Hertel 04139002 Cobalt Jobber Drill Bit Wire 53 135 Deg

Product Description

The HERTEL 04139002 is a cobalt jobber-length drill bit in wire gauge size 53, with a decimal diameter of 0.0595 inches. It features a 135-degree split point for reduced walking on entry and faster penetration into harder materials. The oxide and TiN coating improves surface hardness and heat resistance during extended drilling cycles. The spiral flute with regular helix promotes efficient chip evacuation in through-hole applications. This bit is suited for machinists, maintenance technicians, and trade professionals working with ferrous metals, stainless steel, and other hard alloys where standard HSS tooling wears prematurely.

This drill bit is designed for holemaking operations in metal fabrication, mechanical maintenance, and industrial repair environments. The straight cylindrical shank seats in standard drill chucks and CNC spindles without modification. At 1-7/8 inches overall length with a 7/8-inch flute length, it is appropriate for shallow-to-moderate depth holes in tight clearance applications. The web-thinned, tapered web construction reduces thrust load and is particularly useful when working with drill presses or hand-held power tools in production settings.

Key Features

• Wire gauge size 53 with 0.0595-inch decimal diameter for precision hole sizing
• 135-degree split point reduces drill walking and lowers entry thrust
• Cobalt construction with oxide and TiN coating for heat and wear resistance in hard metals
• Web-thinned tapered web decreases cutting force and extends tool life
• Right-hand spiral flute with regular helix for consistent chip evacuation
• Heavy-duty grade rating suited for demanding production and maintenance drilling

Compatibility

Designed as a jobber-length replacement drill bit for use in standard drill chucks and CNC tool holders accepting a 0.0595-inch straight cylindrical shank.

Installation Notes

Installation is performed by machinists or maintenance technicians familiar with metal cutting operations. Secure the shank fully in the chuck or collet before operation and confirm runout is within acceptable tolerance for the application. Always wear appropriate eye and face protection when drilling metal. Use recommended cutting fluid or coolant for the base material to extend tool life and maintain hole quality.