Accupro 4500323 Screw Machine Drill Bit 6.50mm Carbide

Product Description

The ACCUPRO 4500323 is a screw machine length drill bit engineered for high-performance drilling in demanding shop and machining environments. Built from solid carbide and coated with TiAlN (titanium aluminum nitride), this bit handles elevated cutting temperatures and abrasive materials without rapid wear. The 140-degree split point with R-thinning reduces entry thrust and helps prevent walking on hard surfaces. At 6.50 mm in diameter with a 79 mm overall length, it fits standard straight-cylindrical tool holders and is sized for short, rigid setups where tool deflection must be minimized. Machinists and tool-and-die professionals are the primary users.

This drill bit is rated for stainless steels as the primary workpiece material, making it appropriate for aerospace, food service equipment, medical fabrication, and general precision machining applications where work hardening is a concern. The 3xD flute-to-diameter ratio and regular spiral flute geometry support chip evacuation in deep hole drilling scenarios. Coolant-through capability allows internal coolant delivery directly to the cutting edge, which is especially useful on CNC machining centers running stainless or other tough alloys.

Key Features

• Solid carbide construction with TiAlN coating for extended tool life in stainless and hard alloys
• 140-degree special point angle with R-thinning reduces thrust and improves hole entry accuracy
• Coolant-through design supports internal coolant delivery on compatible machine tool spindles
• Straight-cylindrical shank at 8.00 mm diameter fits standard collet and drill chuck tooling
• Regular spiral flute geometry with 34 mm flute length promotes efficient chip removal
• Conforms to DIN specification designation for dimensional standardization

Compatibility

Designed as a high-performance screw machine length drill bit for use in CNC machining centers, drill presses, and manual mills equipped with straight-cylindrical collet or chuck tooling accepting an 8.00 mm shank diameter. Primary workpiece material rating is stainless steels per manufacturer specification.

Installation Notes

Installation and tool changes must be performed with the machine spindle fully stopped and locked out per applicable machine safety procedures. Secure the straight-cylindrical shank firmly in a properly sized collet or drill chuck to the tool holder manufacturer's specified clamping torque range. When using the coolant-through feature, verify that the machine tool spindle and toolholder are compatible with internal coolant delivery before use. Proper speeds and feeds for the workpiece material should be confirmed against the manufacturer's cutting data recommendations before operation.