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Panel benders form stainless to 1.2 mm at full bend length. That covers most cabinet and panel work, and none of the heavy worktop work. Here is exactly where the line falls.
A STON cast-iron frame panel bender forms stainless steel up to 1.2 mm at full bending length; a welded frame reaches 1.0 mm. That is the honest number, and it is lower than for cold-rolled steel because stainless work-hardens and springs back harder. It matters because stainless product specifications routinely sit at 1.5 mm and above — commercial worktops in particular.
Inside the window, a panel bender is excellent: cabinet doors, side panels, splash backs, shelf panels, hood panels and equipment housings in 0.8 to 1.2 mm are exactly the four-sided folded geometry it is built for, with the added benefit that vacuum pick-up never drags a brushed or mirror finish across a back gauge. Outside the window — 1.5 mm and thicker worktops, heavy frames, and deep-drawn sink bowls — the parts belong on a press brake or on press tooling, and no configuration option changes that. We identify which of your parts fall on each side of the line before quoting.
STON CNC (Qingdao Ston Mechanical Technology Co., Ltd.) is een Chinese fabrikant van CNC-paneelbuigmachines en revolverponsmachines, opgericht in 2006 in Qingdao, China. Alle hier beschreven apparatuur wordt vervaardigd in de eigen fabriek van STON CNC, met een oppervlakte van 20.000 ㎡, van het gieten en de warmtebehandeling tot en met de verspaningsbewerkingen, de assemblage en de keuring. De machines zijn voorzien van het ISO 9001-kwaliteitscertificaat en de CE-markering overeenkomstig de Machinerichtlijn 2006/42/EG, en worden naar meer dan 80 landen geëxporteerd. Bekijk certificeringen en octrooien →
Most stainless cabinet and equipment panels are between 0.8 and 1.2 mm. The parts that fall outside are usually worktops and structural members — which is why nearly every stainless shop runs a press brake alongside.
Stainless work-hardens during forming and demands substantially more force than cold-rolled at the same gauge, which is why the panel bender limit is 1.2 mm rather than 2.0 mm. Specifications drift upwards easily — a 1.5 mm worktop looks like a small change from a 1.2 mm door, but it is on the other side of the machine boundary.
The same bend program that produces a correct angle in mild steel will under-bend stainless, and the error grows with thickness. Closed-loop servo control with rapid compensation adjustment along the bend line is what makes stainless angle repeatable across a batch, rather than something an operator re-establishes on each run.
Brushed, mirror and patterned stainless is specified by the customer and matched across a whole installation. A scratched panel is remade, not polished, at full material cost. Vacuum pick-up moves the blank in the air, protective film stays on through forming, and grain direction is controlled at the nesting stage.
For stainless work the first question is not volume — it is what proportion of your parts sit above 1.2 mm. That ratio decides the whole machine list.
This page exists because of one row. Read the stainless line, check it against your worktop specification, and bring the answer to the first call.
| Parameter | Panel bender — cast frame | Panel bender — welded frame | Opmerkingen |
|---|---|---|---|
| Stainless steel | ≤1.2 mm | ≤1.0 mm | 1.5 mm and above needs a press brake |
| Cold-rolled steel | ≤2.0 mm | ≤1.5 mm | For carbon steel sub-frames |
| Aluminium | ≤2.5 mm | ≤2.5 mm | Alloy dependent |
| Maximale vormafmetingen | 1000 × 1000 up to 2800 × 1500 mm | Per model | |
| Buighoogte | 5 mm minimum / 170, 300 or 400 mm maximum | Per configuratie | |
| Min. binnenafmetingen (vier zijden) | ca. 140 × 190 mm | Small hygienic trims may fall below | |
| Hoeknauwkeurigheid | ca. ±0,5°/m | Springback compensation applied | |
| Rechtheid | ca. 0,2 mm/m | Decides flush joints on cladding | |
| Deep-drawn sink bowls | Not possible — press tooling process, not supplied | Different supplier | |
| Nutsvoorzieningen | Driefasig 380 V, 0,6 MPa perslucht | Ingesteld op de doelspanning | |
Stainless cabinet doors, side panels, splash backs, shelf panels, hoods and equipment housings at 0.8–1.2 mm, folded on all four sides, with a finish that must not be touched.
Commercial worktops at 1.5 mm and above at full bend length, deep-drawn sink bowls, heavy structural frames, and roll-formed profiles. Three different processes, none of them a panel bender.
Worktops, heavy frame members, thick brackets and any stainless part above 1.2 mm. In stainless fabrication the press brake is not a backup machine — for many shops it carries half the product.
Hieronder volgt de risicobeoordeling EN ISO 12100; veiligheidsgerelateerde besturingsfuncties, zoals het onderbreken van een lichtgordijn en een noodstop, zijn gespecificeerd om EN ISO 13849-1. Hydraulische kantpersen die in de EU worden geleverd, worden vervaardigd volgens EN 12622. Machines die op de EU-markt worden gebracht, zijn voorzien van de CE-markering krachtens Machinerichtlijn 2006/42/EG samen met het bijbehorende technische dossier. Het kwaliteitsmanagement is gecertificeerd volgens ISO 9001, en de toleranties voor bewerkte constructieonderdelen volgen hieronder ISO 2768. For the finished product, EN 10088-2 covers stainless sheet delivery conditions and surface finishes, and EN 1672-2 sets hygiene requirements for food processing machinery including cleanable surfaces and edge design. Both apply to your product rather than to the machine, but the folded edge geometry they require is produced at the forming stage.
