Hertel H-81155L04560 Combo Drill Countersink 3/8 in Hss

Product Description

The HERTEL H-81155L04560 is a combination drill and countersink designed for drilling and countersinking in a single pass. Built from high-speed steel with a bright, uncoated finish, this tool features a 3/8 inch body diameter, a 9/64 inch drill point diameter, and a 118-degree drill point angle. The 90-degree included angle produces clean, properly dimensioned countersinks for flat-head fastener seating. At 6 inches overall length, it falls into the long-length category, making it suitable for reaching recessed or deeper workpiece surfaces. Machinists and tool-and-die tradespeople use this type of combination tool to reduce setup time and improve hole-to-countersink alignment consistency.

This combo drill countersink is suited for metalworking applications where a countersunk hole is required for flat-head screws, rivets, or similar fasteners. The plain cutting edge style and non-tapered, non-aircraft-style construction make it appropriate for general-purpose machining on ferrous and non-ferrous materials in production, maintenance, and repair environments. The double end type allows for potential reuse of both ends, extending tool life. Trade size 4-1/2 designates the screw size this countersink is matched to seat correctly.

Key Features

• High-speed steel construction for durability across ferrous and non-ferrous materials
• Bright uncoated finish for general-purpose metalworking use
• 118-degree drill point angle with 90-degree included countersink angle
• Long-length design at 6 inches OAL for extended reach applications
• Double-end configuration extends usable tool life
• Single-pass drilling and countersinking reduces setup steps and improves alignment

Compatibility

Designed as a general-purpose combo drill countersink for trade size 4-1/2 flat-head fastener applications in standard metalworking and machining setups.

Installation Notes

Installation is performed by machinists or qualified tooling technicians on lathes, drill presses, or CNC equipment. Ensure the spindle and workholding are properly secured before operation. Follow standard machine guarding and PPE practices per shop safety requirements. Do not exceed the rated speed range for high-speed steel tooling in the material being cut.