Hertel 01778182 Cobalt Drill Bit 1/4 in 135 Deg Split Point

Product Description

The HERTEL 01778182 is a short-length cobalt threaded shank drill bit designed for drilling into high-tensile strength metals. It features a 135-degree split point with web thinning, which reduces walking on entry and lowers the thrust needed to start a hole. The 1/4-28 threaded shank provides a positive mechanical connection to compatible quick-change tooling rather than relying on friction alone. At 1.25 inches overall length, this is a compact stub-style bit suited for confined-space drilling. The oxide coating adds a measure of corrosion resistance and surface hardness. Right-hand cutting with a regular spiral flute handles chip evacuation in ferrous and non-ferrous high-strength alloys.

This bit is intended for use in metalworking applications where the workpiece material is a high-tensile strength metal such as stainless steel, hardened alloy steel, or similar tough stock. The short overall length and threaded shank make it a practical choice for production drilling, maintenance work, and repair tasks where a standard-length bit cannot reach or cannot be held securely. It is commonly used by machinists, maintenance technicians, and industrial trades working with drill motors or presses fitted for 1/4-28 threaded-shank tooling.

Key Features

• Cobalt construction with oxide coating for durability in high-tensile strength metal applications
• 135-degree split point with web thinning reduces entry walking and lowers required thrust
• 1/4-28 threaded shank provides positive, rattle-free retention in compatible tooling
• Short stub-style body at 1.25 inches overall length for confined-space access
• Right-hand, regular spiral flute with tapered web for consistent chip flow
• Meets NAS 965 Type D specification

Compatibility

Designed for use with drill motors and fixtures that accept a 1/4-28 threaded shank. Verify that the receiving tool or quick-change adapter is rated for a 1/4-28 thread engagement before installing.

Installation Notes

Installation and use should follow standard machine shop safety practices. Ensure the drill motor or press is powered down and locked out before changing bits. Thread the shank fully into the adapter or chuck and confirm engagement before applying power. Use appropriate cutting fluid or lubricant when drilling high-tensile strength alloys to manage heat buildup and extend bit life.