Accupro 4500190 Jobber Drill Bit Letter F Solid Carbide

Product Description

The ACCUPRO 4500190 is a solid carbide jobber-length drill bit sized to Letter F (0.2570 inches) with a 140-degree split point and a TiAlN (Titanium Aluminum Nitride) coating. It is designed for high-performance drilling in demanding materials, primarily stainless steel, where tool life and hole quality are critical. The bit features a regular spiral flute, right-hand cutting direction, and a web-thinned point that reduces thrust and improves center-starting accuracy. At 4.2969 inches overall length with a 2.2031-inch flute length, it fits standard jobber-length drilling setups. Machinists, tool-and-die tradespeople, and maintenance technicians working with stainless steel or other hard metals are the primary users of this bit.

This drill bit is suited for applications where consistent hole diameter and edge quality matter in corrosion-resistant alloys and hard metals. The coolant-through design supports through-spindle coolant delivery, making it a practical choice for CNC machining centers and drill presses equipped with coolant systems. The 5xD flute-to-diameter ratio provides adequate chip clearance for deeper holes in tough workpiece materials. A straight cylindrical shank with a 17/64-inch (0.2656-inch decimal) diameter fits standard drill chucks and collet systems without modification.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive materials
• TiAlN coating improves heat resistance and extends tool life in stainless steel and high-alloy applications
• 140-degree split point with R-thinned web reduces entry thrust and improves positional accuracy
• Coolant-through design supports through-spindle coolant delivery for heat management in deep-hole drilling
• Regular spiral flute with 5xD ratio promotes efficient chip evacuation
• Right-hand cutting, straight cylindrical shank for compatibility with standard chucks and collets

Compatibility

Designed as an OEM-style replacement or direct-fit drill bit for CNC machining centers, drill presses, and handheld drilling equipment accepting a straight cylindrical shank of 0.2656 inches in diameter.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance tradespeople familiar with cutting tool safety. Ensure the machine spindle is fully stopped and power is locked out before changing bits. Secure the straight shank firmly in the chuck or collet to the manufacturer-specified holding depth to prevent slippage under load. When using coolant-through capability, confirm the spindle coolant circuit is compatible with through-tool delivery before operation.