Hertel 42096 Cobalt Jobber Drill Bit 9.5mm 135deg

Product Description

The HERTEL 42096 is a cobalt jobber length drill bit designed for drilling into hard and abrasive materials including stainless steel, high-alloy steels, and hardened workpieces. Built from M35 cobalt high-speed steel, it carries an oxide and gold coating that improves heat resistance and surface lubricity. The bit measures 9.5 mm (0.374 inches) in diameter with a 135-degree split point for fast, self-centering starts and reduced walking on flat surfaces. Overall length is 125 mm (4.921 inches) with a flute length of 81 mm (3.189 inches). A regular spiral, right-hand cutting flute pattern promotes efficient chip evacuation during through-hole operations. Machinists, maintenance technicians, and metal fabricators use this bit in drill presses, mills, and hand-held power drills.

This drill bit suits production and maintenance drilling applications where tool longevity under heat and friction is a priority. It performs well in ferrous metals, stainless grades, and other materials that generate high cutting temperatures. The straight cylindrical shank fits standard 3-jaw chucks without modification. It is sold individually and is appropriate for both shop floor production runs and field repair work where a reliable, durable bit is required in the 9.00 mm to 10.00 mm diameter range.

Key Features

• M35 cobalt high-speed steel construction for heat and wear resistance in hard metals
• 135-degree split point reduces thrust and self-centers on contact
• Oxide and gold coating improves lubricity and extends tool life
• Regular right-hand spiral flute promotes consistent chip removal
• Straight cylindrical shank fits standard drill chucks without adapters
• No coolant-through design suits standard drill press and hand-drill setups

Compatibility

Designed as a jobber length drill bit fitting standard 3-jaw chucks accepting straight cylindrical shanks in the 9.00 mm to 10.00 mm diameter range.

Installation Notes

A licensed machinist or qualified technician should secure the workpiece firmly before drilling to prevent movement and bit breakage. Power down and de-energize all equipment before changing bits. Use appropriate cutting fluid when drilling stainless or high-alloy steels to manage heat buildup, even though this bit does not feature coolant-through channels. Follow applicable shop safety standards and machine manufacturer guidelines for spindle speed and feed rate selection.