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3.Symbol for Tolerance Class

D1-1D1-2S1 Triangular insert with a facet
Triangular insert with a facet
(Secondary Cutting Edge)

Symbol Tolerance of Nose Height
m(inch)		 Tolerance of Inscribed Circle
øD1 (inch)		 Tolerance of Thickness
S1 (inch)
A ±.0002 ±.001 ±.001
F ±.0002 ±.0005 ±.001
C ±.0005 ±.001 ±.001
H ±.0005 ±.0005 ±.001
E ±.001 ±.001 ±.001
G ±.001 ±.001 ±.005
J ±.002 ±.002 ±.005
K* ±.0005 ±.002 - ±.006 ±.001
L* ±.001 ±.002 - ±.006 ±.001
M* ±.003 - ±.007 ±.002 - ±.006 ±.005
N* ±.003 - ±.007 ±.002 - ±.006 ±.001
U* ±.005 - ±.015 ±.003 - ±.01 ±.005

*As a rule, the sides of these inserts are as sintered.
Tolerance differs with insert size. For the accuracy of class M, refer to the table on the right.

Detail of M Class Insert Tolerance

Tolerance of Nose Height m(inch)
.I.C. Triangular Square Rhombic 80° Rhombic 55° Rhombic 35° Round
.250 ±.003 ±.003 ±.003 ±.004 ±.0063 -
.375 ±.003 ±.003 ±.003 ±.004 ±.0063 -
.500 ±.005 ±.005 ±.005 ±.006 - -
.625 ±.006 ±.006 ±.006 ±.007 - -
.750 ±.006 ±.006 ±.006 ±.007 - -
1.000 - ±.007 - - - -
1.250 - ±.008 - - - -
Tolerance of Inscribed Circle øD1(inch)
.I.C. Triangular Square Rhombic 80° Rhombic 55° Rhombic 35° Round
.250 ±.002 ±.002 ±.002 ±.002 ±.002 ±.002
.375 ±.002 ±.002 ±.002 ±.002 ±.002 ±.003
.500 ±.003 ±.003 ±.003 ±.003 - ±.004
.625 ±.004 ±.004 ±.004 ±.004 - ±.004
.750 ±.004 ±.004 ±.004 ±.004 - ±.005
1.000 - ±.005 - - - ±.006
1.250 - ±.006 - - - -