Hertel S-74148289 Combo Drill Countersink 1/8 in Hss

Product Description

The HERTEL S-74148289 is a combination drill and countersink designed for producing a pilot hole and a countersunk seat in a single operation. Made from high-speed steel with a bright, uncoated finish, this tool is suited for use in hand-held or bench-mounted drilling applications across metal fabrication, assembly, and general machining work. The body measures 1/8 inch in diameter with a 3/64 inch drill point diameter and an overall length of 1-1/4 inches. The 60-degree included angle is the standard geometry for most fastener seating applications. This is a right-hand cut tool with a plain cutting edge style and a double end type.

This combo drill countersink is intended for countersinking operations on metal workpieces where consistent fastener flush-seating is required. It is sized for trade size number 1 applications, making it a practical fit for light-duty production environments, maintenance and repair work, and sheet metal assembly. Machinists, tool and die workers, and general fabricators are the typical users. The uncoated high-speed steel construction is appropriate for use on softer metals and general-purpose materials at moderate speeds.

Key Features

• Combination drill and countersink completes pilot hole and seat in one pass
• High-speed steel construction provides adequate hardness for general metal cutting
• 60-degree included angle matches standard flat-head fastener geometry
• Right-hand cut with plain cutting edge for use in standard drill chucks
• Double end type extends tool life by providing two usable cutting ends
• Bright uncoated finish - no coating buildup to affect dimensional accuracy

Compatibility

Designed as a standard trade size number 1 combo drill countersink for use in conventional drill chucks and drill press setups suited to light-duty countersinking operations on metal and similar workpiece materials.

Installation Notes

This tool is installed in a standard drill chuck; ensure the chuck is fully tightened and the workpiece is securely clamped before operation. Use appropriate cutting fluid or lubricant when working with ferrous metals to reduce heat buildup and extend tool life. Verify spindle direction is set to right-hand rotation before engaging the tool. Inspect both cutting ends for wear or chipping before each use.