SpeTool 1/4" 3-Flute Upcut Spiral (Finishing)
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