01H129 - Walter SST+ 29/64-Inch Hex Shank Stub Drill Bit for Sheet Metal

Precision Drilling with Walter SST+ Technology

The Walter 01H129 29/64" Hex SST Stub Drill is a premium cutting tool engineered for industrial professionals who demand reliability and precision. Part of Walter's renowned SST+ line, this drill bit is specifically designed to address the common challenges associated with drilling thin-walled materials and sheet metal. The core of its performance lies in its robust High-Speed Steel (HSS) construction, enhanced by a proprietary bronze SST surface treatment. This specialized coating significantly reduces the coefficient of friction between the tool and the workpiece, facilitating smoother chip evacuation and minimizing heat generation—the primary cause of premature tool failure.

One of the standout features of this model is its stub length geometry. Unlike jobber length drills, stub drills feature a shorter flute and overall length, which provides superior rigidity. This increased stiffness is critical when applying high feed pressure or when working with hard materials, as it virtually eliminates the flexing and bowing that leads to bit breakage. For maintenance, repair, and operations (MRO) environments, this durability translates to lower consumable costs and less downtime replacing broken tools. The compact size also makes it an indispensable asset for drilling in confined spaces, such as inside electrical cabinets, automotive chassis, or complex machinery where standard length bits simply cannot fit.

Efficiency is further maximized by the 135° split point geometry. This aggressive tip design allows the drill to bite into the material immediately upon contact, effectively eliminating the "walking" or skating phenomenon often experienced with standard 118° points. As a result, users can achieve precise hole placement without the extra step of center punching, saving valuable time during high-volume fabrication tasks. The inclusion of a hex shank is a modern adaptation that caters to the versatility required in today's workshops; it ensures a positive, slip-free drive in standard three-jaw chucks and offers seamless compatibility with quick-change adapters and impact drivers. Whether working with mild steel, stainless steel, or non-ferrous metals, the Walter 01H129 delivers consistent, burr-free performance.