Sgs 74255 Carbide Countersink 1/4 in 90 Degree 6 Flute

Product Description

The SGS 74255 is a solid carbide countersink designed for precise chamfering and seat preparation in metalworking and machining applications. With a 1/4 inch head diameter, a 90-degree included angle, and 6 flutes, it delivers clean, chatter-resistant cuts in a wide range of materials. The straight cylindrical shank measures 1/4 inch in diameter, making it compatible with standard drill chucks and collet holders. The bright uncoated carbide construction provides rigidity and edge retention in production and job-shop environments. Machinists and tool-and-die professionals install this countersink for deburring, screw-seat preparation, and edge chamfering on ferrous and non-ferrous stock.

The SGS 74255 is suited for general countersinking operations on CNC machining centers, manual mills, and drill presses. Its 6-flute geometry reduces vibration and improves surface finish compared to lower-flute-count alternatives, making it appropriate for moderate-to-high feed applications in steel, aluminum, and similar materials. The right-hand cutting direction aligns with standard spindle rotation. This is a single-end tool with no pilot and a standard countersink head form, not a head-only insert style.

Key Features

• 1/4 inch head diameter with 90-degree included angle for standard fastener seat preparation
• 6-flute geometry reduces chatter and improves surface finish
• Solid carbide construction for rigidity and wear resistance
• Bright uncoated finish suits a broad range of workpiece materials
• Straight cylindrical 1/4 inch shank fits standard chucks and collets
• Right-hand cut, single-end design with no pilot

Compatibility

Designed as a direct-fit countersink for standard 1/4 inch straight-shank toolholders, drill chucks, and collet systems used in CNC and manual machining setups.

Installation Notes

Installation is performed by a machinist or toolroom technician. Secure the shank firmly in a drill chuck or collet to the full recommended grip depth before operation. Ensure the spindle is at a full stop before loading or removing the tool. Follow applicable shop safety standards and machine manufacturer guidelines for speed and feed selection when using carbide cutting tools.