RUKO DOB-HSS-4,9mm blanke spiraalboor DIN 338

Precision-ground 4.9 mm HSS jobber drill bit with a bright finish, DIN 338 geometry and h8 tolerance for accurate holes in steel, cast iron, non-ferrous metals and plastics.

Overview

The RUKO DOB-HSS-4.9mm-blank is a general-purpose twist drill bit manufactured from high-speed steel (HSS). Its cylindrical straight shank fits standard three-jaw chucks, and the 118° point angle provides a balanced combination of centering accuracy and cutting performance. The bright finish reduces chip adhesion and friction during drilling.

What stands out

• DIN 338 jobber length: 86 mm total, 52 mm flute length – ideal for handheld drills and drill presses.
• h8 diameter tolerance ensures consistent hole size.
• Right-hand cutting direction for conventional drilling.
• Two flutes for efficient chip evacuation.

Technical details

• Drill bit type: Twist drill bit (jobber)
• Material: High-speed steel (HSS)
• Diameter: 4.9 mm
• Shank type: Cylindrical (straight shank)
• Point angle: 118°
• Standard: DIN 338
• Finish: Bright
• Cutting direction: Right hand cut
• Tolerance: h8
• Total length: 86 mm
• Flute length: 52 mm
• Number of flutes: 2
• Application: General purpose drilling
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics
• Recommended use: Handheld drills, drill presses
• Coolant through: No
• Packaging: Single unit

Our verdict

A dependable DIN 338 HSS twist drill bit for everyday metal and plastic drilling tasks. Its bright finish and h8 tolerance deliver clean, accurate holes with standard drilling equipment.