RUKO SPB-DIN338-23/64-HSSCo Twist Drill Bit 9.128mm DIN 338 HSS-Co 5% Cobalt

Precision-ground from HSS-Co with 5% cobalt, this RUKO twist drill bit delivers a 135° split point for self-centering starts and a 23/64 inch (9.128 mm) diameter that holds tolerance h8.

Overview

Engineered for demanding materials, the SPB-DIN338-23/64-HSSCo is a fully ground twist drill bit conforming to DIN 338. Its cylindrical shank fits standard drill chucks, and the bright finish reduces friction for cleaner holes.

What stands out

• HSS-Co with 5% cobalt withstands high temperatures and abrasive wear
• 135° split point eliminates walking and reduces thrust pressure
• Right-hand spiral flutes evacuate chips efficiently
• h8 tolerance ensures consistent hole diameter

Technical details

• Diameter: 23/64 inch (9.128 mm)
• Overall length: 125 mm
• Flute length: 81 mm
• Point angle: 135°
• Point type: Split point
• Shank: Cylindrical
• Material: HSS-Co (5% cobalt)
• Standard: DIN 338
• Tolerance: h8
• Finish: Bright
• Flute type: Right-hand spiral
• Manufacturing: Fully ground
• Recommended for: Stainless steel, alloyed and unalloyed steel, cast iron, non-ferrous metals up to 1100 N/mm²

Our verdict

A professional-grade cobalt drill bit that excels in tough steels and stainless alloys. The split point and precise grinding make it a reliable choice for accurate, repeatable holes.