Drill bit Abraboro AB30008500 HSS-G DIN 338 stepped tip Ø8.5 mm

Twist drill bit Abraboro AB30008500 is made of high-speed steel (HSS-G) to DIN 338 with a stepped cutting tip and nominal diameter Ø8.5 mm. The tool features standard geometry optimized for general metalworking: reliable chip removal, durable cutting edges and stable concentricity. It is intended for through and spot drilling in steels and non‑ferrous metals and can be used in hand-held drills and drill presses for routine workshop and industrial tasks.

Advantages

The HSS-G material provides good heat resistance and hardness under typical drilling speeds, while the DIN 338 manufacturing tolerance ensures consistent diameter and straightness. The stepped tip improves centring and reduces walking at the start of the hole, which helps achieve cleaner entry surfaces. Standard flute geometry promotes efficient chip evacuation and reduces clogging during continuous drilling in metallic materials.

Suitable for

• Through and spot drilling in low to medium hardness steels
• Drilling non‑ferrous metals such as aluminium and brass
• Workshop use with hand-held electric drills
• Stationary drill press operations for production or repair tasks

Key specifications

• Material: High-speed steel (HSS-G)
• Manufacturing standard: DIN 338
• Tip type: Stepped cutting tip
• Nominal diameter: 8.5 mm
• Geometry: Standard twist drill flute design for metalworking
• Typical applications: Through and spot drilling in steels and non‑ferrous metals

How to use

Secure the drill bit in the chuck with correct centring and clamp force. Select appropriate spindle speed and feed rate for the workpiece material; lower speeds are recommended for harder steels, higher speeds for softer non‑ferrous metals. Use cutting fluid or coolant when drilling steels to extend bit life and aid chip removal. Apply steady, moderate feed pressure and withdraw periodically for deep holes to clear chips and avoid overheating. After use, clean the flutes and inspect the cutting edges for wear before storage.

Usage recommendations

For best results, match drill speed and lubrication to the material: use oil-based cutting fluid when drilling steel and light lubrication for aluminium. Replace the bit when cutting edges show visible wear or when hole accuracy degrades. For greater precision, pre-centre with a centre punch or use a pilot drill before drilling the final Ø8.5 mm hole.