Hertel 16704322 Drill Bit Size 8 135 Degree Solid Carbide

Product Description

The HERTEL 16704322 is a screw machine length drill bit designed for precision drilling in demanding industrial and trade applications. Built from solid carbide, it delivers the hardness and wear resistance needed when cutting through difficult materials. The bit features a 135-degree split-point tip that reduces walking and enables faster penetration without a center punch. At 0.1990 inches in diameter (wire size 8) with an overall length of 2.25 inches, this stub-length format provides rigidity and minimizes deflection in short-reach drilling setups on lathes, drill presses, and CNC equipment.

This drill bit is suited for machining operations involving cast iron, nickel alloys, stainless steel, titanium alloys, and tool steel. Its screw machine length makes it a practical choice for production environments where chuck clearance is limited or a rigid, low-flex setup is required. The slow spiral flute geometry aids chip evacuation in these tough materials. It is installed and used by machinists, toolroom technicians, and trade professionals working with metal fabrication or precision component manufacturing.

Key Features

• Solid carbide construction for hardness and extended tool life in ferrous and exotic metals
• 135-degree split-point tip reduces drill walking and minimizes the need for center punching
• Screw machine (stub) length of 2.25 inches overall provides rigidity and reduces deflection
• Slow spiral flute geometry promotes chip clearance when drilling dense or gummy alloys
• Bright/uncoated finish suitable for use with cutting fluids and standard machining setups
• Right-hand cut, straight cylindrical shank fits standard drill chucks and collets

Compatibility

Designed as a direct-fit replacement for wire size 8 screw machine length drill bits with a 0.1990-inch straight cylindrical shank, compatible with drill chucks and collets accepting shanks in the 0.1500 to 0.2000-inch range.

Installation Notes

Installation is performed by machinists and toolroom technicians on lathes, drill presses, and CNC machining centers. Secure the shank fully in the chuck or collet before operation, and verify runout with a dial indicator on precision setups. Always power down and lock out the machine before changing tooling. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish.