D-Type CBN Inserts
55° rhombic PCBN turning inserts for profiling, shoulder access and hard turning. Compare DNGA, DNGM, DCGW, DPGW and DCGT families by negative or positive geometry, tip configuration, long-edge structure and catalog dimensions.
Choose a D-Type PCBN Insert Family
The ONMY catalog covers negative and positive 55° rhombic bodies with standard tips, two-tip versions, long-edge DNGA and chipbreaker DNGM structures.
DNGA / DNMA
Core negative D-type family with 1N and 2N PCBN tip configurations.
Negative · Long EdgeDNGA-L / DNMA-L
Extended PCBN edge length for applications requiring more cutting-edge engagement.
Negative · ChipbreakerDNGM / DNMM
Negative D-type family with chipbreaker geometry and 1N PCBN tip structure.
PositiveDCGW / DCMW
Positive D-type family available in both 1N and 2N PCBN tip configurations.
PositiveDPGW / DPMW
Positive 55° rhombic family for compact profiling and lower-force cutting setups.
PositiveDCGT / DCMT
Positive D-type family with 1N tip configuration in compact 0702 and 11T3 sizes.
Select D-Type Geometry by Access and Stability
The 55° rhombic shape provides more profile and shoulder access than a broader C-type insert. Choose negative or positive geometry according to holder style, cutting force, component access and edge support.
Negative D-Type
DNGA / DNMA and DNGM / DNMM use a negative 55° rhombic body for stable external turning and profiling.
- 1N and 2N DNGA / DNMA configurations
- DNGA-L / DNMA-L long-edge option
- DNGM / DNMM chipbreaker family
- 1104, 1504 and 1506 catalog sizes
Positive D-Type
DCGW / DCMW, DPGW / DPMW and DCGT / DCMT use positive 55° rhombic bodies.
- Useful where lower cutting force or internal access matters
- Compact 0702 and 11T3 sizes
- Selected DCGW / DCMW 2N versions
- 0.2, 0.4 and 0.8 mm nose-radius options in the catalog
D-Type CBN Insert Size Matrix
Filter by family, size or tip structure. Dimension symbols follow the ONMY PCBN catalog drawing; all dimensions below are in millimeters.
| Family | Size | Tip / Edge | d | d1 | s | l | l1 | r |
|---|---|---|---|---|---|---|---|---|
| DNGA / DNMA | 110404 | 1N | 9.525 | 3.81 | — | 11.5 | 4.3 | 0.4 |
| DNGA / DNMA | 110408 | 1N | 9.525 | 3.81 | — | 11.1 | 4.1 | 0.8 |
| DNGA / DNMA | 150404 | 1N | 12.7 | 5.16 | 4.76 | 15.2 | 4.3 | 0.4 |
| DNGA / DNMA | 150408 | 1N | 12.7 | 5.16 | 4.76 | 14.8 | 4.1 | 0.8 |
| DNGA / DNMA | 150416 | 1N | 12.7 | 5.16 | 4.76 | 14.0 | 3.8 | 1.6 |
| DNGA / DNMA | 150604 | 1N | 12.7 | 5.16 | 6.35 | 15.2 | 4.3 | 0.4 |
| DNGA / DNMA | 150608 | 1N | 12.7 | 5.16 | 6.35 | 14.8 | 4.1 | 0.8 |
| DNGA / DNMA | 150616 | 1N | 12.7 | 5.16 | 6.35 | 14.0 | 3.8 | 1.6 |
| DNGA-L / DNMA-L | 150404 | Long Edge · 1N | 12.7 | 5.16 | 4.76 | 15.2 | 5.8 | 0.4 |
| DNGA-L / DNMA-L | 150408 | Long Edge · 1N | 12.7 | 5.16 | 4.76 | 14.8 | 5.4 | 0.8 |
