Hertel H-81185010500 Combo Drill Countersink 1/8 in Hss

Product Description

The HERTEL H-81185010500 is a combination drill and countersink designed for simultaneous drilling and countersinking in a single operation. Built from high-speed steel with a bright, uncoated finish, this tool handles the center drilling and countersinking tasks common in metalworking, fabrication, and general machining environments. It carries a trade size of 1, features a 1/8 inch body diameter, a 118-degree drill point angle, and a 60-degree included angle for the countersink. At 5 inches overall length, it is classified as a long-length tool. Plain cutting edges and a double end type provide straightforward use and extended tool life between sharpenings.

This combo drill countersink is suited for use in manual or CNC machine setups where center holes and countersinks are required before fastener seating or precision turning operations. The 3/64 inch drill point diameter and 3/64 inch drill point length make it appropriate for small-diameter starting work. It is not aircraft style and does not feature an insertable cutter head or taper, keeping setup simple for standard shop and production use.

Key Features

• Combination tool performs center drilling and countersinking in one pass
• High-speed steel construction for durability across a range of workpiece materials
• Bright uncoated finish suitable for general-purpose machining applications
• 118-degree drill point angle with 60-degree included countersink angle
• Double end type extends usable tool life
• Long-length design at 5 inches overall for reach in deeper setups

Compatibility

Designed as a standard combo drill countersink for use in drill presses, lathes, and CNC machining centers that accept straight-shank center drill and countersink tooling of compatible body diameter.

Installation Notes

This tool is installed and operated by machinists, tool and die makers, or fabricators using standard collet or drill chuck setups rated for the 1/8 inch body diameter. Secure the tool firmly in the chuck before operation and verify spindle speed is appropriate for the workpiece material and tool diameter. Inspect the cutting edges for wear before each use, particularly on double-end tools where one end may see more use. Follow all shop safety practices including eye protection and proper workholding before initiating any cutting operation.