3 Flute High Helix High Speed Steel Finishing Single End Mill
NIAGARA 3 Flute High Helix High Speed Steel Finishing Single End Mill - Tool Material: M7 High speed steel   Number of Flutes: 3   Overall Length : 3-1/8   Shank Diameter  : 3/8   Size : 5/16   Flute Length : 1-3/8

3 Flute High Helix High Speed Steel Finishing Single End Mill

Made In The USA
Item #: 08-800-014
Size: 5/16"
No. of Flutes: 3
Length of Cut: 1-3/8"

Master Catalog Listing

Need a different size, length or brand?

View Product Group Page
3 options for high performance milling!


  • 50% or greater increase in productivity.
  • 3 flute design offers a larger cross sectional area providing greater strength.
  • Longer tool life.
  • Improved workpiece surface finish.
  • Increased rigidity.
  • Reduced chatter and squall.
  • Improved chip evacuation and chip formation.
  • Accurate rake angle measurement.
  • Consistent rake angle after resharpening.
  • Optimal material removal rates.
  • Heavier feed rates.


  • Unique flute design and high performance geometries in one tool.
  • Super low RA surface finish (18 RA to 22 RA) on critical cutting edge surfaces reduces friction and improves chip formation.
  • The eccentric outside diameter relief helps reduce horizontal milling lines and keeps chatter and squall to a minimum.
  • New design allows for higher feed per tooth rates for greater productivity.
  • Full form ground flutes with true flute rake angle geometries make this tool cut freely with outstanding chip evacuation.
  • Eccentric ground relief.
  • Heavy duty tooth structure.
  • Advanced chip evacuation ramp.
  • CNC qualified.
NIAGARA PRODUCTION 3 Flute High Helix Finish Single End Mills
Product Specifications
Size 5/16"
No. of Flutes 3
Length of Cut 1-3/8"
Shank Diameter 3/8"
Tool Material M7 High Speed Steel
Finish Coating Bright Finish
Center Cutting Yes
Single or Double End Single
Overall Length 3-1/8"
Corner Radius 0
Cutting Direction Right Hand
Flute Length 1-3/8"
Helix Angle 37° Helix
Helix Angle & Style 37° Helix
Series [A-337]
Prop. 65 Yes
Shank Style Straight Shank
Tolerance_Cutting Diameter +0.001"/-0.000"
Tolerance_Mill Diameter +0.001"/-0.000"
Type 3 Flute High Helix High Speed Steel Finishing Single End Mill
Weight 0.625 lbs.
Prop 65 Warning Many metalworking products do contain metals that are included in the latest Prop 65 warning. Exposure to the elements can be harmful. May cause cancer and reproductive harm.

Other Items to Consider

SHAVIV Rout-A-Burr Set - Mfr Number: 3SB----I