 ] ;
Thickness = d , [ d ] ;
Cutting-Point-Configuration = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "A" | "D" | "E" | "F" | "K" | "L" | "M" | "N" | "P" ;
Special-Cutting-Point-Dimension = "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ;
Hand = "R" | "L" ;
Other-Conditions = "A" | "B" | "C" | "J" | "T" ;
| Shape | Description |
|---|---|
| R | round |
| S | square |
| T | triangle |
| A | 85° parallelogram |
| B | 82° parallelogram |
| C | 80° diamond |
| D | 55° diamond |
| E | 75° diamond |
| H | hexagon |
| K | 55° parallelogram |
| L | rectangle |
| M | 86° diamond |
| O | octagon |
| P | pentagon |
| V | 35° diamond |
| W | 80° trigon |
| Relief-Angle | Primary relief angle | Relief angle of secondary facet |
|---|---|---|
| N | 0° | |
| A | 3° | |
| B | 5° | |
| C | 7° | |
| P | 11° | |
| D | 15° | |
| E | 20° | |
| F | 25° | |
| G | 30° | |
| H | 0° | 11° |
| J | 0° | 14° |
| K | 0° | 17° |
| L | 0° | 20° |
| M | 11° | 14° |
| R | 11° | 17° |
| S | 11° | 20° |
| Tolerances | Tolerance +/- | |
|---|---|---|
| Inscribed circle inches | Thickness inches | |
| A | 0.001 | 0.001 |
| B | 0.001 | 0.005 |
| C | 0.001 | 0.001 |
| D | 0.001 | 0.005 |
| E | 0.001 | 0.001 |
| F | 0.0005 | 0.001 |
| G | 0.001 | 0.005 |
| H | 0.0005 | 0.001 |
| J | 0.002-0.005 | 0.001 |
| K | 0.002-0.005 | 0.001 |
| L | 0.002-0.005 | 0.001 |
| M | 0.002-0.004 * | 0.005 |
| U | 0.005-0.010 | 0.005 |
| N | 0.002-0.004 | 0.001 |
| * See ANSI B94.25. | ||
| Type | Hole | Countersinks | Chip groove on rake surface | Chip groove on rake face |
|---|---|---|---|---|
| A | 1 | 0 | 0 | 0 |
| B | 1 | 1 | 0 | 0 |
| C | 1 | 2 | 0 | 0 |
| F | 0 | 0 | 2 | 0 |
| G | 1 | 0 | 2 | 0 |
| H | 1 | 1 | 1 | 0 |
| J | 1 | 2 | 2 | 0 |
| M | 1 | 0 | 1 | 0 |
| N | 0 | 0 | 0 | 0 |
| Q | 1 | 2 | 0 | 0 |
| R | 0 | 0 | 1 | 0 |
| T | 1 | 1 | 0 | 1 |
| U | 1 | 2 | 0 | 2 |
| W | 1 | 1 | 0 | 0 |
| Shape | Dimension designated by Size | Calculation of Size |
|---|---|---|
| Regular polygon or diamond |
Diameter of inscribed circle |
d1 , [ [ "." ] d2 ] , "x 1/8 inch" |
| Rectangle or Parallelogram |
Width | d1 , "x 1/8 inch" |
| Length | d2 , "x 1/4 inch" |
| Calculation of Thickness |
|---|
| d , [ [ "." ] d ] , "x 1/16 inch" |
| Cutting-Point-Configuration | Meaning |
|---|---|
| "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | Radius = Cutting-Point-Configuration , "x 1/64 inch" |
| A | Square insert with 45 chamfer. |
| D | Square insert with 30 chamfer. |
| E | Square insert with 15 chamfer. |
| F | Square insert with 3 chamfer. |
| K | Square insert with 30 double chamfer. |
| L | Square insert with 15 double chamfer. |
| M | Square insert with 3 double chamfer. |
| N | Truncated triangle shape. |
| P | Flatted corner triangle shape. |
| Cutting-Point-Configuration | Calculation of a dimension measured parallel to the edge of the facet, for a special shape of cutting point. |
|---|---|
| "A" | "D" | "E" | "F" | "K" | "L" | "M" | "N" | "P" | Special-Cutting-Point-Dimension , "x 1/64 inch" |
| Hand | Meaning |
|---|---|
| L | Cutting to the left. Toward the headstock of a lathe for example. |
| R | Cutting to the right. Toward the tailstock of a lathe for example. |
| Other-Conditions | Meaning |
|---|---|
| A | Honed with 0.0005" < roughness < 0.003". |
| B | Honed with 0.003" < roughness < 0.005". |
| C | Honed with 0.005" < roughness < 0.007". |
| J | Polished to 0.000004" arithmetic average on on rake surfaces only. |
| T | Chamfered. Standard negative land of manufacturer on the rake surface only. |
| Identifier | Meaning |
|---|---|
| T | Triangle shape |
| P | 11° relief angle |
| G | 0.001 inch tolerance on inscribed circle. 0.005 inch tolerance on thickness. |
| B | i hole, 1 countersink |
| 3 | Diameter of circle = 3 x 1/8" = 3 x 0.125" = 0.375" |
| 2 | Thickness = 2 x 1/16" = 2 x 0.0625" = 0.125" |
| 2 | Radius of point = 2 x 1/64" = 0.0625" |
Best viewed with a Web browser.