RUKO HSS špirálový vrták 28,0 mm DIN 338 brúsený

With a 28.0 mm diameter and 178 mm flute length, this HSS twist drill bit delivers deep, accurate holes in steel, cast iron, non-ferrous metals and plastics.

Overview

The RUKO STB-HSS-SP-Gr.7-5-28,0mm is a high-speed steel twist drill bit manufactured to DIN 338. Its ground flutes and 118° point angle provide efficient chip removal and precise centring for general-purpose drilling in materials up to 900 N/mm² hardness.

What stands out

• Large 28.0 mm diameter for heavy-duty drilling
• Long 178 mm working length reaches deep workpieces
• Ground HSS construction for durability and sharpness
• Cylindrical shank fits standard drill chucks
• Right-hand cutting for conventional drilling machines

Technical details

• Material: High-Speed Steel (HSS)
• Drill bit type: Twist drill bit
• Standard: DIN 338
• Diameter: 28.0 mm
• Manufacturing process: Ground
• Point angle: 118°
• Shank type: Cylindrical
• Cutting direction: Right-hand cutting
• Surface finish: Bright
• Total length: 287 mm
• Working length (flute length): 178 mm
• Recommended material hardness: up to 900 N/mm²
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics
• Application: General purpose drilling
• Packaging quantity: 1 piece
• Tool holder compatibility: Drill chucks

Our verdict

A robust, large-diameter HSS drill bit for demanding workshop tasks. Its ground flutes and standard shank make it a reliable choice for professionals and serious DIYers.