Value Collection BC11P0008 Combo Drill Countersink Size 8

Product Description

The VALUE COLLECTION BC11P0008 is a size 8 combination drill and countersink designed for precision hole preparation and countersinking in a single operation. Machined from cobalt high-speed steel with a bright uncoated finish, this tool handles harder workpiece materials where standard high-speed steel loses edge retention. The 90-degree included angle produces a standard countersink profile. The double-end design extends tool life by providing two usable cutting ends before replacement. With a plain cutting edge style and right-hand cut direction, it suits conventional drill press and hand-drill setups used by machinists, pipefitters, and HVAC fabricators working with ferrous and stainless materials.

This combo drill countersink is intended for countersinking and spot-drilling applications in metalworking, fabrication, and mechanical assembly work. The 3/4 inch body diameter provides mass for rigidity during the countersinking pass, reducing chatter. The 5/16 inch drill point diameter and 5/16 inch point length suit size 8 fastener clearance and seating requirements. It is not an aircraft-style tool and is not classified as a long-length tool, making it a straightforward bench or floor-drill application for trade and production shop environments.

Key Features

• Cobalt high-speed steel construction for improved heat and wear resistance versus standard HSS
• Double-end design provides two cutting ends, extending service life before replacement
• 90-degree included angle matches standard countersink fastener head geometry
• Right-hand cut with plain cutting edge style for use in conventional drill setups
• Bright uncoated finish with no coating buildup to interfere with dimensional accuracy
• 3/4 inch body diameter provides rigidity to reduce chatter during countersinking

Compatibility

Designed as an OEM-style replacement or direct-use combo drill countersink for size 8 fastener applications in standard drill press, CNC, or hand-drill setups requiring a 90-degree countersink profile.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist or tradesperson familiar with cutting tool safety. Always power down and de-energize the drill press or machine spindle before mounting or changing tooling. Secure the workpiece properly to prevent movement during drilling and countersinking operations. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection when working with cobalt tooling on ferrous or stainless materials.