Hertel 74130048 Cobalt Screw Machine Drill Bit Set 29pc

Product Description

The HERTEL 74130048 is a 29-piece cobalt screw machine length drill bit set designed for heavy-duty drilling in ferrous metals, stainless steel, and hard alloys. Each bit features a 135-degree split-point tip that self-centers on contact, reducing walking and the need for a center punch. The straight shank and bright uncoated finish are standard for these bits. The set covers sizes from 1/16 inch through 1/2 inch in 1/64-inch increments, providing a complete working range for production drilling, maintenance shops, and trade professionals who demand consistent performance in demanding materials.

Screw machine length drill bits are shorter and more rigid than jobber-length bits, making them well suited for drill presses, CNC machines, and hand-held drilling in tight clearances. This set is appropriate for metal fabrication shops, HVAC installers drilling sheet metal and structural steel, plumbers boring through metal framing, and electricians working with metal enclosures and panel boxes. The metal and plastic storage case keeps bits organized and indexed by size for fast selection on the job.

Key Features

• Cobalt tool material provides heat resistance for drilling hard and abrasive metals
• 135-degree split-point tip self-centers and reduces thrust required during entry
• Screw machine length body offers increased rigidity over jobber-length bits
• Straight shank compatible with standard drill chucks and CNC tool holders
• Bright uncoated finish allows visual inspection for wear during use
• 29-piece set spans 1/16 inch to 1/2 inch in 1/64-inch step increments

Compatibility

Designed as a general-purpose replacement or upgrade set for facilities and trade professionals requiring screw machine length cobalt drill bits with straight shanks; compatible with any standard drill chuck accepting straight-shank tooling.

Installation Notes

Installation of this bit set is performed by machinists, maintenance technicians, and licensed trade professionals using drill presses, hand-held drills, or CNC equipment. Ensure the drill is powered off and the chuck is fully released before inserting or removing a bit. Secure the workpiece firmly before drilling to prevent rotation and bit breakage. Bits should not be used on materials or at speeds outside the manufacturer recommendations for cobalt tooling.