Seco S545-0.750-D1-S.0-Z5 ALTIN 3/4in 5-Flute Carbide Square End Mill
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This is a new Seco Tools S545 series solid carbide square end mill, MPN S545-0.750-D1-S.0-Z5, with EDP N62021 / catalog number 6219987 529, manufactured in the USA. The tool features a 3/4 in (0.750 in) cutting diameter, 3/4 in straight shank, 1 in length of cut, 3 in overall length, and 5 flutes — confirmed directly from the label designation "CARB 3/4x3/4x1x3" and the "-Z5" flute count suffix in the part number. It is coated with AlTiN (Aluminum Titanium Nitride), providing enhanced hardness and heat resistance for dry or minimal-coolant machining of steels, stainless steels, cast irons, and hardened materials up to approximately 65 HRc. The S545 series is designed for high-performance side milling, slotting, and peripheral milling in CNC machining centers using standard ER or end mill collet chucks accepting a 3/4 in shank; the square (flat bottom) end geometry produces sharp 90° shoulder walls.
Product Specifications
| Brand | Seco Tools |
| MPN | S545-0.750-D1-S.0-Z5 |
| EDP Number | N62021 |
| Catalog Number | 6219987 529 |
| Series | S545 |
| Cutting Diameter | 3/4 in (0.750 in) |
| Shank Diameter | 3/4 in (0.750 in) |
| Length of Cut (LOC) | 1 in |
| Overall Length (OAL) | 3 in |
| Number of Flutes | 5 |
| End Type | Square (Flat Bottom) |
| Shank Type | Straight |
| Coating | AlTiN (Aluminum Titanium Nitride) |
| Substrate | Solid Carbide |
| Country of Origin | USA |
| Condition | New |