Hertel 84581032 Jobber Drill Bit No 29 Hss 135 Deg

Product Description

The HERTEL 84581032 is a No. 29 wire-size jobber-length drill bit designed for general-purpose holemaking in metal, wood, and composite materials. Built from high speed steel with an oxide coating, it runs a 135-degree split point that self-centers on contact and reduces the need for a center punch. The bit measures 2.875 inches overall length with a 1.75-inch flute length, and carries a 0.1360-inch decimal diameter. The heavy-duty grade construction suits repetitive production drilling as well as maintenance and repair work. Machinists, tool-and-die workers, HVAC technicians, and electricians reach for this size when drilling pilot holes or clearing standard wire-size clearance holes.

This jobber drill is sized to the No. 29 wire gauge standard, which corresponds to a 0.1360-inch diameter. It fits drill chucks on portable hand drills, drill presses, and CNC machining centers that accept a 0.1360-inch straight cylindrical shank. The oxide coating provides mild lubricity and surface hardness for extended cutting life in ferrous materials. Its regular-spiral, two-flute design clears chips efficiently in through-hole and blind-hole applications across light steel, aluminum, brass, and similar metals.

Key Features

• No. 29 wire size, 0.1360-inch diameter — matches standard wire-gauge drill charts
• 135-degree split point with web thinning self-centers and reduces thrust requirement
• High speed steel construction with oxide coating for extended tool life in ferrous metals
• 2.875-inch overall length with 1.75-inch spiral flute for chip evacuation in deeper holes
• Straight cylindrical shank fits standard 3-jaw drill chucks without an adapter
• Right-hand cutting direction, two regular-spiral flutes, tapered web configuration

Compatibility

Designed as a standard jobber-length drill bit for use in any drill press, hand drill, or machining center accepting a 0.1360-inch straight cylindrical shank. Conforms to NAS specification designation for wire-size jobber drills.

Installation Notes

A licensed machinist or qualified tradesperson should secure the shank fully in the chuck and verify concentricity before drilling. Always wear appropriate eye protection and secure the workpiece before starting the spindle. When drilling steel, apply cutting fluid to extend bit life and improve hole finish. Inspect the cutting edges for wear or chipping before each use and replace the bit when the split point shows visible dullness to avoid work-hardening the base material.