Hertel 74132309 Drill Bit Size 33 Cobalt Tialn 135 Deg

Product Description

The HERTEL 74132309 is a screw machine length (stub-length) drill bit engineered for high-production drilling in metals and hard materials. Built from cobalt high-speed steel and finished with a TiAlN (titanium aluminum nitride) coating, this bit handles elevated cutting temperatures better than standard HSS tooling. The 135-degree split point self-centers on contact, reducing the need for a center punch and minimizing walking on flat or curved surfaces. At 1.875 inches overall length with a 0.875-inch flute, the stub-length design provides added rigidity for tight setups. This bit is sized to wire gauge Number 33, equivalent to 0.1130 inch decimal. It is used by machinists, tool-and-die technicians, and metalworking trades.

This drill bit is suited for production drilling operations in steel, stainless steel, cast iron, and other ferrous and hard alloy materials. The stub-length geometry makes it appropriate for use in CNC machining centers, drill presses, and hand-held pneumatic or electric drills where tool rigidity and runout control matter. It fits applications requiring consistent hole quality in the 0.1000- to 0.1500-inch decimal size range. The right-hand spiral flute and parallel web configuration support efficient chip evacuation in through-hole and blind-hole drilling.

Key Features

• Cobalt HSS construction resists heat buildup during extended drilling cycles in hard metals
• TiAlN coating increases surface hardness and extends tool life compared to uncoated cobalt bits
• 135-degree split point self-centers and reduces thrust load at drill entry
• Stub-length (screw machine length) body maximizes rigidity and reduces deflection
• Web-thinned, parallel web configuration improves chip flow and reduces cutting torque
• Straight-cylindrical shank fits standard drill chucks without adapters

Compatibility

Designed as a direct-fit screw machine length drill bit for any standard drill chuck or collet accepting a straight-cylindrical shank in the 0.1130-inch diameter range, covering the decimal inch size range of 0.1000 to 0.1500 inch.

Installation Notes

This bit is installed and used by machinists and metalworking tradespeople following standard drill press or CNC setup procedures. Secure the shank fully in the chuck or collet and verify runout before beginning a cut. Use appropriate cutting fluid or coolant for the workpiece material, as this bit does not support internal coolant-through delivery. Inspect the cutting edges and coating condition before each use and replace the bit if chipping or coating breakdown is observed.