RUKO SPB-DIN338-HSS-G-risti-9,1mm kierreporanterä

The RUKO SPB-DIN338-HSS-G-Kreuz-9.1mm is a precision-ground twist drill bit with a cross-ground split point, engineered for accurate centring and reduced thrust. Unlike standard roll-forged bits, its ground flutes and 135° point angle deliver clean entry and consistent hole quality across a range of materials.

Highlights

• High-speed steel (HSS) construction for durability and heat resistance
• Ground (G) manufacturing per DIN 338 for precise geometry
• Cross-ground split point (Kreuz) minimises walking and improves self-centring
• 135° point angle suitable for general-purpose drilling
• Bright, uncoated surface for sharp cutting edges

In daily use

This 9.1 mm drill bit is ideal for creating accurate holes in steel, cast iron, non-ferrous metals, plastics, and wood. The split point design reduces the need for centre punching, while the standard helix angle ensures efficient chip evacuation. With a working length of 81 mm and an overall length of 125 mm, it fits most standard drill chucks and provides good reach for common drilling tasks.

Full specifications

• Drill bit type: Twist drill bit
• Material: High-speed steel (HSS)
• Manufacturing process: Ground (G)
• Standard: DIN 338
• Diameter: 9.1 mm
• Shank type: Cylindrical
• Point type: Split point (cross-ground)
• Point angle: 135°
• Helix angle: Standard (approx. 25-30°)
• Tolerance: h8
• Surface treatment: Bright / Uncoated
• Cutting direction: Right-hand cutting
• Overall length: 125 mm
• Working length (flute length): 81 mm
• Recommended materials: Steel, cast iron, non-ferrous metals, plastics, wood
• Max tensile strength (material): Up to 900 N/mm²
• Application: General purpose drilling
• Packaging quantity: 1 piece

Final note

RUKO's ground HSS twist drills offer a reliable balance of performance and value for workshop and industrial use.