Cleveland C42306 4-Flute HSS Left-Hand Helix Square End Mill

Cleveland C42306 End Mill

This Cleveland C42306 is a four-flute high-speed steel square end mill with a left-hand helix and cut. It measures 0.5 inch milling diameter with a 1.25 inch length of cut and 3 1/4 inch overall length. The uncoated tool features a Weldon flat shank of 1/2 inch diameter for secure holding in standard toolholders. It is suited for general milling operations requiring left-hand rotation.

Machinists needing left-hand helix

This end mill serves machinists who require a left-hand helix and cut direction for specific milling applications. The high-speed steel construction suits general-purpose machining of ferrous and non-ferrous materials. Buyers who need coated tools for extended wear resistance or higher cutting speeds should look at something else. Users requiring coolant-through capability or a different shank style will also need an alternative.

Four-flute left-hand helix

The defining specification is the four-flute left-hand helix geometry combined with a left-hand cut direction. This configuration determines chip evacuation direction and cutting forces for the intended application. The 0.5 inch diameter and 1.25 inch length of cut define the cutting envelope. Verify that your machine spindle and toolholder support left-hand rotation before purchasing.