What DCGT 070202 means, letter by letter: rhombic 55°, positive, 7° clearance, tolerance G, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 6.35 mm, thickness 2.38 mm, nose radius 0.2 mm.
D1C2G3T4075026027
1 · SHAPERhombic 55°D
2 · CLEARANCE7°C
3 · TOLERANCEClass Gtight, ground
4 · TYPET40–60° countersunk hole, chipbreaker one side
5 · SIZE07inscribed Ø 6.35 mm · cutting edge 7.8 mm
6 · THICKNESS2.38 mm02
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.
DCGT 070202 dimensions
Inscribed circle IC
6.35 mm
Cutting edge length
7.75 mm
Thickness s
2.38 mm
Nose radius rε
0.2 mm
Corner angle
55°
Clearance angle
7°
Tolerance G: IC / corner height / thickness
±0.025 / ±0.025 / ±0.13 mm
What DCGT 070202 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.
Ground: a more precise edge, repeatable at every insert change. The choice for finishing and tight tolerances.
Small radius: lower forces and chatter, good finish at low feed.
Typical holders for DCGT
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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DCGT 070202: rhombic 55°, positive, 7° clearance, tolerance G, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 6.35 mm, thickness 2.38 mm, nose radius 0.2 mm.
What is the inscribed circle of DCGT 070202?
6.35 mm, with a 7.8 mm cutting edge.
Which holder takes DCGT 070202?
An ISO 5608 holder for positive rhombic 55° inserts, for example SDJCR/L or SDNCN.
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