Hertel 74129446 Cobalt Jobber Drill Bit Set 15 Pc

Product Description

The HERTEL 74129446 is a 15-piece cobalt jobber length drill bit set designed for metalworking and multipurpose drilling applications. Built from M42 or equivalent cobalt high-speed steel, these bits hold up under the heat generated when drilling hard metals including stainless steel, cast iron, and alloy steels. The 135-degree split-point tip reduces walking and allows faster penetration without a center punch. Bit sizes run from 1/16 inch through 1/2 inch in 1/32-inch step increments, covering the wire gauge range from #60 to #1. The bright uncoated finish keeps the surface free of coating buildup that can flake off during hard-metal drilling. The set ships in a case for organized storage on the job or at the bench.

This set fits standard metalworking workflows in fabrication shops, maintenance facilities, and field service environments. The inch-system sizing makes it compatible with standard drill presses, hand drills, and magnetic base drills commonly used by millwrights, HVAC technicians, electricians, and plumbers when drilling sheet metal, structural steel, and equipment panels. The 1/2-inch maximum hole size covers the majority of fastener and conduit knockout applications encountered in commercial and industrial trade work. The heavy-duty classification means these bits are rated for repeated use in production-style drilling, not just occasional light-duty tasks.

Key Features

• Cobalt construction handles high-heat drilling in hard metals including stainless and alloy steels
• 135-degree split-point tip starts on contact, reducing the need for center punching
• 15-piece inch-system set covering 1/16 inch to 1/2 inch in 1/32-inch increments
• Bright uncoated finish eliminates coating delamination risk during aggressive drilling
• Wire gauge range from #60 to #1 for precision and standard fastener sizing
• Includes metal or plastic storage case for bit organization and protection

Compatibility

Designed as an OEM-style replacement or direct addition to jobber length drill bit inventories for inch-system metalworking applications in trade and industrial environments.

Installation Notes

Cobalt drill bits should be installed in a keyed or keyless chuck rated for the shank diameter and tightened securely before use. Always power down the drill press or unplug the hand drill before changing bits. Use cutting fluid or cutting oil when drilling hard metals to extend bit life and reduce heat buildup. Follow applicable OSHA and shop safety standards, including eye protection and secure workpiece clamping, during all drilling operations.