The Walter 01A522 11\/32″ SST+ Drill Bit represents the pinnacle of drilling technology for industrial maintenance and fabrication. Engineered specifically for high-tensile materials, this bit utilizes a proprietary cobalt blend substrate that significantly outperforms standard High-Speed Steel (HSS) in heat resistance and wear characteristics. When drilling tough alloys like 304 or 316 stainless steel, heat generation is the primary cause of tool failure. The SST+ formulation maintains hardness at higher temperatures, preventing the cutting edge from softening and dulling prematurely.<\/p>\n
Structurally, the bit features a heavy-duty, fully ground body with a “High Flow” flute design. This geometry is critical for deep hole drilling as it accelerates chip evacuation. Efficient chip removal prevents packing and reduces friction, which in turn lowers the thermal load on the bit and the workpiece. The 135-degree split point is a key feature for precision work; unlike standard 118-degree points, the split point begins cutting immediately upon contact, eliminating the need for a center punch and preventing the bit from “walking” across the surface, even on curved substrates like pipes or tubing.<\/p>\n
To further enhance performance, Walter applies a specialized bronze SST surface treatment. This treatment not only provides a distinctive appearance but also reduces the coefficient of friction between the bit and the hole wall. This reduction in friction minimizes binding and allows for higher feed rates without compromising the integrity of the tool. Whether utilized in a rigid CNC setup, a stationary drill press, or a portable hand drill, the 01A522 delivers consistent, round, and burr-free holes in mild steel, stainless steel, and non-ferrous metals.<\/p>\n