Accupro 4500177 Jobber Drill 5/16 Inch Solid Carbide Tialn

Product Description

The ACCUPRO 4500177 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding materials. Built to a 5/16 inch (0.3125 inch) diameter with a 140-degree split point, this bit delivers fast penetration and accurate hole entry with minimal walking. The TiAlN coating extends tool life in high-heat applications by reducing friction and improving wear resistance. Coolant-through capability supports continuous chip evacuation in deep-hole drilling scenarios. With a regular spiral flute, right-hand cut, and R-thinned web, the 4500177 is suited for machinists and toolroom professionals running stainless steel and other hard metals on CNC or manual equipment.

This drill is intended for precision metalworking applications where tool longevity and hole quality are critical. Its primary target workpiece material is stainless steel, though the TiAlN coating and solid carbide substrate make it suitable across a range of ferrous and non-ferrous hard materials. The 5xD flute-to-diameter ratio and 2-23/64 inch flute length support chip clearance in moderate-depth holes. The straight cylindrical shank fits standard drill chucks and collet holders without modification. It is sized for production floor, maintenance, and fabrication environments where consistent, repeatable results are required.

Key Features

• Solid carbide construction provides rigidity and wear resistance in hard and abrasive workpiece materials
• TiAlN coating reduces heat buildup and extends tool life in high-speed or dry cutting conditions
• 140-degree proprietary point angle minimizes thrust force and improves hole entry accuracy
• R-thinned web reduces chisel edge engagement and lowers required feed force
• Coolant-through design supports chip flushing in deeper drilling operations
• Right-hand cut, regular spiral flute geometry balances chip evacuation with cutting stability

Compatibility

Designed as a jobber-length drill for use in standard drill chucks and collet tool holders accepting a 5/16 inch straight cylindrical shank; primary workpiece material is stainless steel per manufacturer specification.

Installation Notes

Installation and use of carbide drill bits should be performed by qualified machinists familiar with proper speeds, feeds, and workholding practices for solid carbide tooling. Secure the workpiece firmly before drilling and confirm the spindle and chuck are in good working condition with no runout. Do not use this bit in hammer or impact-style drill drivers. When using coolant-through capability, verify that the machine spindle and toolholder support internal coolant delivery before pressurizing.