Hertel 2386530 Screw Machine Drill Bit Size 46 Hss

Product Description

The HERTEL 2386530 is a screw machine length (stub) drill bit designed for high-production drilling in metal fabrication, machining, and assembly applications. Built from high-speed steel with an oxide finish, it carries a wire gauge Size 46 designation, equivalent to 0.081 inches in decimal. The 135-degree split point reduces walking on entry and requires less feed pressure compared to conventional 118-degree points. Web thinning at the tip further reduces cutting resistance, making this bit well-suited for hand drilling, drill press work, and CNC short-hole operations where rigidity and accuracy matter.

Screw machine length bits are shorter than jobber-length bits, which increases rigidity and reduces deflection in tight clearance setups or guided jigs. This bit is appropriate for drilling into mild steel, aluminum, brass, and similar materials where a small-diameter, controlled hole is needed. The straight-cylindrical shank seats directly in standard drill chucks without requiring a collet adapter. Machinists, tool-and-die workers, sheet metal fabricators, and maintenance technicians commonly reach for this size when working with small fastener clearance holes or pilot holes.

Key Features

• Size 46 wire gauge diameter, 0.081 inches decimal equivalent
• 135-degree split point reduces walking and lowers entry force
• Web-thinned parallel web for reduced thrust and improved chip evacuation
• Oxide coating provides mild lubricity and corrosion resistance during storage and use
• Screw machine (stub) length increases rigidity over jobber-length alternatives
• Right-hand spiral flute, suitable for standard clockwise-rotating spindles

Compatibility

Designed as a direct-fit replacement for standard wire gauge Size 46 screw machine length drill bits with a straight-cylindrical shank, compatible with any drill chuck or machine spindle that accepts a 0.081-inch straight shank.

Installation Notes

Install the bit fully into the chuck and tighten with a chuck key before starting the spindle. Always power down and de-energize the machine before changing bits. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life and maintain hole quality. Discard the bit if the cutting edges show chipping or the point geometry is visibly damaged, as regrinding small-diameter bits below 0.1 inches is generally impractical in the field.