RUKO SPB-TX-DIN338-HSSCo-Ø12.0mm HSS-Co5 Fully Ground Twist Drill Bit, DIN 338, 135° Split Point, 151mm Length

Engineered with a 135° split point, this 12.0 mm twist drill bit delivers self-centering precision and reduces walking on contact—ideal for accurate starts in tough materials. Crafted from HSS-Co5, it withstands high temperatures and maintains hardness in alloyed and unalloyed steel, stainless steel, cast iron, non-ferrous metals, and plastics.

Overview

The RUKO SPB-TX-DIN338-HSSCo-Ø12.0mm is a fully ground, right-hand cutting twist drill bit conforming to DIN 338. Its cylindrical straight shank fits standard drill chucks, while the bright surface finish reduces friction and improves chip evacuation. With an overall length of 151 mm and a working length of 101 mm, it offers a balanced reach for deep holes.

What stands out

• 5% cobalt alloy (HSS-Co5) for superior heat resistance and durability
• 135° split point eliminates center punching and improves accuracy
• Fully ground flutes ensure smooth cutting and precise hole dimensions
• h8 tolerance for consistent diameter and reduced run-out
• Versatile across steel, stainless steel, cast iron, non-ferrous metals, and plastics

Technical details

• Drill bit type: Twist drill bit
• Material: HSS-Co (High-Speed Steel with Cobalt)
• Diameter: 12.0 mm
• Standard: DIN 338
• Shank type: Cylindrical (straight shank)
• Point angle: 135°
• Point type: Split point (self-centering)
• Cobalt content: 5%
• Overall length: 151 mm
• Working length: 101 mm
• Tolerance: h8
• Manufacturing process: Fully ground
• Surface finish: Bright
• Cutting direction: Right-hand cutting
• Max material hardness: 1100 N/mm²
• Flute type: Standard spiral flute
• Packaging: Single piece

Our verdict

A professional-grade drill bit that excels in demanding applications. The cobalt alloy and split point make it a reliable choice for machinists and serious DIYers working with hard metals.