M.a. Ford 40431250 Solid Carbide Spotting Drill 5/16 in

Product Description

The M.A. FORD 40431250 is a solid carbide spotting drill designed to accurately locate and start holes before a twist or jobber drill follows through. Built to a 90-degree point angle, it produces a clean, precise cone seat that guides subsequent drilling operations and reduces walkout on flat or angled workpiece surfaces. The 5/16 inch cutting diameter and 2.5 inch overall length suit a wide range of part sizes and machine setups. With two spiral flutes and a 21-degree helix angle, the tool evacuates chips efficiently during the spotting pass. The bright, uncoated finish makes the carbide substrate visible for inspection and suits general-purpose applications where coating is not required.

This spotting drill is used in machine shops and production environments running CNC machining centers, drill presses, or manual knee mills. It is suited for general-purpose spotting on ferrous and non-ferrous materials where a 90-degree countersink seat is required before through-hole or tapped-hole drilling. The straight cylindrical shank fits standard ER collet chucks and drill chucks without adapters, making tool changes fast on typical spindle setups.

Key Features

• 90-degree point angle creates an accurate locating cone for standard twist drills
• Solid carbide construction provides rigidity and wear resistance over high-cycle use
• Two spiral flutes with 21-degree helix angle for efficient chip evacuation
• Bright, uncoated finish suitable for general-purpose spotting across common workpiece materials
• Straight cylindrical shank compatible with standard collet and drill chuck toolholding
• Single-ended design, Series 404

Compatibility

Designed as a general-purpose spotting drill for use in any machine spindle accepting a 5/16 inch straight cylindrical shank. No specific model or system compatibility was stated in the product data.

Installation Notes

Installation is performed by machining professionals in shop environments. Secure the shank fully in the collet or drill chuck to the manufacturer-recommended engagement depth before running the spindle. Set spindle speed and feed rate per the material and tool diameter being spotted. Inspect the cutting edges for chipping before each use, as carbide is brittle and can micro-chip if dropped or mishandled.