RUKO SPB-DIN338 12,8mm valssijyrsitty HSS-spiraalipora

Twist drill bit with 12.8 mm diameter, roll-forged from high-speed steel (HSS-R) to DIN 338. The black oxide surface reduces friction and improves chip evacuation in steel, cast iron, non-ferrous metals, plastics, and wood.

Advantages

Roll-forging aligns the steel's grain structure, giving the bit higher toughness and wear resistance than fully ground bits. The 118° point angle and standard spiral flute provide reliable centering and efficient material removal.

Suitable for

• General-purpose drilling in steel and cast iron
• Non-ferrous metals such as aluminium and brass
• Plastics and wood

Key specifications

• Diameter: 12.8 mm
• Total length: 151 mm
• Working length: 101 mm
• Shank: cylindrical, 12.8 mm
• Material: HSS-R (roll-forged high-speed steel)
• Point angle: 118°
• Surface treatment: black oxide
• Cutting direction: right-hand
• Tolerance: h8
• Standard: DIN 338

Recommendations

Use with a suitable drill chuck and cutting fluid when drilling steel to extend tool life.