RUKO SPB-DIN338 12.5mm Roll-Forged HSS Twist Drill Bit

Metalworkers and machine operators rely on the RUKO SPB-DIN338 12.5 mm twist drill bit for precise, repeatable holes in steel, cast iron, and non-ferrous metals. Its roll-forged HSS-R body and black oxide finish handle general-purpose drilling in workshops and on-site fabrication where a 12.5 mm hole is required.

Key specifications

• Drill bit type: Twist drill bit
• Diameter: 12.5 mm
• Material: High-speed steel (HSS-R)
• Manufacturing process: Roll-forged
• Standard: DIN 338
• Shank type: Cylindrical, 12.5 mm
• Point angle: 118°
• Cutting direction: Right-hand
• Surface finish: Black oxide
• Overall length: 151 mm
• Working length: 101 mm
• Tolerance: h8
• Heat resistance: Up to approx. 400°C

Why choose it

The DIN 338 geometry and h8 tolerance deliver consistent hole sizing, while the roll-forged HSS-R construction offers a balance of toughness and wear resistance for everyday drilling tasks. The black oxide finish reduces friction and helps shed chips during deep cuts.

Ideal use cases

• Drilling steel and cast iron components in maintenance and repair
• Creating holes in non-ferrous metals such as aluminium and brass
• General-purpose drilling in plastics and wood when a metal drill is on hand

Good to know

The 118° point angle suits a wide range of materials without re-sharpening for most workshop jobs. The cylindrical shank fits standard three-jaw chucks, and the 12.5 mm diameter is a common size for clearance holes and tapping preparations.