GWS 315250 3/8x3/8x1x2-1/2 3FL ZRN Carbide Ball End Mill
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The GWS Tool Group 315250 is a new, solid carbide 3-flute ball nose end mill engineered specifically for aluminum and non-ferrous machining (ALUM designation), featuring a ZrN (Zirconium Nitride) coating applied over a bright-finish substrate — visible as the characteristic gold/champagne color on the flutes. The tool measures 3/8 in cutting diameter with a 3/8 in straight shank, 1 in length of cut, and 2-1/2 in overall length; the SEEM designation confirms a square (flat) end-of-shank profile and center-cutting capability with chip-thinning geometry optimized for high-speed aluminum milling. ZrN coating provides a low coefficient of friction and excellent lubricity against aluminum, suppressing built-up edge (BUE) at elevated surface speeds while the 3-flute geometry balances chip evacuation volume with rigidity for high metal-removal-rate profiling, finishing, and 3D contouring in aluminum, brass, copper, and plastics on CNC machining centers accepting ER or shrink-fit 3/8 in bore toolholders.
Product Specifications
| Brand | GWS Tool Group |
| MPN | 315250 |
| Item # | 90581604 |
| Cutting Diameter | 3/8 in (0.375 in) |
| Shank Diameter | 3/8 in (0.375 in) |
| Length of Cut (LOC) | 1 in |
| Overall Length (OAL) | 2-1/2 in |
| Number of Flutes | 3 |
| End Geometry | Ball Nose |
| Shank Type | Straight (Cylindrical) |
| Substrate | Solid Carbide (SC) |
| Coating | ZrN (Zirconium Nitride) |
| Application | Aluminum & Non-Ferrous (ALUM) |
| Center Cutting | Yes |
| Shank End Style | Square End (SEEM) |
| Condition | New |