Drill Bit GRAPHITE HSS Cylindrical 3.2 mm (model 55H015)

GRAPHITE HSS Cylindrical 3.2 mm drill bit is designed for metalworking tasks that require precise, repeatable holes. Manufactured from high-speed steel (HSS), the bit delivers the hardness and heat resistance needed to cut through steel, cast iron and non-ferrous metals. The cylindrical shank fits standard chucks and is suitable for use in hand drills and drill presses for controlled, accurate drilling operations.

Advantages

The HSS material provides good wear resistance and maintains cutting performance at elevated temperatures common in metal drilling. The 3.2 mm diameter enables fine, precise holemaking for pilot holes, fastening points and precision assemblies. A cylindrical shank ensures compatibility with a wide range of drill chucks and simplifies bit changes, while the ground cutting edges deliver consistent concentricity and smooth chip evacuation when used with appropriate speeds and lubrication.

Suitable for

• Drilling holes in mild and alloy steels
• Creating pilot holes for tapping and fastening
• Working with cast iron and non-ferrous metals such as aluminium and brass
• Precision drilling on drill presses and hand drills

Key specifications

• Material: High-speed steel (HSS)
• Shank type: Cylindrical shank for standard chucks
• Diameter: 3.2 mm
• Tip style: Standard twist point suitable for through and blind holes in metal
• Intended use: Metalworking — steel, cast iron, aluminium and other non-ferrous metals

How to use

Secure the drill bit firmly in the chuck, ensuring the shank is inserted straight to maintain concentricity. Select a drilling speed appropriate for the workpiece material — lower speeds for harder steels, higher speeds for softer non-ferrous metals. Use cutting fluid or lubricant for prolonged bit life and improved chip removal when drilling harder metals. Apply steady, moderate feed pressure and clear chips from the hole periodically to avoid overheating and bit breakage.

Usage recommendations

For best results, pre-drill with the GRAPHITE 3.2 mm HSS bit when creating pilot holes for tapping or larger diameter drills. Match cutting speed and coolant to the specific metal type, and replace the bit when wear reduces cutting efficiency to prevent damage to workpieces.