Value Collection 01198589 Cobalt Jobber Drill No. 58

Product Description

The VALUE COLLECTION 01198589 is a cobalt jobber-length drill bit sized to wire gauge No. 58, with a decimal diameter of 0.0420 inches. It features a 135-degree split-point tip that self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. The regular spiral flute geometry provides efficient chip evacuation during drilling. With an overall length of 1.625 inches and a flute length of 0.6875 inches, this is a compact, short-series bit intended for precision small-diameter work. It carries a straw finish and is sold individually. Licensed machinists, maintenance technicians, and fabricators are the typical users of this bit.

This drill bit is designed for cutting stainless steel and other hardened materials where high-speed steel bits wear prematurely. Cobalt construction provides the heat resistance required for sustained cutting in tough alloys without losing temper. Typical applications include drilling fastener clearance holes, pilot holes, and through-holes in stainless sheet, plate, and structural stock. The straight cylindrical shank seats directly in standard drill chucks without an adapter, making it compatible with bench drills, drill presses, and hand-held power drills commonly used in fabrication and maintenance shops.

Key Features

• Cobalt construction rated for stainless steel and hardened materials
• 135-degree split-point tip self-centers and reduces walking
• Wire gauge No. 58 diameter — 0.0420 inches decimal equivalent
• Right-hand cutting with regular spiral flute for consistent chip removal
• Straight cylindrical shank fits standard drill chucks without adapters
• Heavy-duty grade construction for extended tool life in demanding cuts

Compatibility

Designed as a heavy-duty replacement jobber drill bit for applications requiring wire gauge No. 58 diameter in cobalt grade; fits any standard drill chuck accepting a 0.0420-inch straight shank.

Installation Notes

Installation is performed by machinists or maintenance technicians using a drill press or hand-held power drill. Secure the shank fully in the chuck jaws before operation and verify runout is within acceptable limits. When drilling stainless steel, use cutting fluid or coolant to extend bit life and prevent work hardening of the material. Do not exceed the recommended speed range for cobalt bits in hard alloys, and avoid excessive feed pressure that can chip the split point.