4 Flute Short Carbide End Mill Custom Length Flat Bottom CNC Milling Cutter For Steel Aluminum 3/8" 1/4" 6mm 8mm Shank

Our precision-engineered 4-flute short carbide end mill is specifically designed for high-performance machining in confined spaces and deep pocket applications. Featuring a robust solid tungsten carbide construction (YG8 grade) with optional TiAlN coating, this flat bottom milling cutter delivers exceptional rigidity and wear resistance in steel (up to HRC55), aluminum alloys, and other engineering materials. The short flute length design significantly improves tool stability while maintaining optimal chip evacuation.

• Premium submicron grain tungsten carbide (0.5μm)
• Customizable flute lengths (standard: 3×D)
• Precision ground flat bottom (±0.005mm)
• 35° helix angle for smooth chip flow
• Available in 1/4", 3/8", 6mm, and 8mm shank diameters
• TiAlN coating option for steel applications
• Mirror polished flutes for aluminum (Ra 0.1μm)

• 50% more rigid than standard length end mills
• Reduced vibration in deep pocket machining
• Excellent surface finish (Ra 0.8μm achievable)
• Custom lengths available (MOQ: 10 pieces)
• Balanced geometry prevents deflection

• Deep cavity mold manufacturing
• Aerospace structural component pocketing
• Automotive die maintenance
• Aluminum heat sink machining
• Medical device component milling
• Precision engineering small feature work