Turning External Machining
External Turning Toolholder Denomination System
DCLNR 20 20 K12 Other Remarks
1
2
3
4
5
8
9
-
Height of Shank Width of Shank
3- Approaching Angle
1- Clamping Type A：Back clamping C：Top clamping D：Double clamping M：Multiple clamping P：Lever clamping S：Screw clamping W：Wedge clamping
2- Insert Shape C：80° Rhombic
D：55° Rhombic
90°
75°
95°
63°
95°
R：Round
S：90° Square
A
B
L
N
T：60° Triangle
V：35° Rhombic
W：80° Trigon
90°
45°
75°
117.5°
C
D
P
R
4- Clearance Angle
5-Hand of Tool
45°
60°
90°
60°
B： 5° positive angle
C： 7° positive angle
R： Right hand
E
F
S
T
D： 15° positive angle
E： 20° positive angle
L： Left hand
93°
90°
72.5°
G
H
U
V
107.5°
N： 0° negative angle
P： 11° positive angle
N： Left Neutral
75°
93°
60°
85°
J
K
W
Y
8- Toolholder Length
9- Length of Cutting Edge
A: 32
B: 40
C: 50
D: 60
E: 70
F: 80
G: 90
H: 100
S
R
L
L
L
T
J: 110
K: 125
L: 140
M: 150 N: 160 P: 170 Q: 180 R: 200
C
D
V
R: 200 S: 250 T: 300 U: 350
V: 400 W: 450
L
L
L
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