Cleveland C46191 Countersink 1.5in 90 Degree 3 Flute Hss

Product Description

The CLEVELAND C46191 is a single-end, straight-shank countersink designed for creating accurately angled seat profiles in metal workpieces. Built from high speed steel (HSS) with an oxide coating, it delivers reliable performance across production and maintenance machining operations. The tool features a 1.5-inch head diameter, a 90-degree included angle (45-degree centerline angle), and 3 flutes for efficient chip evacuation. The 0.75-inch straight-cylindrical shank provides secure clamping in standard drill chucks or collet holders. This countersink is suited for machinists, tool-and-die technicians, and maintenance professionals working in shop and industrial environments.

The C46191 is intended for countersinking operations in carbon steel and cast iron. With a 2.875-inch overall length and a robust 1.5-inch cutting head, it is well suited for production drilling setups, manual knee mills, drill presses, and CNC machining centers where consistent 90-degree countersink geometry is required. The oxide finish provides a degree of surface hardness and lubricity that assists in chip flow during cutting. This tool does not include a pilot and is sold as a single-end unit.

Key Features

• 1.5-inch head diameter with 90-degree included angle for standard fastener seat preparation
• 3-flute geometry promotes smooth cutting and chip evacuation
• High speed steel construction rated for carbon steel and cast iron applications
• Oxide coating provides surface lubricity and corrosion resistance
• 0.75-inch straight-cylindrical shank fits standard chucks and collet holders
• Single-end design with no pilot — compatible with pre-drilled or through-hole setups

Compatibility

Designed for use in carbon steel and cast iron machining applications. Suitable for use in drill presses, knee mills, and CNC machining centers equipped with a chuck or collet holder accepting a 0.75-inch straight shank.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is in a safe, powered-down state before inserting or removing the tool from the chuck or collet. Secure the shank firmly to the manufacturer-specified runout tolerance for the holder being used. Always wear appropriate eye protection and follow shop safety procedures when operating cutting tools.