M42 Cobalt Roughing Shell End Mill
NIAGARA M42 Cobalt Roughing Shell End Mill - HOLE DIAMETER : 1-1/4   Number of Teeth: 10   SIZE : 3-1/2   FACE WIDTH : 1-7/8

M42 Cobalt Roughing Shell End Mill

Made In The USA
Item #: 10-975-977
Brand: KEO
Size: 3-1/2"
Length of Cut: 1-7/8"
Hole Diameter: 1-1/4"

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  • For general purpose roughing operations for applications where larger diameter end milling cutter is preferred.
  • Designed as arbor mounted cutters for machine tools.
  • Well suited for a variety of ferrous and non-ferrous materials.


  • Right hand knuckle tooth design removes material more efficiently, produces finer roughing finishes and holds closer tolerances than other similar cutters.
  • Slots cut into back end of shell body are used to engage driving lugs on the arbor, providing a positive drive and prevents any possibility of slippage during use.

Technical Data

  • Manufactured from M42 cobalt steel.
  • Ground from solid.
  • Bright finish.
NIAGARA RM-750 Series M42 Cobalt Heavy Duty Right Hand Round Tooth Roughing Shell End Mills
Product Specifications
Brand KEO
Size 3-1/2"
Length of Cut 1-7/8"
Hole Diameter 1-1/4"
Tool Material M42 8% Cobalt
No. of Teeth 10
Cutting Direction Right Hand
Finish Coating Bright Finish
Model # 75977
Operation Heavy duty
Prop. 65 Yes
Series RM-750
Tooth Pattern Round Tooth
Type M42 Cobalt Roughing Shell End Mill
Weight 2.19 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.