Hertel 61699740 Drill Bit Letter J 118 Degree Hss

Product Description

The HERTEL 61699740 is a screw machine length drill bit sized to Letter J (0.2770 inches decimal equivalent) and designed for general-purpose metal drilling in production and maintenance environments. Built from high-speed steel (HSS) with an oxide coating for heat and wear resistance, this bit features a standard 118-degree point angle suited to a wide range of ferrous and non-ferrous materials. The shorter-than-jobber overall length of 2-11/16 inches reduces deflection and increases rigidity, making it a preferred choice for screw machine operations, drill press work, and hand drilling where precision entry matters. It is installed and used by machinists, maintenance technicians, and general metalworking trades.

This bit is intended for general-purpose drilling in screw machine, drill press, and light CNC applications. Its straight cylindrical shank seats securely in standard 3-jaw chucks and collet holders. The 1-1/2-inch flute length and regular spiral flute geometry provide reliable chip evacuation across a drill bit size range of 0.2500 to 0.3000 inches, keeping it at home in both production line and job shop settings. No coolant-through capability means it is best suited to moderate-duty cutting with conventional flood or spray cooling as needed.

Key Features

• Letter J size - 0.2770 inches decimal equivalent, within the 0.2500 to 0.3000 inch range
• 118-degree standard point angle for versatile use on a broad range of materials
• High-speed steel construction with oxide coating for improved heat resistance and tool life
• Screw machine (stub) length body - 2-11/16 inches OAL - reduces deflection compared to jobber-length bits
• Regular spiral, 2-flute design promotes efficient chip evacuation
• Straight cylindrical shank fits standard 3-jaw chucks and collet holders without adapters
• Meets ANSI specification designation; Series HSH118-OX

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with any standard drill press, screw machine, or handheld drill equipped with a chuck or collet sized to accept a straight cylindrical shank in the Letter J diameter class.

Installation Notes

Secure the shank fully in the chuck or collet and verify runout before drilling. Always power down or de-energize the machine and allow the spindle to come to a complete stop before changing or inspecting bits. Use appropriate cutting fluid or coolant for the workpiece material to extend tool life and maintain dimensional accuracy. Inspect the cutting edges for wear or chipping before each use and replace the bit if the point shows signs of dulling or damage.