RUKO DIN 338 HSS-G špirálový vrták 21/64 palca (8,33 mm) krížové brúsenie

The RUKO SPB-DIN338-HSS-G-Kreuz-21/64 is a fully ground twist drill bit made from high-speed steel (HSS-G), designed for reliable drilling in steel, cast iron, non-ferrous metals, plastics, and wood. Its 135° split point ensures precise centering without wandering, while the bright finish reduces chip adhesion.

Highlights

• Diameter: 21/64 inch (8.33 mm) with h8 tolerance
• 135° split point for self-centering and reduced thrust
• Fully ground HSS-G for high cutting performance and heat resistance up to 400°C
• Right-hand cutting spiral with cylindrical shank
• Total length 117 mm, flute length 75 mm

In daily use

This bit excels in general-purpose drilling tasks where accurate hole placement matters. The split point eliminates the need for center punching in many materials, and the bright finish helps clear chips efficiently. The DIN 338 standard ensures consistent geometry and compatibility with standard drill chucks.

Full specifications

• Drill bit type: Twist drill bit
• Standard: DIN 338
• Material: High-speed steel (HSS-G)
• Manufacturing process: Fully ground
• Diameter: 21/64 inch (8.33 mm)
• Shank type: Cylindrical
• Point angle: 135°
• Point type: Split point (self-centering)
• Flute type: Right-hand cutting spiral
• Surface finish: Bright
• Tolerance: h8
• Total length: 117 mm
• Working length (flute length): 75 mm
• Recommended materials: Steel, cast iron, non-ferrous metals, plastics, wood
• Application: General purpose drilling
• Packaging: Single drill bit
• Drilling direction: Right-hand cut
• Heat resistance: Up to 400°C

Final note

Precision-ground for accuracy and long service life, the RUKO 21/64" HSS-G bit is a dependable choice for workshop and jobsite drilling.