Cobra Carbide 56679 5xD High Perf Non-Coolant Drill 7/16 pneumatic accessory

7/16 inch 5xD Non-Coolant Drill

The Cobra Carbide 56679 is a 5xD high-performance drill bit sized at 7/16 inch for pneumatic and power-tool applications. It targets machinists and maintenance technicians who need accurate holes without a through-coolant supply. The solid-carbide construction supports demanding metal-cutting tasks in workshop and production environments.

Non-Coolant Design Impact

Operating without internal coolant channels means the flute geometry must evacuate chips efficiently while the external flood or mist system manages heat. This changes the operator's workflow by requiring consistent external lubrication and chip monitoring to maintain tool life and hole quality. The absence of coolant holes simplifies resharpening and reduces the risk of internal blockage during deep-hole drilling.

Solid Carbide Build and Shank Fit

The solid carbide body provides high rigidity and wear resistance for the 5xD depth-to-diameter ratio, reducing deflection in tough alloys. A standard cylindrical shank fits common drill chucks and collet holders, allowing quick changes on milling machines, lathes or portable magnetic drills. California Proposition 65 warnings apply due to substances identified by the state as carcinogenic and reproductive hazards.