Mold and die thread mills
Mold & Die Series Thread Mill is engineered for precision threading in pre-hardened and fully hardened tool steels (P20, H13, S136, SKD11/D2, NAK80, 718H up to HRC 62–65). Built from ultra-fine micro-grain solid carbide with a high-temperature resistant AlTiN / TiSiN / AlCrSiN coating, this tool overcomes the brittleness and rapid wear associated with tapping in hard materials—delivering burr-free, go/no-go compliant threads in expensive mold cavities and die blocks.
- ISO 6H / 6G Thread Accuracy – Precision ground profile passes plug & ring gauge inspection; surface finish Ra ≤ 0.8 μm.
- Hardened-Steel Optimized Geometry – Reinforced cutting edge & negative rake design resist micro-chipping in materials ≥ HRC 50; ideal for interrupted cuts in mold bases.
- Internal & External Thread Capable – One tool machines RH/LH internal threads and external threads (by program), blind or through holes.
Technical Specifications
Specification | Details |
Tool Type | Solid Carbide Thread Mill – Mold & Die / High-Hardness Series |
Applicable Hardness | Pre-hardened & Quenched Steel: HRC 48–62 (HRC 65 optional grade) |
Thread Standards | ISO Metric (M), UNC, UNF, UNJC/UNJF, G (BSP Parallel), NPT (on request) |
Thread Size Range | Metric: M1.4 – M30+; Imperial: #0-80 – 1¼" |
Pitch | Coarse / Fine / Special (0.2–3.0 mm / 80–4 TPI) |
Flutes | 1 flute (single-form), 2–4 flutes (multi-tooth), by size |
Cutting Diameter | 1.0 – 28 mm (custom necked shank available) |
Shank Diameter | 3 / 4 / 6 / 8 / 10 / 12 / 16 mm (h6 tolerance, cylindrical) |
Overall Length | 50 / 60 / 75 / 100 / 120 mm (custom on request) |
Helix Angle | 30°–38° (straight or helical flute per geometry) |
Coating | AlTiN (std.), TiSiN / AlCrSiN optional for HRC 60+ |
Coolant | External standard; internal coolant channel optional (selected sizes) |
Tolerance | Ground to ±0.005 mm |
CNC Compatibility | Haas, Makino, DMG Mori, Mazak, Okuma, Fanuc, etc. |
Private label, left-hand thread, necked-down (long reach) shanks, and non-standard pitch available upon request.
Suitable Materials
Material Category | Typical Grades / Designation |
Pre-Hardened Mold Steel | P20 (1.2311), 718H (1.2738), NAK80 |
Through-Hardened Tool Steel | D2 (1.2379 / SKD11), A2, O1, Cr12MoV |
Hot Work Die Steel | H13 (1.2344 / SKD61) — quenched & tempered |
Plastic Mold Steel (Hardened) | S136 (1.2083), 420SS (hardened condition) |
Alloy Steel (Quenched) | 4140 QT, 4340 (≤ HRC 62) |
Carbon Steel (≤ HRC 45) | 45#, 1045 — also performs well |