Hertel 61698536 Screw Machine Drill Bit 15/16 in Hss

Product Description

The HERTEL 61698536 is a screw machine length drill bit designed for general-purpose metal drilling in production and maintenance environments. Built from high speed steel (HSS) with an oxide finish, it measures 15/16 inches (0.9375 inches) in diameter with a 118-degree standard point angle. The shortened overall length of 5.75 inches compared to a jobber-length bit provides added rigidity, reducing deflection and chatter during entry. With a 2-flute regular spiral design and a straight-cylindrical shank, this bit seats securely in standard drill chucks and is a common choice for machinists, millwrights, and maintenance technicians working in steel, cast iron, and non-ferrous metals.

Screw machine length drill bits are suited for drilling operations where rigidity is more important than reach. This bit is commonly used in drill presses, lathes, milling machines, and CNC setups. The reduced flute-to-diameter ratio of 3xD and a 3.75-inch flute length make it well-suited for through-holes and blind holes in moderate-depth applications. It is appropriate for both manual and automated machine tool environments in general metalworking shops, fabrication facilities, and industrial maintenance settings.

Key Features

• 15/16 inch (0.9375 inch) diameter for precise hole sizing
• 118-degree standard point angle for general-purpose entry on metals
• High speed steel construction for durability across common work materials
• Oxide coating provides basic lubricity and corrosion resistance
• Screw machine (stub) length at 5.75 inches overall increases rigidity and reduces deflection
• Straight-cylindrical shank fits standard 3-jaw drill chucks and collets
• Right-hand cut with regular 2-flute spiral for efficient chip evacuation

Compatibility

Designed as an OEM-style general-purpose replacement or new-install screw machine length drill bit compatible with standard drill chucks and collet systems accepting a straight-cylindrical shank in the 15/16 inch diameter range.

Installation Notes

Installation and use should be performed by qualified machinists or maintenance technicians familiar with machine tool operation. Ensure the machine spindle is fully stopped and locked out before loading or changing the bit. Secure the shank firmly in the chuck or collet to the full depth of engagement to prevent slippage. Follow applicable ANSI B11 machine safety standards and shop-specific cutting fluid requirements for the work material.