Hertel C.402.0720 Jobber Drill 7.20 Mm Hss Oxide

Product Description

The HERTEL C.402.0720 is a high speed steel jobber-length drill bit ground to a 7.20 mm (0.2835 inch) diameter with a standard 118-degree point angle. The bit carries an oxide coating that reduces friction and provides light corrosion resistance during drilling operations. At 108 mm overall length with a 75 mm flute length, it falls within the conventional jobber proportions that balance rigidity and reach. The straight-cylindrical shank seats in standard three-jaw drill chucks without adapters. Two right-hand spiral flutes evacuate chips continuously as the tool advances through the workpiece.

This drill bit is suited for general-purpose drilling in mild steel, cast iron, aluminum, wood, and plastics. It is a shop-floor and field staple for machinists, maintenance mechanics, electricians, and plumbers who need a reliable metric-diameter hole in a wide range of base materials. The 7.20 mm diameter falls in the 7.00 mm to 8.00 mm size range, making it a common selection for clearance holes, pilot holes, and through-hole operations in light fabrication and mechanical assembly work.

Key Features

• 7.20 mm (0.2835 inch) diameter, within the 0.2500 to 0.3000 inch decimal range
• 118-degree standard point angle for general-purpose entry and self-centering on flat stock
• High speed steel construction with oxide finish for reduced friction and light rust resistance
• Two right-hand spiral flutes for continuous chip evacuation
• Straight-cylindrical shank fits standard drill chucks without sleeves or adapters
• 108 mm overall length with 75 mm flute length for balanced reach and rigidity

Compatibility

Designed as a general-purpose jobber drill for use in any standard three-jaw drill chuck accepting a straight shank in the 7.00 mm to 8.00 mm diameter range.

Installation Notes

This bit is installed and changed by machinists, maintenance mechanics, and trade professionals using a standard keyed or keyless drill chuck. Secure the straight shank fully within the chuck jaws and tighten before operation to prevent slippage. Use appropriate cutting fluid or lubricant when drilling ferrous metals to extend tool life. Inspect the cutting edges for wear before each use and replace the bit if chipping or dullness is observed.