Hertel 04138806 Cobalt Jobber Drill No. 33 135 Deg

Product Description

The HERTEL 04138806 is a cobalt jobber-length drill bit in wire gauge size No. 33, with a decimal diameter of 0.1130 inches. It features a 135-degree split point with web thinning, which reduces walking on entry and lowers the thrust force needed to start a hole. The oxide and TiN coating improves surface hardness and extends tool life in demanding materials. At 2-5/8 inches overall length with a 1-1/2-inch flute length, this is a standard jobber-series geometry suited to drill press, hand drill, and CNC drilling operations. Licensed machinists, maintenance technicians, and industrial tradespeople are the primary users.

This drill bit is intended for holemaking in ferrous metals, stainless steel, cast iron, and other hard or abrasive materials where high-speed steel tooling would wear prematurely. The cobalt construction gives it the heat resistance needed for interrupted cuts and dry drilling without coolant. The straight cylindrical shank fits standard three-jaw chucks and collet holders sized for 0.1130-inch shanks. It is sold individually but is subject to a minimum order quantity of 12 units, making it appropriate for shop stocking and tool crib replenishment.

Key Features

• Wire gauge No. 33 diameter — 0.1130 inches decimal equivalent
• 135-degree split point with web thinning reduces walk and entry thrust
• Cobalt construction for heat resistance in hard and abrasive materials
• Oxide and TiN dual coating for extended tool life and reduced friction
• Regular spiral flute, right-hand cutting direction
• Straight cylindrical shank — fits standard three-jaw chucks and collets
• Heavy duty grade with tapered web configuration

Compatibility

Designed as a standard jobber-series drill bit compatible with any drill press, hand drill, or CNC spindle equipped with a chuck or collet accepting a 0.1130-inch straight cylindrical shank.

Installation Notes

Secure the shank fully in the chuck or collet before operation and confirm runout is within acceptable tolerance for the application. No coolant-through capability is present on this bit, so use cutting fluid applied externally when drilling steel or stainless to manage heat buildup. Inspect cutting edges before each use and replace bits showing chipping or heat discoloration at the tip. Follow applicable OSHA machine guarding and PPE requirements when operating drilling equipment.