Toolholder ANSI Designation Chart

M W L N R 16 4 D


Insert Holding


Insert Shape


Toolholder Style


Insert Relief
L


Hand


Shank Size


Insert IC


Length


M = clamp and lock pin


C = 80 deg. diamond


A = 0º side cutting, straight shank


N = 0º


R = right hand


5 = 5/16 x 5/16


1.2 = 5/32"


A = 4"


P = lock pin only


D = 55 deg. diamond


B = 15º side cutting, straight shank


A = 3º


L = left hand


6 = 3/8 x 3/8


1.5 = 3/16"


B = 4.5"


C = clamp only


K = paralellogram


C = 0º end cutting, straight shank


B = 5º


N = neutral


8 = 1/2 x 1/2


1.8 = 7/32"


C = 5"


S = screw lock only


L = rectangle


D = 45º side cutting, straight shank


C = 7º


10 = 5/8 x 5/8


2 = 1/4"


D = 6"


R = round


F = 0º end cutting, offset shank


P = 11º


12 = 3/4 x 3/4


2.5 = 5/16"


E = 7"


S = square


G = 0º side cutting, offset shank


D = 15º


16 = 1 x 1


3 = 3/8"


F = 8"


T = triangle


J = -3º side cutting, offset shank


E = 20º


85 = 1 1/4 x 1


4 = 1/2"


M = 4"


V = 35 deg. diamond


K = 15º end cutting, offset shank


F = 25º


20 = 1 1/4 x 1 1/4


5 = 5/8"


N = 4.5"


W = trigon


L = 5º side & end cut, offset shank


G = 30º


24 = 1 1/2 x 1 1/2


6 = 3/4"


P = 5"


M = 40º side cutting, straight shank


86 = 1 1/2 x 1


8 = 1"


R = 6"


N = 27º side cutting, straight shank


32 = 2 x 2


10 = 1 1/4"


S = 7"


R = 15º side cutting, offset shank


T = 8"


S = 45º side cutting, offset shank


T = 30º side cutting, offset shank


U = -3º end cutting, offset shank


V = 17.5º side cut, straight shank

Y = 50º side cutting,
straight shank