Hertel 42126 Cobalt Jobber Drill Bit 3/32 Inch 135 Deg

Product Description

The HERTEL 42126 is a cobalt jobber-length drill bit designed for drilling into hard and abrasive materials where standard high-speed steel bits wear prematurely. Built from M35 cobalt steel, it carries a 135-degree split point that reduces walking on entry and lowers the thrust needed to start a hole. The bit measures 3/32 inch (0.0938 inch decimal) in diameter with an overall length of 2.25 inches and a flute length of 1.25 inches. A right-hand, regular spiral flute configuration provides efficient chip evacuation. The straw oxide finish indicates heat treatment consistent with heavy-duty cutting applications. Licensed tradespeople and machinists reach for this size when working on tight-tolerance or confined-access drilling tasks.

This drill bit is sized for work on stainless steel, hardened materials, and other ferrous metals that generate significant heat at the cutting edge. The 3/32-inch diameter makes it a common choice for pilot holes, precision through-holes, and sheet metal work where a larger bit would remove too much material. At a 5xD flute-to-diameter ratio, it handles moderate-depth holes without packing chips. The straight cylindrical shank seats in standard drill chucks without any special collet or adapter.

Key Features

• M35 cobalt steel construction for heat resistance in stainless steel and hardened material drilling
• 135-degree split point reduces bit walking and lowers entry thrust
• Right-hand regular spiral flute for reliable chip evacuation
• Straw oxide finish consistent with heavy-duty grade designation
• Straight cylindrical shank fits standard drill chucks
• No coolant-through requirement simplifies handheld and bench drill press use

Compatibility

Designed as an OEM-style jobber drill bit suitable for use in standard drill presses, handheld drills, and CNC drilling operations accepting a straight cylindrical shank in the 3/32-inch diameter range.

Installation Notes

Installation is performed by qualified machinists or tradespeople familiar with metal drilling practices. Secure the workpiece firmly before drilling to prevent bit deflection or breakage at this small diameter. Use cutting fluid when drilling stainless steel or hardened materials to extend bit life and reduce heat buildup. Inspect the cutting edge before each use — cobalt bits can chip if subjected to side loading or used on improperly clamped stock.