Twist Drill Bits Bosch 2608595056 HSS Ground 5-10mm

HSS Twist Drill Bits Bosch 2608595056 HSS Ground 5-10mm are precision ground high-speed steel (HSS) twist drills designed for accurate metal and wood drilling. Manufactured to DIN 338 as Type N with a 135° self-centring split-point tip, these bits combine active cutting and precise centring to prevent wandering. The cylindrical shank equals the drill diameter and the h8 tolerance ensures consistent fit for use in drill stands and drill drivers. The ground geometry provides up to 40% faster drilling and up to 50% lower feed pressure compared with standard-ground HSS bits with chisel edges.

Advantages

The 135° split-point tip eliminates the need for centre-punching or pilot drilling up to 10 mm, reducing setup time and improving accuracy. Precision grinding reduces required feed pressure and increases drilling speed for a cleaner, more consistent hole. Made of HSS, the bits offer high wear resistance and durability across alloyed and non-alloyed steels, cast materials, non-ferrous metals and hard plastics. Standard DIN 338 manufacturing and h8 diameter tolerance ensure interchangeability and predictable performance in drill stands and hand-held drill drivers.

Suitable for

• Drilling holes in alloyed and non-alloyed steel
• Working with cast steel, cast iron and sintered iron
• Drilling non-ferrous metals (aluminium, copper, brass)
• Creating holes in hard plastics
• Use in drill stands and hand-held drill drivers

Key specifications

• Brand: Bosch
• Manufacturer part number (MPN): 2608595056
• EAN: 3165140290562
• Material: High-speed steel (HSS)
• Type: Twist drill, precision ground, Type N (flute angle)
• Tip angle: 135° split-point (self-centring)
• Diameter range: 5–10 mm
• Shank: cylindrical, shank diameter equals drill diameter
• Standard: DIN 338
• Diameter tolerance: h8

How to use

Select the appropriate drill diameter for the hole required and secure the workpiece. Fit the drill bit into the chuck so the cylindrical shank seats fully, and tighten the chuck according to the drill manufacturer's instructions. Use appropriate cutting speed and lubrication for the material being drilled: lower speeds and cutting fluid for hard or alloyed steels, higher speeds for non-ferrous metals and plastics. Begin drilling with steady feed; the 135° split-point tip will self-centre and reduce the need for pilot holes up to 10 mm. Withdraw periodically to clear chips and maintain cooling.

Recommendations

Wear appropriate personal protective equipment (safety glasses, gloves where applicable) and follow the drill and workshop safety guidelines. Use cutting fluid for steel and alloyed materials to extend bit life. Replace bits that show wear, chipping or blunting to maintain drilling accuracy and safety.