Frequently Asked Questions

We manufacture sofa mechanisms (zero, relax, tekyat and CSS series), bed base lift mechanisms, table and coffee table mechanisms, back and arm motion mechanisms, module connection components and furniture equipment such as adjustable centre legs. You can browse every product family on the Products page.

Start with what the sofa needs to do. Zero mechanisms suit models that must open close to the wall, relax mechanisms suit comfort-focused reclining, tekyat mechanisms suit compact spaces and the CSS series suits models that combine seating and bed functions. Frame size, opening distance and upholstery structure are then evaluated together. Share your model drawing and dimensions, and our technical team will recommend a suitable mechanism.

No. Besides the nominal size such as 160, 180 or 200 cm, the inner geometry of the bed base, mattress and lid weight, gas spring rating, opening direction and the connection points of the mechanism must be verified together. A gas spring rating that does not match the load can make the lid hard to lift or keep it from staying closed.

CSS 2 offers the core function and a short-trim option. CSS 3 comes in standard, stop/stepped and eco variants. CSS 4 stands out with a reduced-screw structure and round plastic or zamak surface options, while CSS 4 ABS adds single-screw assembly and a structure suited to knock-down shipment.

We evaluate project requests from furniture manufacturers in serial production. Send our sales team your model drawing, target function, frame dimensions and estimated quantities, and we will review together which existing products fit and what adaptations are needed.

Use the quote request button on a product page, or contact us through the contact form with the product code, quantity and delivery location. Price, lead time, delivery terms and payment conditions are stated in writing in the quotation; an order becomes final once these terms are confirmed by both sides.

Yes, some of our products are sold in the Erhun stores on Trendyol, Hepsiburada and Amazon. You can see them on the e-Sales page and go straight to the store with the buy buttons on the product page. For products not available on the marketplaces, please contact us.

Yes. Send your sample request to our sales team together with the model you plan to use the mechanism in and the estimated quantity. Sample conditions are set per request. Unless agreed otherwise in writing, sample approval does not constitute a serial order.

Minimum quantity and lead time depend on the product, order volume and stock situation, and are stated in writing in your quotation. For planned, recurring purchases, sharing your requirements in advance helps shorten lead times.

For products that have a technical drawing or assembly diagram, the files are in the Technical Information area of the product page. If the document you need is not there, write to us with the product code and we will pass your request to our technical team.

Mixing up left and right parts, off-axis connection holes, wrong fasteners, upholstery entering the mechanism's motion area and starting serial production without a full open-close test are the most common errors. Working to the assembly sheet and approving the first piece greatly reduces these risks.

No heavy maintenance is needed. Keep the mechanism clean and dry and check the fasteners for loosening or deformation from time to time. If movement becomes difficult, inspect the assembly and parts before further use, and do not apply lubricants or interventions not specified in the technical documentation.

The general warranty period for Erhun products is 2 years. Warranty scope and start date are assessed together with the invoice, sales document, product documentation and any written agreement between the parties.

The product code, invoice or dispatch details, photos of the furniture the product is used in and a short description of the issue speed up your claim; if possible, add a video showing the movement. Cases arising from wrong product selection, faulty assembly, use beyond rated capacity or unauthorized modification are reviewed product by product.

We use robotic welding and electrostatic powder coating on our metal mechanisms, which deliver repeatable strength and consistent surface quality in serial production. We treat welding, surface preparation, coating and assembly as quality steps that directly affect the product's service life.

Yes. For international requests, contact our export team at export@erhun.com.tr or +90 507 803 76 16. Sharing the product code, quantity and destination country speeds up the quotation.

Our current Turkish and English PDF catalogs are on the e-Catalog page. You can view them in your browser or download them as PDF.