Boring Bar ANSI Designation Chart

S 16 T  
S C L C R –  
3


Boring Bar Type


Bar Dia


Length


Insert Holding


Insert Shape


Boring Bar Style


Insert Relief
L


Hand


Insert IC


S = solid steel bar


03 = 3/16"


F = 3"


M = clamp and lock pin


C = 80 deg. diamond


F = 0º end cutting


N = 0º


R = right hand


1.2 = 5/32"


A = steel bar w/ coolant hole


04 = 1/4"


G = 3 1/2"


P = lock pin only


D = 55 deg. diamond


J = -3º side cutting


A = 3º


L = left hand


1.5 = 3/16"


B = solid steel anti-vib bar


05 = 5/16"


H = 4"


C = clamp only


K = paralellogram


K = 15º end cutting


B = 5º


1.8 = 7/32"


D = steel anti-vib bar w/ coolant hole


06 = 3/8"


J = 4 1/2"


S = screw lock only


L = rectangle


L = -5º side & end cut


C = 7º


2 = 1/4"


C = carbide bar (steel head)


08 = 1/2"


K = 5"


R = round


Q = -17.5º end cutting


P = 11º


2.5 = 5/16"


E = carbide bar (steel head) w/ coolant hole


10 = 5/8"


L = 5 1/2"


S = square


S = 45º end cutting


D = 15º


3 = 3/8"


F = carbide anti-vib bar (steel head)


12 = 3/4"


M = 6"


T = triangle


U = -3º end cutting


E = 20º


4 = 1/2"


G = carbide anti-vib bar (steel head) w/ coolant hole


16 = 1"


N = 6 1/2"


V = 35 deg. diamond


W = -30º end cutting


F = 25º


5 = 5/8"


H = heavy metal bar


20 = 1 1/4"


P = 6 3/4"


W = trigon


Y = 5º end cutting


G = 30º


6 = 3/4"


J = heavy metal bar w/ coolant hole


24 = 1 1/2"


Q = 7"


8 = 1"


28 = 1 3/4"


R = 8"


10 = 1 1/4"


32 = 2"


S = 10"


36 = 2 1/4"


T = 12"


40 = 2 1/2"


U = 14"


V = 16"


W = 18"


Y = 20"


Z = special