Waterjet Cutting Cost Guide — What Drives Price

Machine Time

Waterjet shops typically charge $150–$300/hour depending on table size, pump pressure, and head count (single vs. multi-head). The primary cost driver is cutting speed, which is determined by material, thickness, and edge quality requirement. A part that takes 2 minutes to cut at $200/hour costs $6.67 in machine time. The same part at Q5 finish might take 6 minutes: $20.00.

Abrasive Consumption

Garnet abrasive is the second-largest cost. Consumption runs 0.5–1.5 lb/minute depending on orifice size and pressure. Garnet costs $0.15–0.30/lb in bulk. On a typical job, abrasive is 15–25% of total cost. Thicker material and harder material consume more abrasive per inch of cut. This is a variable cost that laser and plasma don't have.

Material Cost

Waterjet shops buy plate stock and charge per part based on the nested rectangle that contains your geometry plus material markup (15–30%). Irregular shapes waste more material. Standard plate thicknesses are cheaper than odd sizes. Providing your own material can save 15–20% but introduces logistics and quality control complexity.

Nesting & Setup

Programming and nesting: $50–$150 per nest (amortized across parts). Fixturing for stack cutting or unusual setups: $100–$500. Machine setup: 15–30 minutes typical ($50–$100). These are fixed costs per job — they matter on small runs and become negligible on large orders. Send DXF or DWG files to minimize programming time.

Quality Level Impact

Q1 separation cut: 1x cost baseline (fastest). Q3 production cut: 1.5–2x cost (standard). Q5 finish cut: 3–4x cost (slowest). Most parts only need Q5 finish on mating or cosmetic edges. Specify different quality levels for different edges on the same part to optimize cost — fast cuts on non-critical edges, slow cuts where it matters.

Thickness Economics

0.125" aluminum: ~$1–3/linear foot of cut. 0.500" steel: ~$3–8/linear foot. 1" steel: ~$8–15/linear foot. 4" steel: ~$30–60/linear foot. Cost per foot of cut increases roughly linearly with thickness (more time + more abrasive). At some thickness, waterjet is the only option — laser can't cut it and plasma quality is insufficient.