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°)