RUKO LOS-HSS-G38.0mm Ground Twist Drill Bit, HSS, DIN 338, 38 mm Diameter, 280 mm Length

In metalworking shops and maintenance departments, machinists need large-diameter holes with precise tolerances. The RUKO LOS-HSS-G38.0mm twist drill bit delivers exactly that. Ground from high-speed steel to DIN 338, it produces clean, accurate 38 mm holes in steel, cast iron, non-ferrous metals, plastics, and wood. The reduced cylindrical shank fits standard drill chucks, and the 118° point angle starts cuts quickly without walking.

Key specifications

• Drill bit type: Twist drill bit
• Material: High-speed steel (HSS)
• Manufacturing process: Ground
• Diameter: 38.0 mm
• Standard: DIN 338
• Shank type: Reduced cylindrical shank
• Shank diameter: 13 mm
• Point angle: 118°
• Flute type: Spiral flute
• Cutting direction: Right-hand cut
• Surface finish: Bright / uncoated
• Tolerance: h8
• Total length: 280 mm
• Working length (flute length): 180 mm

Why choose it

Precision-ground flutes ensure excellent chip evacuation and high dimensional accuracy. The hardened and tempered HSS body resists wear, giving long service life even in tough materials. The reduced shank allows use in machines with smaller chuck capacities, making this bit versatile across drill presses and hand drills.

Ideal use cases

• Drilling large holes in steel plates and structural sections
• Creating clearance holes in cast iron machine parts
• Boring holes in non-ferrous metals like aluminium and brass
• Working with plastics and wood when a clean, accurate hole is required

Good to know

For best results, use cutting fluid when drilling steel and cast iron. The bright finish provides corrosion resistance in normal storage conditions. The DIN 338 standard guarantees consistent geometry and performance.