Hertel 61699559 Screw Machine Drill Bit 0.041in Hss

Product Description

The HERTEL 61699559 is a screw machine length drill bit designed for high-speed steel cutting in tight spaces and short-reach applications. Built from high speed steel with an oxide finish, this bit measures 0.041 inches in diameter and carries a wire gauge designation of number 59. The 118-degree standard point angle makes it suitable for general-purpose drilling in a wide range of materials. At 1.375 inches overall length with a 0.5-inch flute length, the stub-length profile reduces deflection and increases rigidity compared to jobber-length bits. Licensed machinists, tool and die technicians, and precision fabricators typically specify this style for production drilling on screw machine work.

This bit fits applications requiring precise, small-diameter holes in metal, plastics, and composite materials at production volumes. The straight-cylindrical shank seats directly into standard drill chucks, collets, and machine spindles without additional tooling adapters. Its compact screw machine length is well suited for CNC drilling centers, turret lathes, drill presses, and automatic screw machines where clearance is limited and rigidity is critical. The general-purpose grade and ANSI specification designation make it a stock replacement for shop floor and maintenance drilling programs.

Key Features

• 0.041 inches diameter, wire size number 59, for precision small-hole work
• High speed steel construction for durability across ferrous and non-ferrous materials
• Oxide finish reduces friction and provides light corrosion resistance during storage and use
• 118-degree standard point angle for general-purpose drilling in metals and plastics
• Stub screw machine length at 1.375 inches overall reduces deflection and improves hole accuracy
• 2-flute regular spiral design for efficient chip evacuation in short-hole drilling
• Straight-cylindrical shank fits standard drill chucks and collets without adapters

Compatibility

Designed as a general-purpose screw machine length drill bit conforming to ANSI specification, compatible with standard drill chucks and collet holders accepting a straight-cylindrical shank in the 0.041-inch diameter range.

Installation Notes

This bit is installed by qualified machinists and toolroom technicians in drill presses, CNC machining centers, turret lathes, and automatic screw machines. Ensure the machine spindle is fully stopped and locked out before changing bits. Seat the straight shank fully into the chuck or collet and verify runout before beginning production drilling. Cutting speeds and feeds should be set per standard HSS recommendations for the workpiece material to avoid premature edge wear.