Hertel 89320709 Screw Machine Drill Bit 7/16 in Hss

Product Description

The HERTEL 89320709 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and plastics. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers reliable performance in standard shop and field drilling applications. The 118-degree split point angle promotes accurate centering without a pilot hole. At 3-7/16 inches overall length, the shortened body provides added rigidity compared to jobber-length bits, reducing deflection in CNC machines, drill presses, and turret lathes. The 7/16 inch diameter (0.4375 inches decimal) falls within the 0.4000 to 0.4500 inch range, making it a standard selection for structural and mechanical fabrication work.

Screw machine length drill bits are preferred in production environments where machine clearance is limited or where a stiffer bit reduces runout. This bit suits use in manual drill presses, automatic screw machines, and benchtop drilling fixtures. The right-hand cut and standard 118-degree point make it compatible with conventional drill chucks and collet holders found in typical machine shop setups. It is appropriate for machinists, maintenance technicians, pipefitters, and general fabricators working with mild steel, aluminum, and similar materials.

Key Features

• High-speed steel construction for durability in general-purpose metal drilling
• 118-degree drill point angle for accurate entry and reduced walking
• Shortened screw machine length body provides increased rigidity and reduced deflection
• Right-hand cut compatible with standard drill chucks and collet holders
• Bright, uncoated finish suitable for use with cutting fluids
• 2-1/16 inch flute length for efficient chip evacuation

Compatibility

Designed as a general-purpose screw machine length drill bit for use in drill presses, automatic screw machines, turret lathes, and CNC drilling fixtures accepting 7/16 inch round shank tooling.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or maintenance technicians familiar with rotating tool safety. Ensure the drill chuck or collet is fully secured and rated for the shank diameter before operation. Always power down and lock out the machine before changing bits. Use appropriate cutting fluid when drilling ferrous metals to extend tool life and improve finish quality.