SDMT 120412 Milling Inserts
Compare suitable materials and applications, then choose a brand to view the exact SKUs.
- ISO Code
- SDMT120412
- Insert Size
- 120412
- Shape
- S
Find the Right Option
Select the workpiece material and application. Brand remains optional.
Brands
All available options for this parent model.
SDMT 120412 is a square 90° milling insert with 8 usable cutting edges, used mainly for heavy roughing, square shoulders and interrupted cuts. We list 3 stock-keeping variants of it from Achteck, covering Steel, Stainless steel, Cast iron, Heat-resistant alloys.
Milling inserts are chosen to match the cutter body — lead angle, number of teeth and the geometry designated by the manufacturer. The milling insert selection guide walks through that; this page lists what we actually hold in SDMT 120412.
Geometry and dimensions
| Insert family | SDMT |
|---|---|
| Category | Milling Inserts |
| Shape | square 90° (S) |
| Usable cutting edges | 8 |
| Inscribed circle (IC) | 12.7 mm |
| Thickness (S) | 4.76 mm |
| Nose radius (RE) | 1.2 mm |
| Cutting edge length (L) | 10.3 mm |
| Fixing hole diameter (D1) | 5.5 mm |
| Hand | Neutral |
| Variants in stock | 3 |
| Brands | Achteck |
Carbide grades available
3 variants of SDMT 120412 are stocked in these grades: AC301K, AP251U, AP351U.
Across this range the grades specified most often are AC301K, AP251U, AP351U. Within one brand's range, a higher middle digit usually means a tougher grade — better on interrupted cuts, slightly less wear resistant. See carbide grades explained for how to read the names.
Chipbreaker geometries
Chipbreakers stocked for SDMT 120412: MM3.
For milling, the geometry code marks the intended duty — sharper for light cuts and better finish, stronger for scale and interruption. Milling insert selection guide.
Typical applications
- Face Milling
For more on cutting steel, see our material-specific guide.