Hertel 61699542 Screw Machine Drill Bit Wire 53 Hss

Product Description

The HERTEL 61699542 is a screw machine length drill bit designed for short-hole drilling and spot-drilling applications in metal, plastic, and general-purpose materials. Built from high-speed steel with an oxide coating for basic lubricity and corrosion resistance, this bit features a 118-degree standard point angle and a right-hand spiral flute configuration. It measures 1-5/8 inches overall length with a 5/8-inch flute length, making it compact enough for use in turret lathes, screw machines, and tight-clearance drill press setups. The straight-cylindrical shank seats directly into standard chucks without an adapter.

This bit is sized to wire gauge 53, equivalent to 0.0595 inch diameter, placing it in the small-diameter range suited for tapping pilot holes, clearance holes for small fasteners, and precision layout work. The 3xD flute-to-diameter ratio supports chip evacuation in short-bore operations. Typical users include machinists, tool-and-die workers, pipefitters, and maintenance technicians working on metal fabrication or fixture assembly. The short body length reduces deflection and improves positional accuracy compared to jobber-length bits of the same diameter.

Key Features

• Wire size 53 (0.0595 inch diameter) for small-fastener pilot and clearance holes
• High-speed steel construction for durability across general-purpose materials
• Oxide coating provides basic lubricity and corrosion resistance
• 118-degree standard point angle for self-centering on flat stock
• Screw machine length (1-5/8 inches OAL) reduces deflection in close-tolerance work
• Right-hand cut with 2-flute spiral for efficient chip clearing

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI specification, suitable for use in standard three-jaw chucks, collet chucks, and screw machine spindles accepting a straight-cylindrical shank at 0.0595 inch diameter.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill press, lathe turret, or hand-drill equipment. Secure the straight shank fully in the chuck and verify runout before drilling. Apply cutting fluid appropriate to the workpiece material to extend tool life on ferrous metals. Replace the bit if tip geometry shows signs of wear or chipping, as small-diameter bits are sensitive to side loading and re-sharpening is generally not practical at this diameter.