Steam Bending Service for Custom Bent Wood Parts
Full steam-bending service from drawing review through tooling, bending, drying and finishing. Timber is conditioned to 20–25% moisture for plasticisation, then steamed about 15 minutes per centimetre of thickness before forming.
Our steam bending service bends solid wood and laminated plywood to your drawings for furniture, lighting and interior programmes — from one-off prototypes to repeat production supply.
How steam bending works
1. Selection and conditioning
Not every board bends. Timber is selected for species, grain slope and moisture content, then conditioned — usually in a kiln — to the moisture range where it will plasticise reliably. Too dry and it breaks; too wet and it will not hold the new shape.
2. Steaming
The blank enters a steam chamber. Time depends on species and thickness: a thin ash slat might need under an hour, a thick beech section considerably longer. The target is uniform temperature through the whole cross-section — heat the outside and leave the core cold, and the piece splits at the core when you bend it.
3. Bending
The pliable blank is removed and bent into the form while still hot. The form is built to the exact curve of the finished part, usually with a steel strap on the outside of the bend to stop the tension face stretching and tearing. The window between “too cold to bend” and “too cold to hold the shape” is short — this is where a bender’s experience shows.
4. Drying in the form
The part stays clamped while it cools and dries back to working moisture content. Rushing this step produces spring-back: the part relaxes toward straightness once released. Gradual, controlled drying is what locks the geometry, and it is the step that cannot be compressed when a supplier promises an impossible lead time.
5. Finishing
Once stable, the part is machined to final dimensions — CNC cutting, drilling, sanding — and finished to the specified surface. We follow the bending principle Michael Thonet industrialised, refined over 25 years of production.
What we bend
- Chair frames, chair backs and arms
- Seat and back slats, table aprons and edge bands
- Lighting components — shade frames, rings and bases
- Arch components, panels and interior elements
Materials and their bending behaviour
| Ash | Elastic; reaches tight radii; the default for slender, load-bearing parts |
| Beech | Fine and even; bends to small radii; the classic bending species |
| Birch plywood | Laminated; reaches compound curves; most stable in service |
| Walnut | Dense; suits generous radii; premium dark figure |
| Oak | Strong; larger radii; traditional and architectural uses |
What can go wrong — and how it is prevented
- Splits on the tension face — from bending too cold, too fast, or a radius too tight for the species. Prevented by correct steaming and a compression strap.
- Spring-back — the part relaxes out of shape after release. Prevented by full drying in the form before demoulding.
- Moisture problems in service — parts shipped too wet move, check or loosen joints in the customer’s workshop. Prevented by drying to the correct moisture content before machining.
- Short-grain failure — when a curve is sawn from solid stock instead of bent, the grain runs out at the shoulder. Bending keeps the grain continuous around the curve.
Why use a specialist bending service
Bending needs steam chambers, forms and controlled drying — capital and skill that sit outside most furniture workshops. Working with a dedicated bender means you get bent parts that hold their shape in service, with grain that follows the curve instead of being cut across it. Our 5,000 m² facility runs German machinery with CNC accuracy within ±0.5 mm, and every part passes a six-stage inspection before shipment. When your volume does not justify the equipment, the specialist converts that capital into a per-part cost — which is why even large European furniture brands have historically sub-contracted their bending.
What to send us
The most useful enquiry includes the drawing or sample, the target material, the quantity, and the application. From there, we confirm feasibility — species, radius, section — before quoting. Read more about MOQ and lead times, or see the full range of what we manufacture.
Equipment and capacity
The service runs on equipment sized for both prototypes and production: steam chambers for blanks of varying section, bending forms built in-house to each customer’s curve, drying chambers that hold parts in their forms until the geometry is locked, and CNC machining for the finishing operations that follow. Because the forms are our own tooling, a design change between prototype and production is a tooling update, not a new supplier relationship — and the same form produces every repeat batch, which is what keeps run-to-run consistency.
Industries we serve
- Furniture manufacturers — dining, lounge and occasional seating programmes.
- Contract furniture — hospitality, office and education seating built for daily-use cycles.
- Lighting brands and designers — shade frames, rings and bases.
- Interior and display fabricators — counters, trim, arches and architectural elements.
- Restoration workshops — replacement parts for classic designs no longer in production.
What we need from you to quote
The faster we can quote, the more useful the quote. The ideal enquiry includes: the drawing or sample; the target material and finish; the quantity (first order and expected annual volume); the application and any test standard the part must meet; and any certification requirement. With those, feasibility comes back with the price — not after the deposit.
Frequently asked questions
What is steam bending?
Wood is heated with steam until its lignin softens, bent around a form while pliable, then dried in the form until the new shape is stable. The grain follows the curve, so the part keeps the full strength of the timber — unlike a curve sawn from solid stock, where the grain runs out at the shoulder.
What can you bend for us?
Chair frames, backs and arms, seat and back slats, table aprons and edge bands, panels, arch components, lighting parts and other curved elements — in solid wood or laminated plywood.
What is the smallest radius you can bend?
It depends on species, thickness and grain direction — a thin ash slat reaches far tighter radii than a thick walnut section. Send us your drawing and we will confirm feasibility and recommend the right material for the radius you need.
Do you offer a contract bending service only, or full production?
Both. We can supply bent blanks for your own machining, or finished, sanded and assembled components ready for your production line.
What causes a bent part to fail, and how do you prevent it?
The four failure modes are splits on the tension face (bent too cold or too fast), spring-back (released before fully dried), moisture problems in service (shipped too wet), and short-grain failure at tight radii. Each is controlled at a specific stage of our process — steaming, drying in the form, moisture conditioning, and material selection.
How long does a first order take?
Prototypes are delivered in 7–15 days and bulk orders in 15–30 days after specifications are confirmed. The drying stage sets the floor on lead time — anyone promising faster is cutting the step that locks the shape.
Can you replicate an existing bent part?
Yes — send the original or a sample and we will match the profile, section and finish for replacement or repeat production.
Ready to start your project? Send your drawings, samples or specifications to our team and receive a quotation within 24 hours. Request a quote or learn more about our factory.