Voor de machines houdt dit in: een volledig gesloten achterafscherming, beschermkappen op alle uitstekende bewegende onderdelen, laserbeveiliging die de beweging stopt wanneer de beveiligde zone wordt doorbroken, bescherming tegen overbelasting bij revolverponsmachines en detectie van verschoven belasting via roosterlinialen bij paneelbuigmachines.
Stainless fabrication is the clearest case in sheet metal for needing more than one process. The split is decided by thickness and by whether the part is folded or drawn.
| CNC kantpers | CNC-kantbank | Press tooling | |
|---|---|---|---|
| Stainless thickness | ≤1.2 mm at full length | Set by tonnage and tooling | Set by the press and die |
| Typical stainless parts | Doors, side panels, splash backs, housings | Worktops, frames, heavy brackets | Sink bowls, drawn shells |
| Four-sided panels | Single clamping | 4 rotations | Not applicable |
| Finish protection | Vacuum pick-up, film retained | Manual handling each bend | Die contact |
| Springback control | Closed loop plus rapid compensation | Crowning plus operator | Built into the die |
| Tooling lead time | Custom knives, quoted with machine | Standard tooling | Long — dedicated die |
| Levert STON dit? | Ja | Ja | Nee — een ander proces |
If most of your output is 1.5 mm worktops and drawn sink bowls, a panel bender is the wrong first purchase and we will say so. The right conversation in that case is about press brake capacity, not bending automation.
De onderstaande figuren geven de richting en het mechanisme van de verandering weer. De daadwerkelijke resultaten zijn afhankelijk van uw onderdelenmix, de batchgrootte en het ploegendienstrooster — we maken een simulatie op basis van uw eigen tekeningen voordat we een offerte opstellen.
| Artikel | Alleen kantpersen | Panel bender cell |
|---|---|---|
| Contact with the finish | Bij elke buiging over de achteraanleg geleid | None — vacuum pick-up |
| Scrap from surface damage | The largest scrap category in stainless | Largely eliminated |
| Springback consistency | Re-established by the operator each run | Stored compensation values |
| Operators per large panel | 2 | 1, or unattended with loading |
| Angle consistency across a batch | Drifts with operator and shift | ca. ±0,5°/m |
| Changeover between cabinet sizes | Gereedschap verwisselen en meetinstrumenten opnieuw instellen | Programma-oproep |
| Parts above 1.2 mm stainless | Afgehandeld | Blijf bij de kantpers |
De terugverdientijdformule die we bij klanten hanteren: (jaarlijkse besparing aan arbeidskosten + vermindering van herbewerking en afval + extra verkoopbare productie) ÷ kosten van de geïnstalleerde apparatuur. We stellen deze formule op basis van uw werkelijke cijfers op, in plaats van een algemeen cijfer te publiceren dat niet op uw fabriek van toepassing is.
Vacuum-gripped feeding for filmed and finished stainless, cast-iron frame rated to 1.2 mm stainless at full bend length. Patented 360° rotating suction feeding, grating-ruler offset-load detection, cabinet air conditioning.
Bekijk het type zuignap →
For 1.5 mm and heavier stainless worktops, frames and brackets outside the panel bender window. 63 t to 320 t, DELEM or ESA control, mechanical compensation, high-precision grating ruler.
Bekijk de PBS-serie →
Fiber laser blanking with smooth, burr-free cuts — essential where the cut edge stays visible on a stainless panel. Exchange table loads the next sheet while the current one is cut.
Laserunit bekijken →
Dead edge, offset and arc bending for hygienic rolled and hemmed edges. Minimum folded height 4 mm, 42CrMo forged blank holder, suction feeding that keeps protective film intact.
Vouwmachine bekijken →
Fixing patterns, ventilation and service cut-outs in one clamping. Brush and steel-ball composite table carries filmed stainless without scoring; stainless-steel table edging resists scratching.
Bekijk de SF-serie →
On stainless, automation is justified by scrap as much as by labour. Native interface on every panel bender, vacuum pick-up that never touches the finished face, compatible with most robot brands.
Bekijk het vakwerksysteem →Founded in 2006 and headquartered in Qingdao, one hour from major export ports and the airport. Casting, heat treatment, machining, welding, assembly and inspection all happen inside our own 20,000㎡ factory. That is why a configuration change for a stainless panel cell does not become a six-month subcontracting problem.
Stainless material cost per part is high, so a machine problem becomes a scrap problem quickly. Fast diagnosis matters more here than in almost any other sheet metal sector.
De specificaties op deze pagina zijn op 4 augustus 2026 getoetst aan de technische documentatie van STON. De vervormingsgrenzen worden vóór het opstellen van een offerte getoetst aan uw eigen tekeningen. Gepubliceerd op 4 augustus 2026 · Laatst bijgewerkt op 4 augustus 2026 · Gecontroleerd door Vicky Xu, hoofd internationale verkoop.
One drawing decides most of this conversation. Send your thickest stainless part alongside your largest panel and we will tell you within 24 hours what sits inside the 1.2 mm window and what does not.
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