Cleveland
Cleveland C42306 4-Flute HSS Left-Hand Helix Square End Mill
A 4-flute high-speed steel left-hand helix square end mill with 0.5 inch milling diameter, 1.25 inch length of cut, and Weldon flat shank
- TypeCutting Tools
- 4-flute left-hand helix clears chips efficiently in tough materials
- 5 in diameter suits standard milling operations
- High-speed steel construction resists wear during extended cuts
- 25 in length of cut enables deeper passes per engagement
- Weldon flat shank locks securely in standard tool holders
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.
Highlights
- 4-flute left-hand helix clears chips efficiently in tough materials
- 5 in diameter suits standard milling operations
- High-speed steel construction resists wear during extended cuts
- 25 in length of cut enables deeper passes per engagement
- Weldon flat shank locks securely in standard tool holders
Specifications
| Brand | CLEVELAND |
|---|---|
| Type | Cutting Tools |
Questions about this item
What shank diameter does the 0.5 in milling diameter end mill require?
The shank diameter is 1/2 in, matching the 0.5 in milling diameter for direct fit in standard Weldon flat holders.
How do you secure the Weldon flat on this end mill, and what step is often missed?
Tighten the set screw directly on the flat; the step often missed is aligning the flat with the screw before locking, which prevents slippage.
When should this uncoated high-speed steel end mill be replaced?
Replace when cutting edges show visible wear, chipping, or when surface finish degrades on the workpiece.
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