
MILLING MILLING
INSERT DESIGNATION (BASED ON ISO NORMS)
A 1
P 2
2
K 3
3
T4
4
16 04 PD T R
5 66 77 88 99 10
1. Insert Shape 2. Clearance Angle
5. Cutting Edge Length 6. Insert Thickness 7. Insert Corner Radius
80°
85° 82° 55°
Symbol mm 1st letter (Milling)
α° A, B, K C, D, E, M, V H, O, P
A = 45°
A B C D Letter Symbol α
01 = 1.59 D = 60°
A 3° E = 75°
T1 = 1.98 F = 85°
S
55° B 5° R
L L L P = 90°
C 7° 02 = 2.38 Z = other
G H K L 00 = Sharp corner
D 15° L R S 03 = 3.18 or round insert
(inch version)
2nd letter (Milling)
E 20° T3 = 3.97 M0 = Round insert A = 3°
S
86°
(metric version) B = 5°
F 25° L L L
04 = 4.76 01 = 0.1 mm C = 7°
M O P R 02 = 0.2 mm
G 30° 05 = 5.56 D = 15°
T W 04 = 0.4 mm E = 20°
N 0° 06 = 6.35 08 = 0.8 mm F = 25°
S
35°
S
80°
P 11° 12 = 1.2 mm G = 30°
07 = 7.94 16 = 1.6 mm N = 0°
S T V W O Special L L etc P = 11°
Disregarding any decimals e.g. 12,7 = 12 09 = 9.52
Z = other
3. Tolerance Class 4. Fixing and Chipbreaker Types
8. Edge Preparation 9. Cutting Direction 10. Internal Designation
d (mm)
m (mm) Symbol D M S Type Symbol Type Symbol
s (mm) Milling
A ± 0.025 ± 0.005 ± 0.025
A N F e.g. Application (Milling)
m C ± 0.025 ± 0.013 ± 0.025
R - 45 = 45° Approach Angle
E ± 0.025 ± 0.025 ± 0.025 70°- 90°
B P E - 90 = 90° Approach Angle
Ø
d
F ± 0.013 ± 0.005 ± 0.025 - HF = High Feed
m
G ± 0.025 ± 0.025 ± 0.130 L Optional information
F R T
Ød H ± 0.013 ± 0.013 ± 0.025
40°- 60°
m J* ± 0.05-0.15 ± 0.005 ± 0.025
G T S
K *
± 0.013 ± 0.025 N
± 0.05-0.15
70°- 90° 40°- 60°
L* ± 0.05-0.15 ± 0.025 ± 0.025 Optional information
Ød H W Optional information
M* ± 0.05-0.15 ± 0.08-0.20 ± 0.130
N* ± 0.05-0.15 ± 0.08-0.20 ± 0.025
M X Special Design
s U* ± 0.08-0.25 ± 0.13-0.38 ± 0.130
LT 741 C - W - D016 / 2
* Depending on the insert size.
1 2 3 4 5 6
1. Standard 4. Internal Coolant 5. Diameter 6. # of Teeth
2. Lamina Cutter 3. Coupling
104 Family Number 105
LT - Metric C - Cylindrical D - No Internal D016 = 16 mm 2 = 2 teeth
RILT - Imperial CL - Cylindrical Long Coolant D1000 = 1”