S-Type CBN Inserts
Square PCBN turning inserts for stable hard turning and cast-iron machining. Compare SNGA, SNGM, SCGW and SPGW families by negative or positive geometry, tip count, entire-edge or full-face structure and catalog dimensions.
Choose a Square PCBN Insert Family
The ONMY catalog includes negative and positive square bodies with standard tips, multiple tips, entire-edge, chipbreaker and selected full-face configurations.
SNGA / SNMA
Core negative square family with 1N and 2N PCBN tip configurations.
Negative · Entire EdgeSNGA-E / SNMA-E
Entire-edge square PCBN structure for greater edge engagement than a localized tip.
Negative · ChipbreakerSNGM / SNMM
Negative square family with chipbreaker geometry and 1N PCBN tip structure.
PositiveSCGW / SCMW
Positive square family with standard, entire-edge and selected full-face structures.
PositiveSPGW / SPMW
Positive square family with standard 1N and entire-edge PCBN configurations.
Positive · Full FaceSCGW-F / SCMW-F
Cataloged full-face square PCBN construction in selected 09T3 and 1204 sizes.
Select Negative or Positive S-Type Geometry
Square inserts provide a robust cutting body and multiple orientation options. Choose negative or positive geometry according to holder style, cutting force, workpiece access and required edge support.
Negative S-Type
SNGA / SNMA and SNGM / SNMM use a negative square body for stable external turning, facing and hard finishing.
- 1N and 2N SNGA / SNMA structures
- SNGA-E / SNMA-E entire-edge versions
- SNGM / SNMM chipbreaker family
- 1204, 1506 and 1906 catalog sizes
Positive S-Type
SCGW / SCMW and SPGW / SPMW use positive square bodies for lower-force or access-sensitive setups.
- Standard 1N positive PCBN tips
- SCGW-E / SCMW-E and SPGW-E / SPMW-E entire-edge versions
- SCGW-F / SCMW-F full-face construction in selected sizes
- 09T3 and 1204 catalog sizes
S-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 |
|---|---|---|---|---|---|---|---|---|
| SNGA / SNMA | 120404 | 1N | 12.7 | 5.16 | 4.76 | 12.7 | 4.4 | 0.4 |
| SNGA / SNMA | 120408 | 1N | 12.7 | 5.16 | 4.76 | 12.7 | 4.2 | 0.8 |
| SNGA / SNMA | 120416 | 1N | 12.7 | 5.16 | 4.76 | 12.7 | 3.8 | 1.6 |
| SNGA / SNMA | 150608 | 1N | 15.875 | 6.35 | 6.35 | 15.8 | 4.2 | 0.8 |
| SNGA / SNMA | 150616 | 1N | 15.875 | 6.35 | 6.35 | 15.8 | 3.8 | 1.6 |
| SNGA / SNMA | 190608 | 1N | 19.05 | 6.35 | 6.35 | 19.0 | 4.3 | 0.8 |
| SNGA / SNMA | 190616 | 1N | 19.05 | 6.35 | 6.35 | 19.0 | 4.1 | 1.6 |
| SNGA / SNMA | 120404 | 2N | 12.7 | 5.16 | 4.76 | 12.7 | 4.4 | 0.4 |
| SNGA / SNMA | 120408 | 2N | 12.7 | 5.16 | 4.76 | 12.7 | 4.2 | 0.8 |
| SNGA / SNMA | 120416 | 2N | 12.7 | 5.16 | 4.76 | 12.7 | 3.8 | 1.6 |
| SNGA / SNMA | 150608 | 2N | 15.875 | 6.35 | 6.35 | 15.8 | 4.2 | 0.8 |
| SNGA / SNMA | 150616 | 2N | 15.875 | 6.35 | 6.35 | 15.8 | 3.8 | 1.6 |
| SNGA / SNMA | 190608 | 2N | 19.05 | 6.35 | 6.35 | 19.0 | 4.3 | 0.8 |
| SNGA / SNMA | 190616 | 2N | 19.05 | 6.35 | 6.35 | 19.0 | 4.1 | 1.6 |
| SNGA-E / SNMA-E | 120404 | Entire Edge · E | 12.7 | 5.16 | 4.76 | 12.7 | — | 0.4 |
| SNGA-E / SNMA-E | 120408 | Entire Edge · E | 12.7 | 5.16 | 4.76 | 12.7 | — | 0.8 |
| SNGA-E / SNMA-E | 120416 | Entire Edge · E | 12.7 | 5.16 | 4.76 | 12.7 | — | 1.6 |
| SNGA-E / SNMA-E | 150608 | Entire Edge · E | 15.875 | 6.35 | 6.35 | 15.8 | — | 0.8 |
| SNGA-E / SNMA-E | 150616 | Entire Edge · E | 15.875 | 6.35 | 6.35 | 15.8 | — | 1.6 |
| SNGM / SNMM | 120404 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 12.7 | 4.4 | 0.4 |
| SNGM / SNMM | 120408 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 12.7 | 4.2 | 0.8 |
| SNGM / SNMM | 120416 | Chipbreaker · 1N | 12.7 | 5.16 | 4.76 | 12.7 | 3.8 | 1.6 |
| SNGM / SNMM | 150608 | Chipbreaker · 1N | 15.875 | 6.35 | 6.35 | 15.8 | 4.2 | 0.8 |
| SNGM / SNMM | 150616 | Chipbreaker · 1N | 15.875 | 6.35 | 6.35 | 15.8 | 3.8 | 1.6 |
| SNGM / SNMM | 190608 | Chipbreaker · 1N | 19.05 | 6.35 | 6.35 | 19.0 | 4.3 | 0.8 |
| SNGM / SNMM | 190616 | Chipbreaker · 1N | 19.05 | 6.35 | 6.35 | 19.0 | 4.1 | 1.6 |
| SCGW / SCMW | 09T302 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.5 | 0.2 |
| SCGW / SCMW | 09T304 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.4 | 0.4 |
| SCGW / SCMW | 09T308 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.2 | 0.8 |
| SCGW / SCMW | 09T316 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 3.8 | 1.6 |
| SCGW / SCMW | 120404 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 4.4 | 0.4 |
