Hertel 74132242 Screw Machine Drill Bit Size 27 Cobalt

Product Description

The HERTEL 74132242 is a screw machine length drill bit designed for high-productivity drilling in metal, alloy steel, stainless, and other hard materials. Built from cobalt high-speed steel and finished with a TiAlN coating, this bit handles elevated cutting temperatures without losing hardness at the edge. The 135-degree split point starts on contact without a center punch, reducing walking and thrust load. At 2.0625 inches overall length, the short screw machine geometry provides rigidity and stability in drill press, CNC, and hand-held applications. Machinists and fabricators in production and job-shop environments are the primary users.

This drill bit is suited for drilling operations in ferrous and non-ferrous metals where heat buildup is a concern. The screw machine length profile is a common choice in production environments where a shorter, stiffer bit reduces deflection in repetitive through-hole or blind-hole work. The TiAlN coating improves tool life when running at higher surface speeds without coolant-through capability. The straight cylindrical shank fits standard drill chucks across a wide range of equipment.

Key Features

• Cobalt high-speed steel construction for heat and wear resistance in hard materials
• TiAlN coating extends tool life at elevated cutting temperatures
• 135-degree split point reduces thrust and eliminates center-punch requirement
• Screw machine length at 2.0625 inches overall for maximum rigidity and minimal deflection
• Web-thinned parallel web configuration for improved chip evacuation
• Right-hand cut, regular spiral flute with 1 inch flute length

Compatibility

Designed as a screw machine length replacement drill bit for Size 27 wire gauge applications requiring a straight cylindrical shank and 135-degree split point geometry in cobalt TiAlN construction.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or metal fabricators familiar with proper chuck mounting and cutting parameters. Secure the straight shank fully in the chuck and verify runout before beginning a drilling operation. Ensure spindle speed is appropriate for the material and bit diameter to avoid premature edge wear. This bit does not support coolant-through delivery, so external coolant or cutting fluid should be applied as needed per shop practice.