Hertel 61699765 Screw Machine Drill Bit 0.238 in Hss

Product Description

The HERTEL 61699765 is a screw machine length drill bit designed for high-speed steel cutting in metal fabrication, machining, and general-purpose drilling applications. Built from high speed steel with an oxide finish, this bit measures 0.238 inches (letter size B) in diameter and features a 118-degree standard point angle for reliable material entry. The shorter-than-jobber body length improves rigidity and reduces deflection in screw machine and drill press setups. With a 2-flute spiral configuration and straight cylindrical shank, it seats securely in standard drill chucks and collets. It suits production environments and trade shops where consistent hole sizing is required.

This bit is suited for general-purpose drilling in steel, cast iron, aluminum, and similar materials. The screw machine length body, rated at 3xD flute-to-diameter ratio, makes it particularly effective in turret lathes, automatic screw machines, and bench-top drill presses. The overall length of 2.5 inches with a flute length of 1.375 inches keeps the cutting geometry compact and stable under load. Licensed machinists, tool-and-die techs, and maintenance tradespeople are the primary installers and users of this bit.

Key Features

• High speed steel construction with oxide finish for wear resistance and chip evacuation
• 118-degree standard point angle for general-purpose material entry
• Screw machine length body at 2.5 inches overall for improved rigidity over jobber-length bits
• 2-flute spiral configuration with straight cylindrical shank for standard chuck compatibility
• Letter size B designation at 0.238 inches diameter per ANSI specification
• Right-hand cut with regular spiral type for conventional drilling operations

Compatibility

Designed as an ANSI-specification general-purpose screw machine length drill bit suitable for use in standard drill chucks, collets, and turret lathe tooling that accept straight cylindrical shanks in the 0.2000 to 0.2500 inch diameter range.

Installation Notes

A qualified machinist or maintenance technician should install and operate this drill bit. Secure the straight cylindrical shank fully in the chuck or collet before operating to prevent runout or slippage. Power down and lock out the machine before changing bits. Follow applicable ANSI and shop safety standards for speeds and feeds appropriate to the work material and bit diameter.