| DNGA-L / DNMA-L | 150416 | Long Edge · 1N | 12.7 | 5.16 | 4.76 | 14.0 | 5.0 | 1.6 |
| DNGA-L / DNMA-L | 150604 | Long Edge · 1N | 12.7 | 5.16 | 6.35 | 15.2 | 5.8 | 0.4 |
| DNGA-L / DNMA-L | 150608 | Long Edge · 1N | 12.7 | 5.16 | 6.35 | 14.8 | 5.4 | 0.8 |
| DNGA-L / DNMA-L | 150616 | Long Edge · 1N | 12.7 | 5.16 | 6.35 | 14.0 | 5.0 | 1.6 |
| DNGA / DNMA | 110404 | 2N | 9.525 | 3.81 | 4.76 | 11.5 | 4.3 | 0.4 |
| DNGA / DNMA | 110408 | 2N | 9.525 | 3.81 | 4.76 | 11.1 | 4.1 | 0.8 |
| DNGA / DNMA | 150404 | 2N | 12.7 | 5.16 | 4.76 | 15.2 | 4.3 | 0.4 |
| DNGA / DNMA | 150408 | 2N | 12.7 | 5.16 | 4.76 | 14.8 | 4.1 | 0.8 |
| DNGA / DNMA | 150416 | 2N | 12.7 | 5.16 | 4.76 | 14.0 | 3.8 | 1.6 |
| DNGA / DNMA | 150604 | 2N | 12.7 | 5.16 | 6.35 | 15.2 | 4.3 | 0.4 |
| DNGA / DNMA | 150608 | 2N | 12.7 | 5.16 | 6.35 | 14.8 | 4.1 | 0.8 |
| DNGA / DNMA | 150616 | 2N | 12.7 | 5.16 | 6.35 | 14.0 | 3.8 | 1.6 |
| DNGM / DNMM | 110404 | Chipbreaker · 1N | 9.525 | 3.81 | 4.76 | 11.5 | 4.3 | 0.4 |
| DNGM / DNMM | 110408 | Chipbreaker · 1N | 9.525 | 3.81 | 4.76 | 11.1 | 4.1 | 0.8 |
| DNGM / DNMM | 150404 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 15.2 | 4.3 | 0.4 |
| DNGM / DNMM | 150408 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 14.8 | 4.1 | 0.8 |
| DNGM / DNMM | 150416 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 14.0 | 3.8 | 1.6 |
| DNGM / DNMM | 150604 | Chipbreaker · 1N | 12.7 | 5.16 | 6.35 | 15.2 | 4.3 | 0.4 |
| DNGM / DNMM | 150608 | Chipbreaker · 1N | 12.7 | 5.16 | 6.35 | 14.8 | 4.1 | 0.8 |
| DNGM / DNMM | 150616 | Chipbreaker · 1N | 12.7 | 5.16 | 6.35 | 14.0 | 3.8 | 1.6 |
| DCGW / DCMW | 070202 | 1N | 6.35 | 2.8 | 2.38 | 7.9 | 3.4 | 0.2 |
| DCGW / DCMW | 070204 | 1N | 6.35 | 2.8 | 2.38 | 7.7 | 3.2 | 0.4 |
| DCGW / DCMW | 070208 | 1N | 6.35 | 2.8 | 2.38 | 7.3 | 3.0 | 0.8 |
| DCGW / DCMW | 11T304 | 1N | 9.525 | 4.4 | 3.97 | 11.5 | 4.3 | 0.4 |
| DCGW / DCMW | 11T308 | 1N | 9.525 | 4.4 | 3.97 | 11.1 | 4.1 | 0.8 |
| DCGW / DCMW | 070202 | 2N | 6.35 | 2.8 | 2.38 | 7.9 | 3.4 | 0.2 |
| DCGW / DCMW | 070204 | 2N | 6.35 | 2.8 | 2.38 | 7.7 | 3.2 | 0.4 |
| DCGW / DCMW | 070208 | 2N | 6.35 | 2.8 | 2.38 | 7.3 | 3.0 | 0.8 |
| DCGW / DCMW | 11T304 | 2N | 9.525 | 4.4 | 3.97 | 11.5 | 4.3 | 0.4 |
| DCGW / DCMW | 11T308 | 2N | 9.525 | 4.4 | 3.97 | 11.1 | 4.1 | 0.8 |
| DPGW / DPMW | 070202 | 1N | 6.35 | 2.8 | 2.38 | 7.9 | 3.4 | 0.2 |
| DPGW / DPMW | 070204 | 1N | 6.35 | 2.8 | 2.38 | 7.7 | 3.2 | 0.4 |
| DPGW / DPMW | 070208 | 1N | 6.35 | 2.8 | 2.38 | 7.3 | 3.0 | 0.8 |
| DPGW / DPMW | 11T304 | 1N | 9.525 | 4.4 | 3.97 | 11.5 | 4.3 | 0.4 |
| DPGW / DPMW | 11T308 | 1N | 9.525 | 4.4 | 3.97 | 11.1 | 4.1 | 0.8 |
| DCGT / DCMT | 070202 | 1N | 6.35 | 2.8 | 2.38 | 7.9 | 3.4 | 0.2 |
| DCGT / DCMT | 070204 | 1N | 6.35 | 2.8 | 2.38 | 7.7 | 3.2 | 0.4 |
| DCGT / DCMT | 070208 | 1N | 6.35 | 2.8 | 2.38 | 7.3 | 3.0 | 0.8 |
