Hertel 04138830 Cobalt Jobber Drill No 36 135 Deg

Product Description

The HERTEL 04138830 is a cobalt jobber-length drill bit designed for holemaking in hard and abrasive materials. Built to heavy-duty grade standards, it features a 135-degree split point that reduces walking on contact and lowers the thrust required to start a hole. The oxide and TiN coating improves surface hardness and extends tool life in demanding drilling applications. At 2.5 inches overall length with a 1.4375-inch flute, this bit fits standard drill chucks via its straight-cylindrical shank. The 0.1065-inch diameter corresponds to No. 36 wire gauge sizing. Licensed trades and industrial machinists use this bit for repetitive production drilling where standard HSS tools wear prematurely.

This drill bit is suited for metalworking applications in HVAC fabrication, electrical panel work, plumbing rough-in, and general mechanical assembly where tight-tolerance holes in steel, stainless, or hard alloy are required. The regular spiral flute evacuates chips efficiently in through-hole and blind-hole operations. The web-thinned, tapered web construction reduces cutting resistance at the center of the bit, making it well suited for hand-held and drill-press use on harder base metals where a standard jobber bit would overheat or dull quickly.

Key Features

• No. 36 wire size, 0.1065-inch diameter for precise small-hole work
• 135-degree split point with web thinning reduces thrust and prevents walking
• Cobalt construction with oxide and TiN coating for extended life in hard metals
• Regular spiral flute with tapered web for efficient chip evacuation
• Straight-cylindrical shank compatible with standard drill chucks
• Right-hand cutting, heavy-duty grade jobber series

Compatibility

Designed as a standard jobber-series drill bit for use in any drill press, CNC drill, or hand-held power drill equipped with a chuck sized for a 0.1065-inch straight shank.

Installation Notes

Installation is performed by machinists, millwrights, and licensed trades requiring precision small-diameter holes. Secure the straight shank firmly in the chuck before operation and verify chuck key is removed before powering the tool. Use appropriate cutting fluid or cooling when drilling stainless or hard alloy to prevent overheating and premature coating breakdown. Do not exceed the recommended feed rate for the base material, and allow the split point to fully engage before applying full feed pressure.