Product Overview
Between the common fraction sizes sits the 140-3906, a 25/64" diameter 4-flute square end mill that fills a gap a lot of shops don't realize they have. It belongs to the 140 Series and covers the same general-purpose ground: slots, profiles, plunge cuts, and side wall work.
Precision CNC grinding keeps the geometry consistent from tool to tool, and the 30° helix does the same job it does across the rest of the 140 line, moving chips out steadily so the edge doesn't overheat. Uncoated and single-end, this cutter works across mild steel, stainless, cast iron, titanium, non-ferrous metals, plastics, and composites without needing any special handling.
Tool Specifications:
- Diameter: 25/64"
- Shank: 7/16"
- Length of Cut (LOC): 1"
- Overall Length (OAL): 2-3/4"
- Flutes: 4 Flute
- End Style: Square End
- Material: Solid Carbide
- Coating: Uncoated
- Radius: No
- Series: 140 Series
- Part No: 140-3906
Key Performance Features:
- 4-flute square end suited to roughing and finishing
- 25/64" diameter fills a practical mid-size gap
- 30° helix supports steady, controlled chip movement
- Handles slotting, profiling, plunging, and side wall work
- Single-end solid carbide construction
- Cuts mild steel, stainless, cast iron, titanium, non-ferrous, plastics, and composites
