RUKO SPB-DIN345-59.0mm-HSS Morse Taper Shank Twist Drill Bit 59 mm MT5 Cobalt

Drilling large-diameter holes in tough steel or cast iron demands a bit that resists heat, stays sharp, and clears chips without jamming. The RUKO SPB-DIN345-59.0mm-HSS twist drill answers that call with a 5% cobalt high-speed steel body, Morse taper shank, and a fully ground DIN 345 profile.

Who is it for

Industrial machinists and maintenance crews who bore precise, large holes in alloyed and unalloyed steel, cast iron, non-ferrous metals, plastics, and materials up to 1100 N/mm² tensile strength. The MT5 taper fits heavy-duty drilling machines and lathes.

Main features

• 59.0 mm diameter twist drill with Morse taper shank MT5 for secure, high-torque mounting.
• HSS-E-Co 5 cobalt alloy withstands high heat and resists wear in demanding cuts.
• Fully ground flutes and 130° point angle deliver clean entry and efficient chip evacuation.
• Right-hand cutting direction with h8 tolerance for consistent hole sizing.
• Bright finish reduces friction and helps chips slide away from the cutting edge.

Specifications

• Drill bit type: Twist drill
• Shank type: Morse taper shank MT5
• Standard: DIN 345
• Material: HSS-E-Co 5 (5% cobalt high-speed steel)
• Drill diameter: 59.0 mm
• Overall length: 430 mm
• Flute length: 250 mm
• Point angle: 130°
• Cutting direction: Right-hand
• Tolerance: h8
• Manufacturing method: Fully ground
• Surface treatment: Bright finish
• Suitable materials: Alloyed and unalloyed steel, cast iron, non-ferrous metals, plastics, materials up to 1100 N/mm² tensile strength

Tips

Use a suitable cutting fluid to extend tool life when drilling steel. Ensure the Morse taper socket is clean and dry before mounting to prevent slippage. For deep holes, withdraw the bit periodically to clear chips and reduce heat buildup.