Hertel 91049452 Jobber Drill Bit 7/16 Inch Hss

Product Description

The HERTEL 91049452 is a 7/16 inch high speed steel jobber drill bit designed for general-purpose holemaking in metal, wood, and composite materials. It features a 137-degree split point that reduces walking and requires less feed pressure at the start of the cut. The oxide and TiN coating provides surface hardness and added wear resistance. With an overall length of 5.5 inches and a flute length of 3.125 inches, this is a standard jobber-length bit suited for a wide range of drilling applications. Right-hand spiral flute geometry promotes chip evacuation during use. The heavy-duty grade construction is built for repeated use in demanding shop and field environments.

This drill bit is used by machinists, pipefitters, electricians, HVAC technicians, and general tradespeople for drilling clearance holes, pilot holes, and through-holes in ferrous and non-ferrous metals. The jobber series length makes it versatile across bench drill presses, hand drills, and magnetic drills. It follows ANSI specification standards, making it a straightforward drop-in for standard drill chucks. The 0.4375 inch decimal diameter fits within the 0.4000 to 0.5000 inch size range common to jobber bit sets.

Key Features

• 137-degree split point reduces bit walking and improves hole entry accuracy
• High speed steel construction with oxide and TiN coating for extended wear life
• Right-hand spiral flute promotes efficient chip removal during drilling
• Heavy-duty grade rated for repeated use in demanding applications
• ANSI specification designation ensures dimensional consistency
• 3-flat shank for secure chuck grip and reduced slippage

Compatibility

Designed as a standard jobber-length drill bit compatible with any 3-jaw drill chuck accepting a 7/16 inch round shank. Conforms to ANSI specification standards for jobber series drill bits.

Installation Notes

Install in a properly sized drill chuck and tighten securely using all three chuck key positions before drilling. Ensure the workpiece is clamped or fixtured before beginning the cut. Use appropriate cutting fluid when drilling ferrous metals to extend bit life and improve hole finish. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.