Accupro 4500137 Solid Carbide Jobber Drill 5.50 Mm Tialn

Product Description

The ACCUPRO 4500137 is a solid carbide jobber-length drill bit designed for high-performance drilling in demanding applications. It features a 5.50 mm diameter, a 140-degree split point angle, and a TiAlN (titanium aluminum nitride) coating that improves heat resistance and extends tool life at elevated cutting speeds. The overall length is 3.228 inches (82.00 mm), with a flute length of 1.732 inches (44.00 mm) and a 6 mm straight cylindrical shank. The 2-flute regular spiral design with R-thinned web promotes efficient chip evacuation. This bit is installed and used by machinists, toolroom technicians, and precision metalworking tradespeople.

The 4500137 is rated for primary use in stainless steel, a material class that demands sharp geometry, rigid substrates, and effective coating to resist work hardening and heat buildup at the cutting edge. The 140-degree point angle reduces thrust force on entry and improves centering without a separate spotting operation in many setups. Coolant-through capability supports high-pressure through-spindle coolant delivery, making this bit well suited for CNC machining centers and production drilling environments where thermal management is critical. The 5xD flute-to-diameter ratio provides adequate chip clearance for moderate-depth holes in the stainless steel range.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• TiAlN coating improves oxidation resistance and extends tool life at high cutting speeds
• 140-degree proprietary point angle reduces entry thrust and improves self-centering
• Coolant-through design supports high-pressure through-spindle coolant delivery
• R-thinned web reduces chisel-edge contact and lowers axial cutting force
• Right-hand cut, regular spiral flute for standard CNC and manual drill press setups
• Conforms to DIN specification for dimensional consistency

Compatibility

Designed as a high-performance replacement jobber drill for CNC machining centers, drill presses, and manual machines equipped with a collet or chuck accepting a 6 mm straight shank. Primary workpiece material rating is stainless steel; the solid carbide substrate and TiAlN coating also support use in other ferrous and hard alloy materials at appropriate cutting parameters.

Installation Notes

Installation and use should be performed by qualified machinists familiar with carbide tooling requirements. Secure the straight shank in a precision collet or drill chuck rated for the intended spindle speed before use. Carbide is brittle compared to high-speed steel - avoid side loading, interrupted cuts without verified setup rigidity, or dropping the tool on hard surfaces. When using through-spindle coolant, confirm coolant pressure and flow rate are within the machine and toolholder specification before starting the cut.