Cat-4 1/4" Compression End Mill

1/4" Compression End Mill

Tungsten Carbide with Nano Blue Coating

Overview
This 1/4" compression end mill is designed to deliver clean, chip-free edges on both the top and bottom surfaces of sheet goods when used with CNC spindle motors. The compression geometry combines up-cut and down-cut flutes, pulling fibers inward to eliminate tear-out on laminated materials.

Manufactured from solid tungsten carbide and finished with a Nano Blue coating, this bit is optimized for high-speed spindle use where consistent RPM and rigidity matter.

Why Use This Bit

• Clean top and bottom edges in a single operation

• Excellent performance with CNC spindles and VFD-controlled systems

• Nano Blue coating reduces heat and friction

• Longer tool life compared to uncoated bits

• Stable cutting with reduced chatter at higher RPMs

Spindle RPM & Feed Guidance
These are conservative starting points for spindle-driven CNC machines:

• RPM: 16,000 – 18,000

• Feed Rate: 120 – 180 IPM

• Plunge Rate: 40 – 60 IPM

For best results, run passes deep enough to fully engage the compression zone. Shallow passes will behave like a standard up-cut or down-cut and will not provide clean edges on both faces.

Best Applications

• Plywood

• MDF

• Laminated sheet goods

• Veneered panels

Specifications

• Flutes: 2

• Cutting Diameter: 1/4"

• Cutting Length: 1.5"

• Shank Diameter: 1/4"

• Overall Length: 2.75"

Notes

• Compression bits perform best at full or near-full material thickness

• Proper dust collection improves cut quality and tool life

• Always verify feeds and speeds for your machine rigidity and material