A = Parallelogram 85° B = Lovejoy Ball Nose C = Diamond 80° D = Diamond 55° F = Parallelogram 88° H = Hexagon K = Parallelogram 87° L = Rectangle M = Diamond 86° O = Octagon P = Pentagon R = Round S = Square T = Triangle V = Diamond 35° Z = Trapezium
2 Clearance (C)
N = 0° P = 11° D = 16° Z = 18° E = 20° H = 0°/11° J = 0°/15°
3 Tolerance
Inscribed Circle
Thickness
A = .0002"
.001"
B = .0002"
.005"
C = .0005"
.001"
E = .001"
.001"
F = .002" - .004"
.002"
G = .001"
.005"
M = .002" - .004"
.005"
U = .005" - .012"
.005"
X = .003"
.001"
R = Grind Stock all surfaces
S = Grind Stock top & bottom
4 Type
A = with hole B = with hole & countersink 70°-90° E = smaller than 1/4" IC G = with hole & chipbreaker H = with hole, countersink & chip groove N = no hole or chipbreaker P = 10° positive land with hole & chipbreaker V = with chipbreaker in cutting edge W = with hole & countersink 40°-60°
5 Size (IC)
Shapes R, S, T, Z, M, C, D, H, O, P and V the figure represents the number of 1/8" in IC
Shapes L, F, A, B, and K the first digit represents the number of 1/8" in width. The second digit represents the number of 1/4" in length.
Shapes less than 1/4" IC figure represents the number of 1/32" in IC.
6 Thickness (T)
Figure represents the number of 1/16"
Shapes less than 1/4" IC figure represents the number of 1/32"
7 Cutting Point (R)
0 = Sharp Corner 1 = 1/64" radii 2 = 1/32" radii 3 = 3/64" radii 4 = 1/16" radii 6 = 3/32" radii 8 = 1/8" radii A = 45° chamfer AF = 45° edge & 25° relief D = 30° chamfer, RH E = 15° chamfer, RH G = 30° chamfer, LH H = 15° chamfer, LH K = 30° double chamfer L = 15° double chamfer N = Truncated triangle X = 1° chamfer, RH Y = 1° chamfer, LH Z = 1° double chamfer
8 Other Conditions (355-EI-1)
A = Ground all over, light hone = .001 - .002R Hone B = Ground all over, heavy hone = .003 - .005R Hone C = Ground top & bottom, light hone = .001 - .002R Hone D = Ground top & bottom, heavy hone = .003 - .005R Hone E = Unground, heavy hone = .003 - .005R Hone J = Polished top face = Sharp Corner L = Left hand M = Extra corner clearance N = R and L rotated R = Right hand T = Chamfered cutting edge = .03 x 11° K-Land V = Chamfered cutting edge, heavy honed = .03 x 11° K-Land & .003 - .005 Hone
W = Chamfered cutting edge specifications = Specified Land Width (i.e. W520 = .005" wide land x 20°)
