A heated wire through polystyrene, and the table decides the shapes
A hot wire cutter slices expanded and extruded polystyrene with a thin wire heated by electric current, and it is the tool behind cosplay armour, architectural models, terrain and packaging inserts. The format divides the shelf: a handheld bow for freehand shapes, a table with a vertical wire for straight and angled cuts, and hot knives with interchangeable tips for grooves and engraving. Cutting depth is the declared distance between the wire and its frame, and it limits the thickness of a block. Heat control matters because a wire too cold drags and a wire too hot melts a wide channel; a continuous dial is easier to tune than a fixed setting. Wire tension is kept by a spring or a screw, and replacement wire is a consumable sold by length. A table model is judged on its fence and angle guide, which is what makes repeated cuts identical. The power supply is a mains transformer or a battery, and the published voltage shows which it is. Cutting polystyrene releases fumes, so the ventilation the maker recommends applies, and the foams it lists — expanded, extruded, some polyurethane or not — are the ones it is meant for. We compare format, cutting depth, heat control, wire tension, table and fence, power supply and listed foams.
Hot knife, nickel-chromium blade · 200 W · up to 550 °C in 5–7 s · adjustable dial · spring safety switch · air cooling
A 200 W handheld hot knife with a nickel-chromium blade the listing says reaches 550 °C in 5 to 7 seconds, an adjustable heat dial, a spring safety switch and built-in air cooling.
Best for: Shaping EPS and XPS insulation or craft foam freehand, where a blade suits better than a wire.
≈ 80 €
Hot knife · four nickel-chromium blades, 2 × 20 cm and 2 × 15 cm · 0–600 °C in 5–8 s · air cooling · rest after 6 minutes · 220–240 V
A 200 W hot knife with four nickel-chromium blades of 15 and 20 cm, reaching 600 °C in 5 to 8 seconds, with air cooling and a maker’s recommendation to pause after six minutes of use.
Best for: Occasional freehand cuts in EPS, XPS and craft foam, in short sessions.
≈ 106 €
Hot wire table · Alu-Cobond work surface · template work possible · for polystyrene and rigid foam only · no power, depth or heat figures published
A benchtop hot wire cutter with an Alu-Cobond surface for sliding the workpiece, suited to template work and limited to polystyrene and thermoplastic materials, described in five short lines without a single figure.
Best for: A model maker cutting polystyrene sheets on the bench, who already knows the PROXXON range or will read its manual.
≈ £112 / 88 €
Hot knife with straight, bent and groove blades · 330 W · 15 steps up to 710 °C in 20 s · air cooling, 60 minutes then cool down · groove router · overheating protection and safety switch
A 330 W hot knife kit with fifteen heat steps up to 710 °C, straight, bent and groove blades and a groove router, which the maker limits to 60 minutes of use before cooling.
Best for: A prop builder or insulation fitter cutting, grooving and shaping EPS and XPS, who wants every blade type in one case.
≈ $100 / £95 / 100 €
Hot wire on a frame · cutting length up to 143 cm, height 30 cm · angles up to 90° vertical and 75° diagonal · 200 W · socket adapter included
A 200 W hot wire cutter on a frame with a cutting length of up to 143 cm and a height of 30 cm, adjustable to 90° vertically and 75° diagonally, for EPS insulation boards, XPS and similar foams.
Best for: An insulation installer or model maker cutting long EPS and XPS boards straight and at angles.
≈ 226 €
A price quoted in the text of a MakerVerdict page dates from the day that page was written; the live figure beside each product is fetched while you read and replaces it.
