Hertel 18695 Countersink 1-1/2 in 90 Deg 4 Flute Hss

Product Description

The HERTEL 18695 is a 4-flute high speed steel countersink designed for producing clean, accurate countersunk holes in metal and similar materials. With a 1-1/2 inch head diameter and a 90-degree included angle, it is suited for deburring, chamfering, and seat preparation on fastener holes. The straight cylindrical shank measures 3/4 inch in diameter, providing positive grip in standard drill chucks and collet holders. High speed steel construction offers good wear resistance and durability across a range of workpiece materials. Machinists, tool and die makers, and maintenance technicians typically use this countersink in drill press, lathe, or CNC applications.

This countersink is used in general metalworking environments including fabrication shops, maintenance facilities, and production floors. The 90-degree included angle matches the standard seat geometry required by flat-head machine screws and bolts conforming to common inch-series fastener specifications. The 1-1/2 inch head diameter accommodates larger fastener hole patterns and is well suited for structural or heavy-duty assembly work where a full countersink seat is required on thicker or harder stock.

Key Features

• 1-1/2 inch head diameter for large fastener seat preparation
• 90-degree included angle matches standard flat-head fastener geometry
• 4-flute design promotes smooth cutting action and reduces chatter
• High speed steel construction for durability across a range of metals
• 3/4 inch straight cylindrical shank fits standard chucks and collet holders

Compatibility

Designed as an OEM-style replacement or direct tooling selection for metalworking operations requiring a 90-degree, 4-flute countersink with a 3/4 inch straight cylindrical shank and 1-1/2 inch head diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians using a drill press, milling machine, lathe, or compatible CNC spindle. Ensure the machine is fully powered down and the spindle is locked before inserting or removing the tool from the chuck or collet. Secure the shank firmly to the rated chuck capacity to prevent slippage during operation. Follow applicable shop safety standards and machine manufacturer guidelines for cutting speeds appropriate to the workpiece material.