| DCGT / DCMT | 11T304 | 1N | 9.525 | 4.4 | 3.97 | 11.5 | 4.3 | 0.4 |
| DCGT / DCMT | 11T308 | 1N | 9.525 | 4.4 | 3.97 | 11.1 | 4.1 | 0.8 |
The table reproduces the D-type dimensional symbols from the product catalog. Grade availability is not shown in this matrix because it varies by exact size and tip structure.
Choose the D-Type PCBN Tip Configuration
D-type inserts offer a distinct long-edge option in addition to standard tip-count and chipbreaker structures. Select the structure together with profile access, edge engagement and cutting continuity.
1-Tip
Single localized PCBN tip across negative and positive D-type families.
2-Tip
Two usable tips in selected DNGA / DNMA and DCGW / DCMW configurations.
Long Edge
DNGA-L / DNMA-L increases catalog l1 from the standard D-type tip length for more PCBN edge engagement.
Chipbreaker
DNGM / DNMM adds chipbreaker geometry to the negative 55° rhombic platform.
Match the Grade to the Workpiece and Cut
D-type inserts are available across multiple PCBN grade directions. Select the grade after the insert family, workpiece material and cutting continuity are known.
OBN45
Wear-focused direction for continuous to moderately interrupted hard turning and fine finishing.
O2C50
Abrasion-resistant direction for continuous to lightly interrupted hard machining.
OBW85
High-CBN direction for abrasive workpieces, selected cast-iron applications and demanding interruption.
Confirm by Code
Exact grade availability changes by size and PCBN structure. Confirm the final grade with the selected insert code.
Where D-Type PCBN Inserts Fit
D-type geometry is selected when the component needs more profile access than a broader insert shape, while the PCBN grade and edge structure are chosen by workpiece and cutting continuity.
Hard Turning & Profiling
Use D-type access for hardened-steel profiles, shoulders and contours, then select the grade by hardness and interruption.
CBN Inserts for Hard Turning →Cast Iron Machining
Use positive or negative D-type bodies where cast-iron component access and profile geometry require a 55° rhombic insert.
CBN Inserts for Cast Iron →CBN Tipped Structures
Compare 1N, 2N, long-edge and other brazed PCBN structures across the wider CBN insert range.
Browse CBN Tipped Inserts →What to Send for D-Type Insert Selection
Send the complete insert requirement and machining condition so the size, tip structure and grade can be checked together.
Request D-Type PCBN Inserts
Send the insert code, workpiece material, cutting condition and quantity. We can review the compatible D-type family, PCBN structure and grade.
- Current DNGA / DNGM / DCGW / DPGW / DCGT code
- Required 1N / 2N / long-edge / chipbreaker structure
- Workpiece material and hardness
- Continuous or interrupted cutting condition
- Current tool life or surface-finish target
- Trial quantity and estimated demand
