Accupro 4500097 Jobber Drill 39/64 in Solid Carbide Tialn

Product Description

The ACCUPRO 4500097 is a solid carbide jobber-length drill bit designed for precision hole-making in hard and abrasive materials. It carries a TiAlN (titanium aluminum nitride) coating that reduces heat buildup and extends tool life during high-speed drilling operations. The 140-degree split point geometry initiates cuts without a center punch and minimizes walking on entry. With an overall length of 5.25 inches and a slow spiral flute design, the bit is well-suited for machining applications where chip evacuation and cutting stability are critical priorities. It is installed and used by machinists, tool-and-die professionals, and CNC operators working in production and job-shop environments.

This drill bit is sized at 39/64 inch (0.6094 inch decimal) with a straight cylindrical shank diameter of 0.625 inch. It is intended for use in drill chucks, CNC machining centers, and manual milling machines capable of accepting a straight shank at that diameter. The slow spiral flute configuration makes it particularly effective in harder workpiece materials where a standard helix angle would generate excessive heat or chatter. The UR-thinned web reduces thrust force at the point, improving feed efficiency in production drilling cycles.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• TiAlN coating extends tool life by reducing thermal load at the cutting edge
• 140-degree proprietary point type with UR web thinning for self-starting entry
• Slow spiral flute geometry optimized for drilling harder workpiece materials
• Straight cylindrical shank at 0.625 inch fits standard drill chucks and collets
• Right-hand cutting direction with 2 flutes and a flute-to-diameter ratio of 4xD

Compatibility

Designed as a jobber-length replacement drill bit for use in any drill chuck or collet system accepting a 0.625-inch straight shank, including CNC machining centers, knee mills, and benchtop drill presses configured for solid carbide tooling.

Installation Notes

Solid carbide drill bits require rigid machine setups with minimal runout; avoid use in handheld or flex-shaft tools where lateral loading can cause chipping or breakage. Confirm chuck or collet concentricity before seating the shank, and torque the chuck to the machine manufacturer specification. Coolant-through is not supported on this bit, so direct external coolant or cutting fluid to the entry point when drilling deep holes to manage chip evacuation and heat. Follow applicable shop safety procedures and machine guarding requirements when operating at elevated spindle speeds.