Hertel H-81155030000 Combo Drill Countersink Hss 1/4 in

Product Description

The HERTEL H-81155030000 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Built from high-speed steel (HSS) with a bright, uncoated finish, this tool handles ferrous and non-ferrous materials in machine shop, fabrication, and general metalworking applications. The 1/4 inch body diameter houses a 7/64 inch drill point with a 118-degree drill point angle and a 90-degree included countersink angle. Overall length is 2 inches. The plain cutting edge style and double end type make this a straightforward, reliable workhorse for machinists, toolroom techs, and maintenance professionals.

This combo drill countersink suits bench drill presses, CNC machining centers, and manual lathes where consistent countersink geometry is required before fastener seating. Trade size 3 designates the drill point diameter at 7/64 inches and a drill point length of 7/64 inches. The tool is non-tapered and non-aircraft style, intended for standard production and maintenance countersinking tasks in light-to-medium duty metalworking environments. It is sold individually and is appropriate for job shops, maintenance facilities, and production floors that need a reliable single-piece countersink solution.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous materials
• Bright uncoated finish for general-purpose use without additional coating cost
• 118-degree drill point angle suits standard metalworking countersinking applications
• 90-degree included angle produces consistent countersink geometry for flathead fasteners
• Double end type extends usable tool life
• Compact 2 inch overall length fits standard drill chuck setups without overhang concerns

Compatibility

Designed as a standard OEM-style combo drill countersink for use in any drill press, lathe, or machining center accepting a 1/4 inch body diameter tool with a standard chuck or collet.

Installation Notes

Installation is performed by machinists or maintenance technicians familiar with rotary cutting tools. Secure the tool firmly in a properly sized chuck or collet before operation and verify runout is within acceptable tolerance. Power down and de-energize the machine spindle completely before inserting or removing the tool. Do not exceed the recommended RPM range for the workpiece material and tool diameter as specified by the machine manufacturer.