Hertel 61699427 Screw Machine Drill Bit 0.377 in Hss

Product Description

The HERTEL 61699427 is a screw machine length drill bit designed for high-speed drilling in metal, wood, and general-purpose materials. It measures 0.377 inches in diameter, equivalent to letter size V, and features a 118-degree standard drill point angle for broad material compatibility. The bit is manufactured from high speed steel with an oxide finish that provides basic lubricity and surface protection. At 3.25 inches overall length with a 1.875-inch spiral flute, the shorter-than-jobber body improves rigidity and reduces deflection in drill press, turret lathe, and screw machine applications. Machinists, tool-and-die workers, and maintenance technicians are the primary installers.

This bit is suited for production drilling, general shop use, and maintenance applications where a rigid, short-bodied drill is preferred over jobber length. The straight-cylindrical shank seats directly in standard three-jaw drill chucks and collet holders without adapters. Its general-purpose grade and ANSI specification make it a practical stock item for machine shops, production lines, and MRO operations. The 3xD flute-to-diameter ratio supports chip evacuation in shallow-to-moderate depth holes typical of screw machine work.

Key Features

• Letter size V, 0.377-inch diameter for precise hole sizing
• 118-degree standard point angle compatible with a wide range of workpiece materials
• High speed steel construction provides wear resistance in general-purpose cutting
• Oxide finish improves surface lubricity and reduces galling
• Screw machine length body increases rigidity and minimizes deflection versus jobber length
• Right-hand cut, two-flute spiral design for efficient chip removal
• Straight-cylindrical shank fits standard chucks and collet holders without adapters

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI specifications, suitable for use in standard drill presses, turret lathes, screw machines, and CNC drilling setups with three-jaw or collet-style toolholding rated for straight-shank tooling in the 0.350-inch to 0.400-inch diameter range.

Installation Notes

Installation is performed by machinists or maintenance technicians using standard drill press or machine tool setups. Ensure the spindle is fully stopped and locked out before inserting or removing the bit from the chuck or collet. Verify chuck jaws are clean and free of debris before seating the shank to prevent runout. Follow applicable shop safety practices and wear appropriate eye protection during drilling operations.