Round Nose Knives

In the high-speed world of concrete extrusion, the round-nose knife is the final arbiter of quality. A clean, defect-free separation at speeds of 150+ TPM requires more than just a sharp edge; it requires a blade precisely tuned to the specific mineralogy of your sand. At WELSCH, we offer four distinct series of round-nose knives engineered to maximize service life and eliminate the dreaded end-slump.

The ECO Series is our global bestseller, providing a high-performance engineering alternative to standard serial knives. Crafted from high-strength chrome-manganese steel and precision case-hardened, it delivers 170,000 to 220,000 cuts of reliable performance. The most cost-effective solution for river-sand mixes.

The SV3 Series is engineered for the world's most demanding production environments using highly abrasive, high-silica sands. Manufactured from high-alloyed Wolfram tool steel, through-hardened in a vacuum furnace to 60-64 HRC, achieving 280,000 to 350,000 cuts. While the initial investment is approximately 50% higher than the ECO series, the SV3 nearly doubles the maintenance interval.

The Vario Blade Series offers a sophisticated composite approach with a 3D-formed tool steel body paired with a fully hardened back blade. Featuring precision-slotted mounting holes, the blade can be pushed down as it wears, maintaining pallet-edge contact without replacing the entire assembly.

The TC Series uses a high-tensile carrier body armed with precision-brazed tungsten carbide segments along the entire cutting edge, providing diamond-class hardness for 24/7 operations. Specifically recommended for high-aesthetic lines where inductive heating is used and the cut must be surgically perfect, shift after shift.