Accupro 95169788 Corner Radius End Mill 1/4 in Solid Carbide

Product Description

The ACCUPRO 95169788 is a solid carbide corner radius end mill designed for precision milling of ferrous and non-ferrous materials in CNC machining centers and manual mills. It measures 0.25 inches in diameter with a 0.75-inch length of cut and a 2.5-inch overall length. The tool features a 0.090-inch corner radius, a 38-degree variable index helix, and four flutes with right-hand cutting and flute direction. An AlCrTiN coating provides thermal resistance and surface hardness, extending tool life in high-speed and high-temperature cutting applications. The micrograin carbide substrate adds toughness and edge retention under aggressive feed rates.

This end mill is suited for finish and semi-finish milling operations where corner radius geometry is required to reduce stress concentrations at part edges. It is used in aerospace, mold and die, and general precision machining environments. The centercutting design allows plunge entry into workpieces. The straight cylindrical shank at 0.25 inches (6.35 mm) fits standard ER and end mill holders. The single-end configuration is typical for tooling setups requiring consistent reach and balanced cutting forces in 3-axis and 4-axis milling operations.

Key Features

• 0.090-inch corner radius reduces edge chipping and improves surface finish at part corners
• AlCrTiN coating provides oxidation resistance and hardness for high-speed cutting
• 4-flute variable index geometry reduces harmonic vibration and chatter
• Centercutting design enables direct plunge milling without pre-drilling
• Micrograin solid carbide construction for edge retention and rigidity
• Right-hand spiral flutes for efficient chip evacuation in conventional and climb milling

Compatibility

Designed as a direct-fit replacement for 0.25-inch shank corner radius end mill applications requiring a 0.090-inch radius and 0.75-inch length of cut in standard ER collet chucks or end mill holders.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the spindle is fully stopped and the machine is in a safe state before changing tooling. Confirm holder bore size and runout tolerance match the 0.25-inch shank diameter before clamping. Follow machine tool manufacturer torque guidelines when tightening collet nuts or set screws to avoid shank damage.