Value Collection SC1090020 Countersink 90 Degree Hss

Product Description

The VALUE COLLECTION SC1090020 is a single-flute, high-speed steel countersink designed to produce clean, chamfered seat profiles in metal and other machinable materials. With a 90-degree included angle and a 45-degree centerline angle, it cuts right-hand in standard drill press and hand-drill setups. The 1/4-inch straight-cylindrical shank fits common drill chucks and quick-change holders. The bright uncoated finish suits general-purpose countersinking where coating is not required. Machinists, tool-and-die technicians, and maintenance professionals reach for this type of tool when preparing holes to accept flat-head fasteners or to deburr drilled openings.

This countersink is suited to light-duty production and maintenance applications in machine shops, fabrication environments, and field repair settings. It is intended for countersinking operations in ferrous and non-ferrous metals, plastics, and composites at moderate speeds. The single-flute geometry provides smooth entry and reduces chatter in handheld and fixture-assisted setups. No pilot is included, so it is used freehand or guided by an existing hole.

Key Features

• 90-degree included angle for standard flat-head fastener seating
• Single-flute design reduces chatter and provides clean entry
• High-speed steel construction handles moderate-speed metal cutting
• 1/4-inch straight-cylindrical shank fits common drill chucks and quick-change holders
• Bright uncoated finish for general-purpose countersinking
• Right-hand cutting direction compatible with standard drill rotation

Compatibility

Designed as a general-purpose countersink for use with standard drill presses, hand drills, and milling machines equipped with a 1/4-inch chuck or collet. No specific OEM model compatibility is stated by the manufacturer.

Installation Notes

A licensed machinist or experienced technician should secure the shank fully in the chuck before operation. Power down or de-energize the drilling equipment completely before installing or removing the countersink. Run at appropriate surface speeds for the workpiece material — excessive speed or feed pressure can cause premature wear on high-speed steel tooling. Secure the workpiece firmly to prevent rotation during cutting.