Value Collection SC4090100 Countersink 90 Deg 3 Flute Hss

Product Description

The VALUE COLLECTION SC4090100 is a single-end, 3-flute countersink designed for right-hand cutting in metal fabrication and machining applications. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers clean, accurate countersink profiles for fastener seating and deburring operations. The tool features a 90-degree included angle, a 1-inch head diameter, and a straight-cylindrical 0.5-inch shank diameter. At 0.33 pounds, it is a compact, durable tool suited for shop and field use by machinists, tool and die professionals, and fabricators working on light to medium-duty countersinking tasks.

This countersink is intended for use in standard drill press, milling machine, or hand-held power drill setups where a 90-degree countersink profile is required. It is well suited for preparing holes to accept flat-head fasteners in steel, aluminum, and similar metals. The straight-cylindrical shank allows straightforward chucking in most standard tool holders without additional adapters. No pilot is included, making it appropriate for applications where the operator centers the tool manually or uses a pre-drilled guide hole.

Key Features

• 90-degree included angle for standard flat-head fastener seating
• 3-flute geometry provides smooth cutting action and reduced chatter
• High-speed steel construction offers good hardness and wear resistance for metal cutting
• Bright, uncoated finish — no coating to chip or flake during use
• Straight-cylindrical 0.5-inch shank fits standard drill chucks and tool holders
• Single-end design with no pilot — operator-guided centering

Compatibility

Designed as a general-purpose countersink for use in drill presses, milling machines, and power drills accepting a 0.5-inch straight-cylindrical shank. Suitable for countersinking operations on steel, aluminum, and similar workpiece materials.

Installation Notes

Installation should be performed by a qualified machinist or fabricator familiar with rotary cutting tools. Secure the shank fully in the chuck and verify runout before cutting. Always power down and de-energize the machine before changing or adjusting tooling. Follow applicable shop safety standards and wear appropriate PPE, including eye protection, when operating countersinking tools.