RUKO SPB-DIN338 8.25 mm HSS-Co Twist Drill Bit

Precision drilling in tough materials demands a bit that stays sharp, centers accurately, and endures heat. The RUKO SPB-DIN338 8.25 mm HSS-Co twist drill bit meets that challenge with a cobalt-alloyed high-speed steel body and a self-centering split point, making it a dependable choice for professional workshops and demanding DIY projects.

Who is it for

This bit is built for machinists, metalworkers, and serious fabricators who regularly drill alloyed or unalloyed steel, stainless steel, cast iron, and non-ferrous metals. It also handles plastics with ease, providing a single solution for mixed-material jobs.

Main features

• 5% cobalt HSS-Co construction for high heat resistance and durability
• 135° split point grind for self-centering and reduced walking
• Fully ground flutes with bright finish for efficient chip evacuation
• DIN 338 dimensional standard with h8 shank tolerance for precise fit
• Right-hand cutting direction for standard drilling operations

Specifications

• Drill bit type: Twist drill bit
• Diameter: 8.25 mm
• Overall length: 117 mm
• Working length: 75 mm
• Shank type: Cylindrical
• Point angle: 135°
• Point grind: Split point
• Material: HSS-Co (5% cobalt)
• Surface finish: Bright
• Tolerance: h8
• Cutting direction: Right-hand
• Manufacturing process: Fully ground
• Max tensile strength of material: 1100 N/mm²
• Packaging quantity: 1 piece

Tips

Use a cutting fluid when drilling stainless steel or high-strength alloys to extend bit life. For best results, start with a center punch or pilot hole if your workpiece is prone to wandering.