Hertel 74130246 Cobalt Screw Machine Drill Bit 13/64 in

Product Description

The HERTEL 74130246 is a cobalt screw machine length drill bit designed for high-speed drilling in tough materials including stainless steel, high-strength alloys, and hardened steels. It measures 13/64 inches (0.2031 inches decimal) in diameter with an overall length of 2.25 inches and a flute length of 1.1875 inches. The 135-degree split point reduces walking on entry and requires less thrust than a conventional 118-degree point. The web-thinned, parallel web configuration improves chip evacuation and lowers cutting resistance. Right-hand cutting with a regular spiral flute pattern. This bit is installed by machinists, maintenance technicians, and skilled tradespeople working with drill presses, CNC machines, and hand-held power drills.

Screw machine length bits are shorter than jobber-length bits, which increases rigidity and reduces deflection in close-tolerance or interrupted-cut applications. The compact overall length of 2.25 inches makes the HERTEL 74130246 well suited for drilling in confined spaces or fixtures where a standard-length bit would be impractical. The cobalt construction allows operation at higher surface speeds than standard high-speed steel, making it a common choice for production environments drilling stainless, titanium, and other work-hardening materials. The straw finish indicates a heat-treated cobalt substrate without additional surface coating.

Key Features

• Cobalt (HSCO) construction for improved heat and wear resistance compared to standard HSS
• 135-degree split point reduces drill walk and lowers required feed pressure
• Web-thinned parallel web for improved chip flow and reduced thrust load
• Screw machine length body (2.25 inches OAL) provides extra rigidity and reduced deflection
• Right-hand cut, regular spiral flute, straight cylindrical shank for standard chuck compatibility
• No coolant-through requirement; suitable for dry or flood-coolant use

Compatibility

Designed as a screw machine length replacement drill bit for standard straight-shank drill chucks; fits any drill press, turret lathe, CNC machining center, or hand drill accepting a straight cylindrical shank in the 13/64-inch diameter range.

Installation Notes

Install in a properly sized straight-shank chuck and tighten securely before operation. De-energize and lock out the machine before changing bits. Inspect the cutting edges and split point for chipping or heat damage before each use; a damaged point increases the risk of breakage. Follow the machine manufacturer and applicable workplace safety guidelines for spindle speeds appropriate to the workpiece material and bit diameter.