Keo 906-000-146 Combo Drill Countersink Size 6

Product Description

The KEO 906-000-146 is a combination drill and countersink designed to drill and chamfer a pilot hole in a single pass. Built from high-speed steel with a bright, uncoated finish, it handles both operations without a tool change. The body diameter is 0.5 inches, the drill point diameter is 7/32 inches, and the overall length is 3 inches. The 82-degree included angle produces a standard countersink profile suited to flat-head fastener seating. The double-end design extends tool life by providing a second cutting end when the first dulls.

This combo drill countersink is used in metalworking and light fabrication where pre-drilling and countersinking in one step reduces cycle time. Trade size 6 suits applications requiring a 7/32-inch pilot point. Right-hand cutting direction makes it compatible with standard drill press and hand-drill setups. It is appropriate for use in sheet metal, aluminum, and mild steel in production, maintenance, and repair environments.

Key Features

• Combination drill and countersink removes the need for a separate countersink step
• Double-end design provides two usable cutting ends for extended tool life
• High-speed steel construction handles steel, aluminum, and non-ferrous metals
• 82-degree included angle matches standard flat-head fastener countersink geometry
• 118-degree drill point angle for positive engagement and clean pilot holes
• Bright, uncoated finish for easy wear inspection

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for standard drill press and handheld drill applications requiring a size 6 combination drill countersink with a 7/32-inch point diameter.

Installation Notes

A licensed machinist or experienced fabricator should secure the workpiece firmly before drilling to prevent movement during the operation. Ensure the drill chuck is rated for the tool shank size and that the spindle speed is appropriate for the workpiece material. Power down the drill press or disconnect the handheld drill before changing or inspecting the tool. Use cutting fluid on harder materials to reduce heat buildup and extend tool life.