Hertel 74130493 Cobalt Drill Bit 5/8 Inches 135 Degree Split Point

Product Description

The HERTEL 74130493 is a screw machine length cobalt drill bit designed for demanding drilling applications in stainless steel and tough alloys. Built from high-speed cobalt steel (HSCO) with a 135-degree split point, this bit reduces walking on entry and generates less heat when cutting hard materials. The 5/8-inch diameter and shortened overall length of 4.25 inches make it suited for confined-clearance drilling on manual lathes, drill presses, and CNC setups. A web-thinned, parallel web configuration lowers thrust requirements and improves chip evacuation through the regular spiral flutes.

Screw machine length drill bits are a standard choice in metalworking shops, maintenance departments, and field service environments where drill depth is limited or rigidity is critical. This bit is appropriate for drilling stainless steel, heat-treated alloys, and other materials that generate significant tool wear. It is commonly used by machinists, pipefitters, and mechanical contractors when standard jobber-length bits flex too much or when working inside enclosures and tight frames. The right-hand cutting direction and straight cylindrical shank allow direct chucking in standard 3-jaw drill chucks and collet holders without adapters.

Key Features

• Cobalt (HSCO) construction handles stainless steel and tough alloys without premature edge wear
• 135-degree split point reduces center-walking and lowers required thrust at entry
• Web-thinned parallel web improves chip flow and reduces heat buildup at the tip
• Screw machine (stub) length at 4.25 inches overall provides greater rigidity than jobber-length bits
• Regular spiral flutes with 2.75-inch flute length clear chips efficiently in through-hole drilling
• Straight cylindrical shank fits standard drill chucks and collet systems without modification

Compatibility

Designed as an OEM-style replacement and standard-fit cobalt drill bit for use in any drill press, lathe tailstock, or CNC machine tool equipped with a straight-shank chuck or collet sized for a 5/8-inch diameter shank.

Installation Notes

Ensure the drill press or machine tool spindle is fully stopped and de-energized before installing or removing the bit from the chuck. Secure the straight shank firmly in the chuck jaws and verify runout before beginning the cut. Use appropriate cutting fluid or coolant for stainless steel and tough alloy workpieces to extend tool life, as this bit does not support through-coolant delivery. Wear approved eye protection and follow applicable OSHA machine guarding requirements during operation.