RUKO ZEB-HSS-DIN333-A-6,3mm centerboor

Machinists and metalworkers use the RUKO ZEB-HSS-DIN333-A-6.3mm center drill to prepare workpieces for turning or grinding between centers. The 60° point angle and 2.5 mm pilot hole create a precise starting point for subsequent drilling operations.

Key specifications

• Drill bit type: Centering drill bit
• Standard: DIN 333 A
• Material: High-Speed Steel (HSS-G)
• Body diameter (d1): 6.3 mm
• Pilot hole diameter (d): 2.5 mm
• Overall length (l1): 50 mm
• Point angle: 60°
• Shank type: Straight shank
• Cutting direction: Right-hand cut
• Number of flutes: 2
• Flute length (l2): 10 mm
• Shank tolerance: h8
• Surface treatment: Bright finish
• Manufacturing process: Ground flutes
• Product series: Würth ZEBRA

Why choose it

The HSS-G construction with ground flutes provides sharp cutting edges and reliable performance in steel, cast iron, and non-ferrous metals. The DIN 333 A geometry ensures accurate centering and chamfering in one operation.

Ideal use cases

• Preparing workpieces for turning or grinding between centers
• Centering, spotting, and chamfering on drilling machines and lathes
• Creating pilot holes for subsequent drilling operations

Good to know

The straight shank with h8 tolerance fits standard drill chucks. The bright finish reduces friction and improves chip evacuation.