01D545 - Walter SST+ 4.50mm Cobalt Blend Heavy Duty Drill Bit

High-Performance Metric Drilling Solution for MRO

The Walter 01D545 SST+ Drill Bit (4.50mm) represents the pinnacle of drilling technology for maintenance, repair, and operations environments where efficiency and tool longevity are paramount. Engineered by Walter Surface Technologies, the SST+ series is specifically formulated with a cobalt blend substrate. This metallurgical composition provides exceptional hot hardness, allowing the bit to maintain its cutting edge even under the high thermal loads generated when drilling tensile materials like stainless steel and hardened alloys.

Technically, the bit features a 135° split point geometry. Unlike standard 118° chisel points, this design is self-centering, eliminating the need for center punching and reducing the axial force required to initiate the cut. This is particularly advantageous in automated or stationary drilling setups where precision and cycle time are critical. The body of the bit utilizes a back-tapered design combined with a "High Flow" flute profile. This architecture significantly reduces friction along the margins of the hole and accelerates chip evacuation, preventing heat buildup that typically leads to premature tool failure.

The surface is treated with Walter’s proprietary Bronze SST coating, which further enhances lubricity and heat resistance. For industrial procurement managers and tool crib supervisors, the 01D545 offers a tangible return on investment by delivering more holes per bit and reducing the frequency of tool changes. It is an ideal choice for mixed-material workshops handling mild steel, aluminum, and stainless steel.