Solid set of priorities. Rigidity and accuracy over speed is exactly the right tradeoff for hardwood, brass, and aluminum work on a hobby budget.
| Model | Price | Linear Rails | Ballscrew | Spindle | Work Area | Weight | Accuracy | Support |
|---|---|---|---|---|---|---|---|---|
| Genmitsu 4040 Pro | ~$800 | 15 mm | 1204 | 300W air | 400×400 mm | ~25 kg | ±0.05 mm | Amazon |
| FoxAlien 4040-XE | ~$1,100 | 15 mm | 1204 | 300W/1.5KW | 400×400 mm | ~30 kg | ±0.05 mm | 1-year |
| CNCEST 6040 | ~$1,200 | 16 mm supported | 1605 | 1.5KW water | 600×400 mm | ~55 kg | ±0.03 mm | None |
| ROCTECH RC0609 | ~$3,500+ | 25 mm HIWIN | Rack + ballscrew | 3.0KW HSD | 600×900 mm | ~1450 kg | ±0.02 mm | 24/7 global, ISO/CE/UL |
Machine price × 1.3–1.5 = actual cost to get running. You'll also need:
For aluminum and brass, machine weight is the best proxy for rigidity. A 25 kg desktop machine will chatter on aluminum at any depth of cut above 0.5 mm. A 55 kg 6040 can manage 1 mm DOC. A welded steel frame machine like the ROCTECH RC0609 at 1450 kg with Yaskawa servo motors and a welded structure is in a completely different league — it'll cut aluminum all day at 2–3 mm DOC and hold ±0.02 mm.
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