Value Collection 01378298 Cobalt Screw Machine Drill Bit

Product Description

The VALUE COLLECTION 01378298 is a cobalt screw machine length drill bit designed for demanding metal drilling applications. Built from heavy-duty cobalt steel with a straw finish, this bit delivers the heat resistance needed when drilling hardened steels, stainless, and tough alloys. The 135-degree split point geometry reduces walking at contact and allows drilling without a center punch in most applications. At 1-15/16 inches overall length, the screw machine format provides added rigidity compared to jobber-length bits, making it well suited for drilling in tight clearances or with a drill press.

This bit is used in production machining, fabrication shops, and maintenance environments where consistent hole quality in hard or abrasive materials is required. The straight shank fits standard drill chucks without modification. The regular spiral with 2 flutes provides efficient chip evacuation during through-hole and blind-hole operations. Right-hand cutting direction is standard for conventional CNC, drill press, and hand-drill use. Minimum order quantity is 12 pieces, with each unit sold individually in packaging of 1.

Key Features

• Cobalt tool material with straw finish for heat resistance in hard-metal drilling
• 135-degree split point reduces thrust force and eliminates walking on contact
• Screw machine length (1-15/16 inches OAL) adds rigidity over jobber-length bits
• 15/16-inch flute length with regular spiral for effective chip clearing
• Straight shank fits standard drill chucks without adapters
• Heavy-duty grade rated for demanding production and maintenance use

Compatibility

Designed as an OEM-style replacement or direct-use drill bit for standard straight-shank drill chucks across drill presses, CNC drilling centers, and hand drills requiring a wire gauge size 29 (0.1360 inch) bit.

Installation Notes

Install into a properly sized collet or drill chuck and tighten securely before operation. Use cutting fluid or coolant where possible to extend bit life when drilling steel or stainless, as cobalt bits are designed to shed heat but benefit from lubrication. Inspect the split point for damage before each use — a chipped or dull tip increases thrust requirements and hole diameter variance. Secure workpieces firmly before drilling to prevent movement and protect the bit.