Twist Drill Bits Bosch HSS Cobalt 2608585885 5 Piece Set

Twist Drill Bits Bosch HSS Cobalt 2608585885 5 Piece Set is a set of five HSS cobalt twist drill bits manufactured to DIN 338. The bits feature 5% cobalt alloy in fully ground high-speed steel for improved wear resistance and heat protection, a split-point tip with a 135° angle for accurate centring, and a cylindrical shank matching the drill diameter. They are suitable for use in drill stands and hand-held drill drivers and are intended for drilling a variety of steels and other ferrous materials.

Advantages

The cobalt alloy (5%) and fully ground HSS construction provide extended tool life, better surface finish and enhanced resistance to heat and wear. Two cutters and two flutes ensure efficient chip removal, reducing clogging and maintaining cutting performance. The split-point 135° tip reduces walking at the start of drilling and improves centring, while the h8 diameter tolerance meets precision requirements for many metalworking tasks.

Suitable for

• Alloyed and non-alloyed steels
• Stainless steel and acid- or heat-resistant steels
• Cast iron and cast steel
• General metalworking and maintenance drilling tasks

Key specifications

• Brand: Bosch
• Manufacturer part number (MPN): 2608585885
• EAN: 3165140521208
• Type: HSS cobalt twist drill bits, Type N (flute angle)
• Cobalt content: 5%
• Tip: Split-point, 135°
• Shank: Cylindrical (shank diameter equals drill diameter)
• Standard: DIN 338
• Diameter tolerance: h8
• Set: 5 pieces (various sizes included)

How to use

Secure the required drill bit in the chuck of a drill driver or drill stand so the cylindrical shank is fully clamped. Select a suitable cutting speed and feed for the material being drilled; lower speeds are recommended for stainless and heat-resistant steels to avoid overheating. Use cutting lubricant when drilling stainless steel or other difficult alloys to improve chip evacuation and reduce wear. Apply steady, moderate pressure and allow the bit to do the cutting; withdraw periodically to clear chips when drilling deep holes.

Recommendations

For best results when drilling stainless or heat-resistant steels, use a cutting lubricant, maintain lower spindle speeds, and avoid excessive pressure. Replace worn bits to preserve hole quality and safety. Store the set in a dry place to prevent corrosion of the tool surfaces.