Keo 917-000-045 Countersink 3/4 in 82 Degree 3 Flute Hss

Product Description

The KEO 917-000-045 is a single-end, straight-shank countersink designed for accurate seat preparation in metal fabrication, machining, and maintenance applications. Built from high-speed steel (HSS), it delivers reliable cutting performance across a range of workpiece materials. The tool features a 3/4 inch head diameter and an 82-degree included angle, making it well suited for standard flat-head fastener seating. With three flutes and a right-hand cutting direction, it produces a clean, consistent countersunk profile in a single pass. The 1/2 inch straight-cylindrical shank mounts directly in standard drill chucks and collet holders.

This countersink is used in general machining, sheet metal work, and structural fabrication where flat-head screws or bolts require a properly angled seat. The 82-degree included angle matches the seating geometry of common imperial flat-head fasteners. It is appropriate for use in manual drill presses, CNC machining centers, and hand drilling operations where a straight-shank tool is specified. Machinists, tool and die technicians, and maintenance mechanics are the typical end users for this type of tooling.

Key Features

• 3/4 inch head diameter for standard flat-head fastener countersinking
• 82-degree included angle matches common imperial flat-head screw geometry
• Three flutes for smooth, chatter-resistant cutting action
• High-speed steel construction for durability across a range of materials
• Right-hand cut with straight-cylindrical 1/2 inch shank for broad machine compatibility
• No pilot required - single-end design for straightforward setup

Compatibility

Designed as an OEM-style replacement or direct-use countersink for drill presses, CNC machining centers, and hand drilling equipment accepting a 1/2 inch straight-cylindrical shank.

Installation Notes

A machinist or tooling technician should secure the shank firmly in a properly sized drill chuck or collet before use. Ensure the workpiece is clamped securely to prevent movement during the countersinking operation. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Power down the machine and confirm the spindle has fully stopped before removing or inspecting the tool.