Hertel 89321194 Screw Machine Drill Bit 1-1/8 in Hss

Product Description

The HERTEL 89321194 is a screw machine length drill bit designed for general-purpose drilling in metal, wood, and composite materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent cutting performance without the added cost of specialty coatings. The 118-degree split point is a standard geometry suited for a wide range of materials and drilling setups. At 1-1/8 inches in diameter with a 6-3/8 inch overall length, this is a stub-length bit that fits standard drill chucks and provides increased rigidity compared to jobber-length equivalents. It is commonly used by machinists, pipefitters, and mechanical contractors working with heavier stock.

This bit is sized for production and maintenance drilling operations where a shorter flute length improves hole accuracy and reduces deflection. The 4-inch flute length accommodates moderate depth requirements without sacrificing stability. Right-hand cut geometry works with standard drill presses, magnetic drills, and portable power drills. It is a practical choice for fabrication shops, HVAC mechanical rooms, and industrial maintenance environments where large-diameter holes are required in structural or heavy-gauge material.

Key Features

• 1-1/8 inch diameter, screw machine (stub) length for added rigidity
• High-speed steel construction for general-purpose metal drilling
• 118-degree point angle, standard geometry for broad material compatibility
• Bright, uncoated finish suitable for standard cutting speeds and feeds
• Right-hand cut for use with conventional drill equipment
• 4-inch flute length supports moderate drilling depth with reduced deflection

Compatibility

Designed as a general-purpose screw machine length drill bit compatible with standard drill press chucks, magnetic base drills, and portable power tools accepting 1-1/8 inch shank or reduced-shank adapters.

Installation Notes

Installation and use of this drill bit should be performed by qualified machinists or tradespeople familiar with large-diameter drilling operations. Ensure the workpiece is securely clamped before drilling and that the drill press or power tool is rated for the required torque at this diameter. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend bit life and maintain cutting edge integrity. Inspect the bit for chipping or wear before each use.