Hertel 84578624 Jobber Drill Bit Letter K Hss Tin

Product Description

The HERTEL 84578624 is a jobber-length drill bit sized at Letter K (0.2810 inches decimal equivalent), designed for general-purpose drilling in a wide range of materials. Built from high speed steel (HSS) with a titanium nitride (TiN) coating, this bit delivers improved surface hardness and extended tool life compared to uncoated HSS. The 118-degree standard point angle suits most common drilling applications. With an overall length of 4.25 inches and a flute length of 2.9375 inches, the 84578624 fits standard drill chucks and CNC setups. The two-flute spiral design and web-thinned, tapered web configuration promote chip evacuation and reduce entry thrust. This bit is installed by machinists, maintenance technicians, and trade professionals across fabrication, HVAC, plumbing, and electrical work.

The HERTEL 84578624 is suited for general-purpose drilling in metal, plastic, and wood in both shop and field environments. The straight cylindrical shank with a 0.2810-inch diameter fits standard drill chucks without modification. The right-hand cut spiral flute works with conventional drill press, hand drill, and CNC spindle setups. It covers the 0.2500 to 0.3000 inch drill bit size range, making it a practical choice when a Letter K hole is required for tapping, reaming prep, or clearance drilling in residential and light commercial trade work.

Key Features

• Letter K size at 0.2810 inches decimal equivalent for precise hole sizing
• High speed steel construction with TiN coating for increased surface hardness and wear resistance
• 118-degree standard point angle with web-thinned, tapered web for reduced entry thrust
• Two-flute regular spiral design promotes efficient chip evacuation
• Straight cylindrical shank fits standard chucks without modification
• Right-hand cut for use with conventional and CNC drilling equipment

Compatibility

Designed as a general-purpose jobber-length drill bit compatible with standard drill chucks accepting a 0.2810-inch straight cylindrical shank, including drill presses, hand drills, and CNC machining centers.

Installation Notes

Secure the shank fully in the chuck and verify chuck key is removed before starting the spindle. Power down the drill or de-energize the CNC before bit changes. Use appropriate cutting fluid or coolant when drilling ferrous metals to preserve coating life; note that this bit does not support coolant-through delivery. Wear appropriate eye protection and secure workpieces per shop safety standards.