Makita HSS-Co Metal Drill Bit 3.0 x 61 millimeters (D-17310)

This single-piece Makita HSS-Co metal drill bit, 3.0 × 61 mm (D-17310), handles heavy metalworking applications. The core is made from M35 high-speed steel with a 5% cobalt blend, which improves wear resistance and helps the cutting edge tolerate the heat produced by heavy friction. It is rated for drilling stainless steel, hard metal alloys, and low-carbon steel. Fabricators use it for maintenance and repair work where standard carbon-steel bits wear out too quickly.

The bit runs in a standard power drill. Its cutting geometry is designed for accurate, controlled hole-making in dense, unforgiving materials. The shank has enough rigidity to keep the hole straight under continuous pressure on the workpiece. Users working on alloy materials get a consistent cut. The shank fits a standard three-jaw chuck directly, with no special adaptor needed.

• 3.0 mm drilling diameter for accurate pilot holes or clearance for small fasteners.
• 61 mm overall length, giving adequate clearance between the drill and the workpiece.
• 33 mm working length, setting the maximum material depth the bit can penetrate.
• 118° point angle to reduce wandering at the start of the cut and keep alignment.
• Cylindrical shank, compatible with common keyed and keyless drill chucks.