Abrasive Waterjet Cutting Speed & Cost Calculator
Abrasive waterjet machining relies on a supersonic slurry of high-pressure water (up to 94,000 PSI) and abrasive garnet (80 or 120 mesh). Cutting feed rate directly dictates edge taper, striation depth, and edge quality class (Q1 through Q5). Calculate accurate cutting feeds, abrasive consumption, and run costs for your DXF vector toolpaths.
| Class | Speed (mm/min) | Time (min) |
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Unlike lasers, abrasive waterjet streams create significant jet lag (trailback) and stream deflection. Sharp internal corners require automatic tool deceleration or corner radius fillets (minimum 0.5–1.0mm) to prevent internal corner blowout. Ensure all DXF cutting contours are 100% continuous, closed polyline loops with tangent arcs rather than dense polyline facet segments.
Understanding Waterjet Edge Quality Classes (Q1 to Q5)
The International Waterjet Technology Association defines 5 distinct cut surface finishes based on cutting speed relative to maximum separation speed:
- Q1 (Separation Cut - 100% Speed): Coarse striations along bottom 50% of cut. Severe taper (2°–4°). Ideal for rough sizing, scrap separation, or blanks receiving heavy secondary CNC milling.
- Q2 (Through Cut - ~65% Speed): Striations visible on bottom 30%. Moderate taper. Suitable for weld prep, construction brackets, and non-cosmetic industrial parts.
- Q3 (Standard Commercial - ~45% Speed): Clean top 70% with very minor striations at the bottom. Standard balance of machining economy and precision for architectural and machine parts.
- Q4 (High Quality - ~28% Speed): Virtually no striations, excellent perpendicularity, minimal taper (< 0.5°). Required for close-tolerance sheet metal assembly and precision gears.
- Q5 (Tooling / Mirror Grade - ~17% Speed): Perfectly smooth, vertical edge across 100% of material thickness. Zero detectable striations. Used for finished tooling dies, gauge blocks, and glass artwork.