RUKO HSS-G Twist Drill Bit 10.3 mm DIN 338 Split Point

Precision-ground HSS-G twist drill bit with a 10.3 mm diameter and 135° split point for self-centering starts in metal, plastic, and wood.

Overview

The RUKO SPB-DIN338-HSS-G-Kreuz-10,3mm is a fully ground, bright-finished twist drill bit made from high-speed steel (HSS-G). It conforms to DIN 338, the standard for short series twist drills with cylindrical shank, and features a split point (Kreuzanschliff) for excellent centering and reduced thrust. The 135° point angle and type N helix make it suitable for general-purpose drilling in a wide range of materials.

What stands out

• Split point geometry eliminates walking and enables precise hole positioning without center punching.
• Fully ground flutes and h8 tolerance ensure accurate hole diameters and smooth chip evacuation.
• Bright, uncoated surface reduces friction and heat buildup in common steels and non-ferrous metals.
• DIN 338 compliance guarantees consistent dimensions and compatibility with standard drill chucks.

Technical details

• Diameter: 10.3 mm
• Overall length: 133 mm
• Working length: 87 mm
• Shank type: Cylindrical, diameter 10.3 mm
• Point angle: 135°
• Helix angle: Type N (standard)
• Material: HSS-G (high-speed steel, ground)
• Surface finish: Bright / uncoated
• Tolerance: h8
• Manufacturing process: Fully ground
• Standard: DIN 338

Our verdict

A dependable, precision-ground twist drill bit for workshops and demanding DIY tasks. The split point and DIN 338 geometry deliver accurate, clean holes in steel, cast iron, non-ferrous metals, plastics, and wood.