Hertel 89321103 Screw Machine Drill Bit Wire 58 Hss

Product Description

The HERTEL 89321103 is a screw machine length drill bit designed for high-volume drilling in metal, plastic, and general-purpose materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it cuts in a right-hand direction and features a 118-degree split-free point angle suited for flat starting on most workpiece materials. The shortened screw machine length body provides added rigidity compared to jobber-length bits, reducing deflection in close-clearance drilling setups. At 0.0420 inches in diameter (wire gauge size 58) and 1.375 inches overall length, this bit is sized for fine-detail work in precision drilling applications.

This bit is intended for use in screw machine operations, automatic drilling equipment, CNC drilling centers, and hand-held drill presses where a compact, rigid bit length is required. The general-purpose grade makes it suitable for repetitive production drilling in light metals, thermoplastics, and composite materials. Licensed machinists, tool-and-die technicians, and production line operators are the primary installers and users of this tooling. Its small diameter targets precision bore work in tight-tolerance parts where a standard jobber length bit would lack the necessary rigidity.

Key Features

• Wire gauge size 58, equivalent to 0.0420 inches decimal diameter
• 118-degree drill point angle for general-purpose starting on flat surfaces
• High-speed steel construction for durability across production drilling cycles
• Bright, uncoated finish suitable for use with cutting fluids or dry
• Right-hand cut with screw machine length for reduced deflection in rigid setups
• 0.50-inch flute length provides adequate chip clearance for the diameter

Compatibility

Designed as an OEM-style replacement or production consumable for standard screw machine and CNC drilling operations requiring a wire-gauge-size 58 drill bit with a 118-degree point.

Installation Notes

Installation of this drill bit is performed by machinists or tooling technicians in a machine shop or production environment. Secure the bit in a properly sized collet or drill chuck rated for the shank diameter before operation. Ensure the spindle and workpiece are firmly clamped before engaging the feed to prevent bit breakage at this small diameter. Follow applicable shop safety procedures and machine manufacturer guidelines when setting feed rates and spindle speeds for HSS tooling.