RUKO KEB-HSS Mod.55 Twist Drill Bit 21.0 mm DIN 338

The RUKO KEB-HSS Mod.55 is a precision-ground twist drill bit with a 21.0 mm diameter, built for reliable general-purpose drilling in steel, cast iron, non-ferrous metals, and plastics. Its HSS construction and DIN 338 geometry deliver consistent performance in workshop and industrial use.

Highlights

• High-speed steel (HSS) for durability
• 21.0 mm diameter with h8 tolerance
• 118° point angle for accurate starts
• Right-hand cutting direction
• Bright surface finish

In daily use

The cylindrical shank fits standard drill chucks, and the 135 mm flute length clears chips efficiently. The standard helix angle (Type N) suits a wide range of materials, making this bit a versatile choice for metalworking and maintenance tasks.

Full specifications

• Material: High-Speed Steel (HSS)
• Drill bit type: Twist drill bit
• Diameter: 21.0 mm
• Standard: DIN 338
• Shank type: Cylindrical shank
• Point angle: 118°
• Cutting direction: Right-hand cut
• Surface finish: Bright
• Total length: 205 mm
• Flute length: 135 mm
• Diameter tolerance: h8
• Application: General purpose drilling
• Suitable materials: Steel, cast iron, non-ferrous metals, plastics
• Manufacturing process: Ground
• Series: Mod.55
• Packaging quantity: 1 piece
• Tip type: Standard point
• Helix angle: Standard (Type N)

Final note

A dependable 21 mm HSS twist drill bit for everyday drilling tasks across common materials.