Cleveland Golf End Mill HSS 3/8 4FL Single End Square CC

End Mill 3/8 Inch 4 Flute

This Cleveland Golf end mill is a general-purpose high-speed steel cutter with a 3/8 inch diameter and four flutes. The single-end square profile suits finishing passes in a variety of ferrous and non-ferrous materials. Machinists and maintenance shops use it for slotting, profiling and light roughing on manual or CNC mills. The bright uncoated finish keeps cost low for general workshop use.

Sustained Cutting Behaviour

High-speed steel retains toughness when heat builds during longer cuts, so the tool resists chipping better than carbide in less rigid setups. The 30-degree helix angle promotes steady chip evacuation, reducing the chance of re-cutting chips on deep slots. Without a coating, the flutes stay sharp for finishing but will wear faster in abrasive alloys or high-speed production runs. Feed rates should stay conservative to maintain surface quality over extended periods.

Installation And Common Issues

The 3/8 inch shank matches the cutting diameter, allowing direct clamping in standard collets or end-mill holders without reducing sleeves. Right-hand helix and right-hand cut follow conventional milling practice, so no spindle reversal is needed. The most frequent problem is premature flank wear when speeds exceed high-speed steel limits, especially in stainless or tool steels. Chip packing can occur in deep pockets if coolant or air blast is insufficient.