Hertel 61698544 Screw Machine Drill Bit 19/64 in Hss

Product Description

The HERTEL 61698544 is a screw machine length drill bit designed for high-volume drilling in metal, wood, and plastic in shop and production environments. It measures 19/64 inches (0.2969 inches decimal) in diameter with an overall length of 2.75 inches, making it shorter and more rigid than a jobber-length bit. The 118-degree standard point angle provides reliable centering on most common materials without requiring a center punch. Constructed from high-speed steel with an oxide coating, this bit resists heat buildup during extended use. It features a straight-cylindrical shank compatible with standard drill chucks.

Screw machine length bits are used in drill presses, CNC machines, turret lathes, and hand drills where reduced bit length improves rigidity and precision. The 19/64-inch diameter falls within the 0.2500 to 0.3000 inch size range and suits applications such as clearance holes, tapping prep, and through-hole drilling in general-purpose production work. The right-hand cut and regular spiral flute geometry are suited to standard clockwise-rotating spindles. This bit is sized to ANSI specification and is appropriate for machinists, tool-and-die workers, and maintenance professionals.

Key Features

• 19/64 inch (0.2969 inches decimal) diameter with 118-degree standard point for self-starting entry
• High-speed steel construction with oxide coating for heat and wear resistance
• Screw machine length at 2.75 inches OAL improves rigidity over jobber-length alternatives
• 1.5625-inch flute length with 3xD flute-to-diameter ratio for effective chip evacuation
• Right-hand cut, straight-cylindrical shank fits standard drill chucks without modification
• ANSI specification compliance for consistent dimensional accuracy

Compatibility

Designed as a general-purpose screw machine length drill bit suitable for standard three-jaw drill chucks and collet-style holders that accept a straight-cylindrical shank in the 19/64-inch diameter class.

Installation Notes

Installation and use should be performed by machinists or qualified tradespeople familiar with rotating cutting tools. Ensure the drill chuck or collet is fully tightened and the workpiece is securely clamped before starting the spindle. Always wear appropriate eye protection and follow shop-specific speed and feed guidelines for the material being drilled. Inspect the cutting edges for wear or chipping before each use and replace the bit if damage is present.