| SCGW / SCMW | 120408 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 4.2 | 0.8 |
| SCGW / SCMW | 120416 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 3.8 | 1.6 |
| SPGW / SPMW | 09T302 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.5 | 0.2 |
| SPGW / SPMW | 09T304 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.4 | 0.4 |
| SPGW / SPMW | 09T308 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 4.2 | 0.8 |
| SPGW / SPMW | 09T316 | 1N | 9.525 | 4.4 | 3.97 | 9.5 | 3.8 | 1.6 |
| SPGW / SPMW | 120404 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 4.4 | 0.4 |
| SPGW / SPMW | 120408 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 4.2 | 0.8 |
| SPGW / SPMW | 120416 | 1N | 12.7 | 5.5 | 4.76 | 12.7 | 3.8 | 1.6 |
| SCGW-E / SCMW-E | 09T304 | Entire Edge · E | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.4 |
| SCGW-E / SCMW-E | 09T308 | Entire Edge · E | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.8 |
| SCGW-E / SCMW-E | 120404 | Entire Edge · E | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.4 |
| SCGW-E / SCMW-E | 120408 | Entire Edge · E | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.8 |
| SPGW-E / SPMW-E | 09T304 | Entire Edge · E | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.4 |
| SPGW-E / SPMW-E | 09T308 | Entire Edge · E | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.8 |
| SPGW-E / SPMW-E | 120404 | Entire Edge · E | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.4 |
| SPGW-E / SPMW-E | 120408 | Entire Edge · E | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.8 |
| SCGW-F / SCMW-F | 09T304 | Full Face · F | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.4 |
| SCGW-F / SCMW-F | 09T308 | Full Face · F | 9.525 | 4.4 | 3.97 | 9.5 | — | 0.8 |
| SCGW-F / SCMW-F | 120404 | Full Face · F | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.4 |
| SCGW-F / SCMW-F | 120408 | Full Face · F | 12.7 | 5.5 | 4.76 | 12.7 | — | 0.8 |
The table reproduces the S-type dimensional symbols from the product catalog. Grade availability is not shown here because it varies by exact size and PCBN structure.
Choose the S-Type PCBN Structure
Square CBN inserts in the catalog include localized tips, entire-edge versions, chipbreaker geometry and a selected full-face positive family.
1-Tip
Single localized PCBN cutting tip across negative and positive S-type families.
2-Tip
Two usable tips in the SNGA / SNMA negative square family.
Entire Edge
Available in SNGA-E, SCGW-E and SPGW-E families where more PCBN edge engagement is required.
Full Face
SCGW-F / SCMW-F is the cataloged positive square full-face PCBN family.
Chipbreaker
SNGM / SNMM adds chipbreaker geometry to the negative square platform.
Core Size
SNGA1204 and positive 1204 families cover several common 0.4, 0.8 and 1.6 mm nose-radius options.
Larger Negative Size
SNGA and SNGM extend into 1506 sizes for a larger negative square body.
Large Square Body
Selected SNGA and SNGM families extend to 1906 sizes in the catalog.
Match the Grade to Material and Interruption
S-type inserts are available across multiple PCBN grade directions. Select the grade after the exact size, structure, 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 S-Type PCBN Inserts Fit
Square geometry is useful where a robust insert body and stable cutting engagement are important. The actual PCBN grade and structure still depend on workpiece and cutting continuity.
Hard Turning
Use SNGA and related square families for stable external turning and facing, then select grade and edge condition by hardness and interruption.
CBN Inserts for Hard Turning →Cast Iron Machining
Use negative or positive square bodies where cast-iron turning, boring or abrasive wear favors a stable square insert platform.
CBN Inserts for Cast Iron →CBN Tipped Structures
Compare 1N, 2N and entire-edge tipped structures across the broader CBN insert range.
Browse CBN Tipped Inserts →What to Send for S-Type Insert Selection
Send the complete insert requirement and machining condition so the size, PCBN structure and grade can be checked together.
Request S-Type PCBN Inserts
Send the insert code, workpiece material, cutting condition and quantity. We can review the compatible square PCBN family, structure and grade.
- Current SNGA / SNGM / SCGW / SPGW code
- Required 1N / 2N / entire-edge / full-face / chipbreaker structure
- Workpiece material and hardness
- Continuous or interrupted cutting condition
- Current tool life or surface-finish target
- Trial quantity and estimated demand
