RPMT 1204 Milling Inserts
Compare suitable materials and applications, then choose a brand to view the exact SKUs.
- ISO Code
- RPMT1204
- Insert Size
- 1204
- Shape
- R
Find the Right Option
Select the workpiece material and application. Brand remains optional.
Brands
All available options for this parent model.
This page covers every RPMT 1204 insert we can supply — 7 variants across Achteck, published for Steel, Stainless steel, Heat-resistant alloys, Hardened steel. The round geometry gives it many cutting edges and makes it suitable for the strongest edge available — roughing, hard skins, long reach.
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 RPMT 1204.
Geometry and dimensions
| Insert family | RPMT |
|---|---|
| Category | Milling Inserts |
| Shape | round (R) |
| Usable cutting edges | many |
| Inscribed circle (IC) | 12 mm |
| Thickness (S) | 4.76 mm |
| Fixing hole diameter (D1) | 4.4 mm |
| Hand | Neutral |
| Variants in stock | 7 |
| Brands | Achteck |
Cutting data
The 7 variants of RPMT 1204 listed here are supplied without a full published cutting-data set, so we do not publish one. Ask us for the specific grade and chipbreaker you are considering and we will send the manufacturer's window for it.
Carbide grades available
7 variants of RPMT 1204 are stocked in these grades: AP153H, AP151H, AP251U, AP351U, AC451S, AP403S, AP403M.
Across this range the grades specified most often are AP153H, AP151H, AP251U, AP351U, AC451S. 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 RPMT 1204: T1000.
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
- Profile Milling
- Face Milling
- Ramp Milling
- Helical Interpolation
- Pocket Milling
For more on cutting steel, see our material-specific guide.