Bosch HSS-G Twist Drill Bit 12 mm x 151 mm

This 1-piece Bosch HSS-G twist drill bit (12 mm × 151 mm) is a high-speed steel accessory engineered for standard boring tasks. The twist drill bit format remains a staple in machining, designed to remove material efficiently as it rotates. Its high-speed steel construction allows the tool to withstand elevated temperatures caused by friction during continuous metalwork. Users rely on this type of ground tooling to produce straight, consistent holes in solid workpieces. The HSS-G designation indicates a fully ground profile, which provides good positional accuracy and consistent performance across repetitive tasks.

Matching the accessory to the correct workpiece is essential for maintaining tool longevity and achieving clean results. This bit is rated for alloyed steel, non-alloyed steel, iron, and cast iron. Hard plastics are also supported, giving the operator flexibility across different materials. The bit works in both handheld rotary tools and stationary drill presses. Its bare stainless steel finish makes it easy to inspect the flutes for wear or debris between jobs.

• 12 mm cutting diameter provides a substantial bore size for structural fabrication and heavy-duty mechanical fixings.
• 151 mm overall length fits standard drill chucks and provides extended reach into recessed areas.
• 101 mm working length sets the maximum depth of a single hole before the tool must be fully extracted.
• 135° point angle engages flat metallic surfaces, ensuring a quick start to the cut.
• Split-point tip geometry prevents wandering on initial contact and removes the need for centre punching.