Cobra Carbide
Cobra Carbide 56679 5xD High Perf Non-Coolant Drill 7/16 pneumatic accessory
A 7/16 inch, 5xD high-performance non-coolant drill bit for pneumatic drilling applications
- 5xD reach drills deeper holes in one pass
- Non-coolant design simplifies setup on pneumatic tools
- 7/16 inch diameter fits standard automotive fasteners
- Cobra Carbide construction resists wear in tough materials
- New condition ensures full factory performance
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.
Highlights
- 5xD reach drills deeper holes in one pass
- Non-coolant design simplifies setup on pneumatic tools
- 7/16 inch diameter fits standard automotive fasteners
- Cobra Carbide construction resists wear in tough materials
- New condition ensures full factory performance
Specifications
| Brand | COBRA CARBIDE |
|---|
Questions about this item
When will the 7/16" carbide tip need resharpening or replacement under normal use?
The 5xD high-performance carbide drill wears gradually; resharpen when cutting edges dull or hole quality drops, typically after many holes in steel or cast iron.
What limits continuous drilling depth with this 5xD non-coolant bit?
The 5xD design sets the maximum depth at five times the 7/16" diameter; chip evacuation and heat become the practical limits beyond that.
How much heat does the non-coolant 7/16" drill generate during all-day production runs?
Without through-coolant, heat builds in the workpiece and tool; use peck cycles and cutting fluid to manage temperature during extended operation.
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