Osg 701-5002 Carbide Countersink 1/2 in 90 Degree 24 Flute

Product Description

The OSG 701-5002 is a solid carbide countersink designed for producing clean, accurate countersunk holes in ferrous metals and hard materials. With a 1/2 inch head diameter, a 90-degree included angle, and 24 flutes, this tool delivers smooth cutting action and fine surface finishes in a single pass. The straight cylindrical 1/4 inch shank mounts directly in standard drill chucks or collet holders. The bright, uncoated carbide construction handles demanding applications where high wear resistance is required. Machinists and toolroom professionals use this countersink for deburring, chamfering, and seat preparation across production and maintenance environments.

The 701-5002 is suited for countersinking in alloy steel, cast iron, hardened steel, and high-carbon steel. The 24-flute geometry makes it particularly effective where chatter reduction and finish quality matter, such as precision hole preparation for flat-head fasteners. It is a single-end tool with no pilot, allowing it to self-center in pre-drilled holes. Typical applications include CNC machining centers, manual mills, and drill press operations in both job shop and production settings.

Key Features

• 1/2 inch head diameter with 90-degree included angle for standard flat-head fastener seating
• 24-flute design reduces chatter and improves surface finish in hard metals
• Solid carbide construction for superior wear resistance over high-speed steel alternatives
• Bright, uncoated finish maintains sharp edge geometry without coating buildup
• 1/4 inch straight cylindrical shank fits standard collets and drill chucks
• Right-hand cut, single-end configuration for straightforward setup and use

Compatibility

Rated for use in alloy steel, cast iron, hardened steel, and high-carbon steel. Fits any machine spindle or chuck accepting a 1/4 inch straight shank.

Installation Notes

This countersink is installed by a machinist or toolroom technician in a drill chuck, collet, or tool holder accepting a 1/4 inch straight shank. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank with adequate grip length to prevent pullout under cutting loads. Verify pre-drilled hole size and alignment before countersinking to maintain seat concentricity.