01D555 - Walter SST+ 5.50mm Cobalt Drill Bit for Stainless Steel

Precision Engineering for Industrial Drilling

The Walter 5.50mm SST+ Drill Bit (01D555) represents the pinnacle of drilling technology for industrial maintenance and fabrication. Designed to address the common challenges faced when machining high-tensile materials, this bit utilizes a proprietary cobalt blend that significantly enhances hardness and thermal resistance. In high-throughput environments where tool failure leads to costly downtime, the SST+ series provides a reliable solution capable of withstanding the extreme temperatures generated when drilling stainless steel and other ferrous metals.

Central to its performance is the unique "high flow" flute design. This geometry is engineered to maximize chip evacuation rates, preventing the accumulation of debris that typically causes heat buildup and premature wear. By efficiently clearing the hole, the bit maintains a cooler cutting temperature, preserving the temper of the cutting edge for longer periods. Furthermore, the back tapered body design reduces the contact area between the bit and the sidewalls of the hole, virtually eliminating binding and reducing the torque load on the drilling machine. This feature is particularly beneficial when drilling deep holes or using portable equipment where stability can be a variable.

The surface of the 01D555 is treated with Walter's exclusive Bronze SST coating. This treatment acts as a solid lubricant, further reducing friction and facilitating smoother cutting action. Whether utilized in a stationary drill press for repetitive fabrication tasks or a portable hand drill for on-site maintenance, this 5.50mm bit delivers consistent, precise results. It is an essential component for professionals requiring exact metric sizing and uncompromising durability in their tooling inventory.