Bent Wood Chair Frames: Custom OEM Manufacturing
We supply steam-bent and press-curved chair frames in ash, beech, birch plywood and walnut, built to your drawings with a 1:5 to 1:10 bend-radius ratio. Every frame is dried to below 12% moisture and machined to ±0.5mm before assembly.
We manufacture bent wood chair frames to our clients’ specifications — steam-bent or laminated frames for dining chairs, lounge seating, contract furniture and OEM chair programmes. See our bentwood chair frame with white ash for a representative build.
Why bend a chair frame?
Steam bending lets the wood grain follow the curve of the frame instead of being cut across it. A frame assembled from straight segments concentrates stress at every corner joint — and shows a glue line that will eventually crack along the finish. A bent frame has no corner joints at all: the grain runs continuously around the curve, so the part flexes with the load instead of failing at the joint. For chair design this means slender, ergonomic frames that still pass strength testing, with fewer parts and less assembly labour.
Frame types we manufacture
- Side and dining chair frames — rear legs, back frames and stretchers bent to your drawing.
- Armchair frames — including continuous arm bows integrated with the back frame.
- Lounge and low-seating frames — deeper curves, wider sections, upholstery-ready.
- Stacking and contract frames — engineered for the daily-use cycles of hospitality and office markets.
- Replacement frames — matched to originals for classic designs and refresh programmes.
Specifications
| Construction | Solid steam-bent or laminated (bent plywood) frames |
| Materials | White ash, beech, birch, black walnut, mixed hardwoods |
| Dimensions | Custom to drawings; CNC accuracy within ±0.5 mm |
| Finishes | Raw, sanded, oiled, stained or lacquered |
| MOQ | Low — prototype from 1 piece |
| Lead time | Prototype 7–15 days · bulk 15–30 days |
| Certification | FSC/PEFC materials available |
Choosing the material for a frame
The species decision drives how tight a radius the frame can reach and how it behaves in service:
- Ash — elastic and shock-resistant, the default for slender frames and tight radii; pale and stain-friendly.
- Beech — fine and even, bends reliably to small radii; the classic choice for painted and traditional seating.
- Walnut — denser and darker, for premium frames with generous radii; often used as a face over a laminated core.
Manufacturing process
- Material selection and moisture conditioning.
- Steam bending or lamination in moulds built to your drawing.
- Controlled drying to lock the shape.
- CNC cutting, drilling and fine sanding to final dimensions.
- Six-stage quality inspection before packing.
Because the moulds are built in-house, a design change between prototype and production is a tooling conversation rather than a new supplier relationship.
Who we supply
Furniture brands, contract seating manufacturers, OEM chair makers and designers who need consistent bent frames across repeat production runs — including programmes supplying hospitality, office and education markets in the EU and US. Frame programmes typically combine with our chair backs, slats and aprons.
Design considerations for bent frames
Three decisions at the drawing stage decide how well a frame can be bent — and how it will behave in service:
- Radius against section — every species has a minimum radius for a given thickness. A 12 mm ash section bends comfortably where a 12 mm walnut section would not. If your design needs a tight curve, either accept a thinner section or move to a laminated construction.
- Grain direction — the blank must be cut so the grain runs along the curve. A frame drawn without regard to grain direction will fail at the shoulder regardless of how well it is bent.
- Upholstery and assembly — bent frames that will be upholstered need flat lands for the padding to attach to, and frames that assemble with hardware need drilled and countersunk points. Both are machined after bending, so they belong on the drawing.
Bent vs jointed: a practical comparison
| Bent frame | Jointed frame | |
| Grain | Continuous around the curve | Cut across at every corner |
| Stress points | Distributed along the curve | Concentrated at each joint |
| Finish durability | No glue line to crack | Finish cracks along joints over time |
| Parts and labour | Fewer parts, less assembly | More parts, more joints to make and inspect |
| Material use | Less waste at generous radii | Segments cut from straight stock |
Quality control for frame programmes
Frame programmes live or die on consistency: a frame that varies 2 mm between batches costs your assembly line rework. Our controls are built around that — dimensional checks to ±0.5 mm after machining, moisture verification before finishing, and joint integrity checks on every frame. Inspection reports accompany each shipment so your incoming QC can trace any issue to a stage.
From drawing to delivery
A frame programme runs on a predictable timeline, and knowing where the time goes helps you plan around it:
- Quotation and feasibility — within 24 hours of receiving the drawing or sample. This is where radius, section and species are confirmed, and where anything that will not bend reliably gets flagged.
- Prototype — 7–15 days. The form is built, the first frames are bent, dried, machined and finished, and shipped for your approval.
- Production — 15–30 days after sample approval, depending on quantity and finish. The drying stage sets the floor on this timeline; it is the one step that cannot be compressed without risking the geometry.
- Repeat orders — same tooling, same process, so the second batch matches the first. Tooling records are kept on file.
Packaging and shipping
Bent frames are packed to protect the curve: shaped cartons or crates that support the frame along its length, with corner protection at the bends. We ship globally, with regular programmes to the EU, US and Southeast Asia, and every shipment carries a full warranty against warping and cracking in transit and use.
Frequently asked questions about bent wood chair frames
Can you make chair frames to our own design?
Yes — we manufacture to your drawings, CAD files or physical samples. Our engineering team confirms feasibility, material and tolerances before tooling begins, and flags any radius or section that will not bend reliably.
What materials do you use for chair frames?
White ash, beech, birch, black walnut and mixed hardwoods, in solid steam-bent or laminated construction. FSC/PEFC-certified stock is available. See our species guides for ash, beech and walnut.
What tolerances can you hold?
CNC machining delivers dimensional accuracy within ±0.5 mm on finished dimensions, and every frame is checked for moisture content and joint integrity before shipment.
Solid or laminated construction — which is better?
Solid steam-bent frames keep the grain continuous and are strongest where the section is slender and the radius generous; laminated frames allow tighter curves and better run-to-run consistency. Many programmes use both. See our comparison of the two constructions.
Do you supply small quantities for prototypes?
Yes. Low MOQ is supported: prototypes in 7–15 days, production runs in 15–30 days.
Can you replicate an existing frame for replacement production?
Yes — send the original frame or a sample and we will match the profile, section and finish. This is a common request for classic seating programmes and contract furniture refresh cycles.
Do your frames pass strength testing?
Bent frames are used in contract seating worldwide because continuous grain resists the flexing that cracks jointed constructions at the corners. We will advise on section and species for your intended test standard, and can supply test samples before production.
Request a quote for your chair frame programme. Send drawings, CAD files or a physical sample and our engineering team will confirm feasibility, material and tolerances within 24 hours. Prototypes ship in 7–15 days; production in 15–30 days after approval. Request a quote · Tour the factory