Accupro 4500371 Drill Bit 35/64 in 140 Deg Solid Carbide

Product Description

The ACCUPRO 4500371 is a screw machine length drill bit engineered for high-performance drilling in demanding applications. It is manufactured from solid carbide and coated with TiAlN (titanium aluminum nitride) for extended tool life and heat resistance at elevated cutting speeds. The bit measures 35/64 inches (0.5469 inches) in diameter with a 140-degree web-thinned point that reduces entry force and improves centering on hard materials. Overall length is 5.276 inches with a 2.756-inch flute length. The straight cylindrical shank and right-hand spiral flute design make it compatible with standard drill chucks and CNC toolholders. This bit is suited for machine shops, fabrication facilities, and production environments.

The 4500371 is rated for use on stainless steels as its primary workpiece material, making it a go-to choice when drilling 300- and 400-series stainless in production or maintenance settings. The screw machine length (stub) body provides added rigidity compared to jobber-length bits, which reduces deflection and chatter during deep or interrupted cuts. The 3xD flute-to-diameter ratio supports efficient chip evacuation in short-to-medium-depth holes. Coolant-through capability allows internal coolant delivery directly to the cutting zone, extending tool life and improving chip flushing in CNC machining center applications.

Key Features

• Solid carbide construction for high rigidity and wear resistance in hard materials
• TiAlN coating improves heat resistance and extends tool life at high cutting speeds
• 140-degree R-thinned web point reduces thrust force and improves self-centering
• Coolant-through design delivers cutting fluid directly to the cutting edge
• Screw machine (stub) length body minimizes deflection for improved hole accuracy
• Right-hand 2-flute regular spiral geometry for efficient chip removal

Compatibility

Designed for use in CNC machining centers and drilling machines equipped with standard straight-shank toolholders; primary rated workpiece material is stainless steel per series ASSC140-TA-CL specifications.

Installation Notes

This bit is intended for use by machinists and CNC operators in a machine tool environment. Secure the straight shank firmly in a drill chuck or collet toolholder before operation and verify runout before beginning a cut. Always engage coolant-through flow before contact with the workpiece when using the internal coolant feature. Do not use this bit in hand-held drills; it is designed for rigid machine setups only.