End Mill Upcut Spiral
SpeTool 1/4" 3-Flute Upcut Spiral (Finishing)
SpeTool
$12.99
Overview
The 3-flute upcut spiral from SpeTool is designed for finishing passes where the smoothest possible surface is needed. More flutes mean more cuts per revolution, resulting in a finer finish. Best used after roughing with a single-flute bit. The trade-off is reduced chip clearance, so it should not be used for heavy material removal.
Best for
Ultra-smooth finishing passes in hardwoods where surface quality is paramount.
Specifications
Shank Diameter
1/4"
Cutting Diameter
1/4"
Flute Count
3
Material
Solid Carbide
Coating
Uncoated
Type
Upcut Spiral
Material Compatibility
Hardwood Plywood MDF Acrylic
Not rated for aluminum. Use a ZrN or DLC coated single-flute end mill for aluminum cutting.
Pros
- Smoothest finish of any upcut option
- 3 flutes for fine surface quality
- Great for final passes
- Reduces post-machining sanding
Cons
- Poor chip evacuation - not for roughing
- Higher feed rates required
- More expensive than 1 or 2-flute
- Can pack chips in deep cuts