Hertel 61698437 Screw Machine Drill Bit 1.25 in Hss

Product Description

The HERTEL 61698437 is a screw machine length drill bit designed for high-speed drilling in metal fabrication, maintenance, and general industrial applications. Built from high speed steel with an oxide finish, this bit offers a 1.25-inch diameter and a compact overall length of 6.75 inches, making it well-suited for work in tighter setups where a jobber-length bit would be unwieldy. The 118-degree standard point angle provides reliable centering on flat and curved surfaces. With two spiral flutes and a 3xD flute-to-diameter ratio, chip evacuation is efficient during moderate-depth holes. The straight-cylindrical shank seats securely in standard drill chucks and machine spindles.

This bit is intended for general-purpose drilling in production and maintenance environments. Screw machine length bits are commonly specified when rigidity and reduced deflection matter more than extended reach. Typical applications include metal fabrication shops, machine shops, and maintenance operations where consistent, repeatable hole quality in steel and similar materials is required. The ANSI-specification designation confirms dimensional conformance to standard tooling systems. This bit is sold individually and carries no coolant-through capability, making it best suited for conventional drilling with standard cutting fluids applied externally.

Key Features

• 1.25-inch diameter with 4.375-inch flute length for controlled cutting depth
• High speed steel construction with oxide finish for corrosion resistance and reduced friction
• 118-degree standard drill point for reliable starting on flat and round surfaces
• Two regular spiral flutes promote chip clearance during drilling
• Straight-cylindrical shank compatible with standard drill chucks and machine spindles
• ANSI specification designation ensures dimensional compliance with standard tooling

Compatibility

Designed as an OEM-style general-purpose drill bit compatible with standard drill chucks and machine spindles accepting a straight-cylindrical shank in the 1.25-inch diameter range.

Installation Notes

Installation and use should be performed by a qualified machinist or tooling technician. Secure the straight-cylindrical shank fully in the drill chuck before operation and verify runout before cutting. Apply an appropriate cutting fluid externally, as this bit does not support coolant-through delivery. Inspect the cutting edges for wear or chipping before each use and replace the bit if edge integrity is compromised.