What DCMT 11T302 means, letter by letter: rhombic 55°, positive, 7° clearance, tolerance M, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 9.525 mm, thickness 3.97 mm, nose radius 0.2 mm.
D1C2M3T4115T36027
1 · SHAPERhombic 55°D
2 · CLEARANCE7°C
3 · TOLERANCEClass Mmedium, pressed
4 · TYPET40–60° countersunk hole, chipbreaker one side
5 · SIZE11inscribed Ø 9.525 mm · cutting edge 11.6 mm
6 · THICKNESS3.97 mmT3
7 · NOSE RADIUS0.2 mm02
To scale: top view with the inscribed circle (blue dashes) and, on the right, the side view with the thickness. The grey dashes mark the chipbreaker; its real shape is up to the manufacturer.
DCMT 11T302 dimensions
Inscribed circle IC
9.525 mm
Cutting edge length
11.63 mm
Thickness s
3.97 mm
Nose radius rε
0.2 mm
Corner angle
55°
Clearance angle
7°
Tolerance M
IC ±0.05 · corner height ±0.11 · thickness ±0.13 mm
What DCMT 11T302 tells you on the shop floor
55° corner: gets into shoulders and follows profiles. For semi-finishing and finishing.
Positive insert (7°): lower cutting forces and less chatter. For finishing, boring, thin-walled parts and lighter machines.
Pressed, medium tolerance: economical, fine for roughing and where you do not need repeatability to a few hundredths of a mm at every insert change.
Small radius: lower forces and chatter, good finish at low feed.
Typical holders for DCMT
For a positive rhombic 55° insert the most common ISO 5608 holders are:
SDJCR/L · lead angle 93°
SDNCN · lead angle 62.5°
The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.
Designation to ISO 1832; reference tables: Mitsubishi Materials turning catalogue (insert identification). Holders to ISO 5608. Chipbreaker, grade and cutting data differ between manufacturers: the catalogue of the insert you use is what counts.
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DCMT 11T302: rhombic 55°, positive, 7° clearance, tolerance M, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 9.525 mm, thickness 3.97 mm, nose radius 0.2 mm.
What is the inscribed circle of DCMT 11T302?
9.525 mm, with a 11.6 mm cutting edge.
Which holder takes DCMT 11T302?
An ISO 5608 holder for positive rhombic 55° inserts, for example SDJCR/L or SDNCN.
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