Sandvik RCKT 1204 M0-PH 4220 Round Carbide Milling Insert (10pc)
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The Sandvik Coromant RCKT 1204 M0-PH 4220 is a new, round (circular) positive-geometry carbide milling insert designed for use with the CoroMill 200 face and profile milling system. Grade 4220 is a PVD-coated cemented carbide (TiAlN-based coating, identifiable by the characteristic gold/bronze appearance of the rake face and dark flank) engineered for milling steel (ISO P) and hardened materials (ISO H up to 60 HRC). The RCKT designation decodes as: R = round shape, C = 7° clearance angle, K = tolerance class, T = with chipbreaker, 12 = 12 mm inscribed circle diameter, 04 = 4.76 mm thickness, M0 = medium chipbreaker geometry, PH = peripheral hole for screw clamping. Per the back-label cutting data, recommended feed per tooth (fz) is 0.35 mm (range 0.1–0.42 mm) for both P and H materials, with cutting speed Vc of 255 m/min (840 SFM) for steel (P2.1.Z.AN, 175 HB) and 35 m/min (115 SFM) for hardened steel (H1.3.Z.HA, 60 HRC). This pack contains 6 inserts (as shown) and is made in Sweden; MtrlID 5740466.
Product Specifications
| Brand | Sandvik Coromant |
| Ordering Code | RCKT 1204 M0-PH 4220 |
| Insert Shape | Round (R) |
| Clearance Angle | 7° (C) |
| Tolerance Class | K |
| Inscribed Circle (IC) Diameter | 12 mm |
| Insert Thickness | 4.76 mm |
| Chipbreaker | M0 (Medium) |
| Clamping Method | Peripheral hole, screw clamp (PH) |
| Grade | 4220 |
| Coating Type | PVD TiAlN |
| ISO Material Groups | P (Steel), H (Hardened Steel) |
| Max Hardness (H) | 60 HRC |
| Compatible Tooling System | CoroMill 200 |
| Feed per Tooth (fz) - Recommended | 0.35 mm (range 0.1–0.42 mm) |
| Cutting Speed Vc - Steel (P2.1) | 255 m/min / 840 SFM (range 365–235 m/min) |
| Cutting Speed Vc - Hardened (H1.3) | 35 m/min / 115 SFM (range 55–30 m/min) |
| Quantity per Pack | 6 inserts |
| Country of Origin | Sweden |
| MtrlID | 5740466 |
| Condition | New |