Hertel 02387504 Screw Machine Drill Bit Size 57 Tin Hss

Product Description

The HERTEL 02387504 is a screw machine length drill bit designed for short-hole drilling in metal, plastic, and composite materials where rigidity and precision are critical. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, this bit resists wear and runs at higher surface speeds than uncoated HSS. The 135-degree split point starts on contact without a center punch, reducing walking on hard or smooth surfaces. Overall length is 1-3/8 inches with a 1/2-inch flute length, making it well-suited for CNC machines, drill presses, and automatic screw machines where a stub-length tool improves stability and runout control.

This bit fits applications requiring tight tolerances in small-diameter work. Wire size 57 corresponds to 0.0430 inches, placing it in the fine-end range for instrumentation, electronics assembly, light sheet metal, and precision machining work. The straight cylindrical shank seats directly in standard drill chucks and collet-style toolholders. The web-thinned, parallel-web construction reduces thrust load at entry, which is important when drilling thin stock or brittle substrates. Installation by machinists, tool-and-die workers, and production drilling setups is typical.

Key Features

• TiN coating extends tool life and reduces friction compared to bare HSS
• 135-degree split point eliminates need for center-punching on flat or curved surfaces
• Web-thinned parallel web reduces drilling thrust and heat buildup
• Screw machine (stub) length improves rigidity and reduces deflection in tight setups
• Right-hand spiral flute clears chips efficiently on standard forward-rotation spindles
• Straight cylindrical shank compatible with standard drill chucks and collet holders

Compatibility

Designed as an OEM-style replacement or production-stock drill bit for any standard drill chuck or collet holder accepting a 0.0430-inch straight cylindrical shank, including CNC machining centers, drill presses, and automatic screw machines.

Installation Notes

De-energize and lock out the machine spindle before changing tooling per standard lockout/tagout procedures. Seat the shank fully and evenly in the chuck or collet to minimize runout. At this diameter, excessive feed pressure or misalignment will cause breakage; use appropriate feed rates for the workpiece material. Inspect the cutting edges under magnification before use — TiN-coated HSS bits at this size are not practical to resharpen and should be replaced when dull.