High Speed Steel Shell End Mill
NIAGARA High Speed Steel Shell End Mill - Tool Material: High Speed Steel   Number of Teeth: 12   Series: R-SERIES   Tooth Pattern: Right hand helical tooth design.   SIZE : 3   HOLE DIAMETER : 1-1/4

High Speed Steel Shell End Mill

Item #: 10-909-570
Brand: KEO
Size: 3"
Length of Cut: 1-3/4"
Hole Diameter: 1-1/4"

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  • For milling operations where a larger diameter end milling cutter is preferred.
  • Designed as arbor mounted cutters for machine tools.
  • Slots cut into back end of shell body are used to engage driving lugs on the arbor, providing a positive drive and preventing any possibility of slippage during use.
  • Can be used together on a two spindle NC machine for simultaneous milling of right and left hand shapes.


  • Sized and proportioned to afford a good cutting range and ample rigidity.
  • Right hand helical tooth design.
  • Positive rake cutter geometry for efficient, general purpose metal removal.
Ships direct from factory.

Technical Data

  • Manufactured from high speed steel with bright finish.
NIAGARA R Series HSS Right Hand General Purpose Shell End Mills
Product Specifications
Brand KEO
Size 3"
Length of Cut 1-3/4"
Hole Diameter 1-1/4"
Tool Material High Speed Steel
No. of Teeth 12
Application General purpose
Cutting Direction Right Hand
Finish Coating Bright Finish
Hardness 58 to 60 RC
Manufacturing Method • Ground from solid.
Model # 09570
Prop. 65 Yes
Tooth Pattern Right hand helical tooth design.
Type High Speed Steel Shell End Mill
Weight 2 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.