How This Metal Cabinet Hinge Is Fabricated and Checked

A hinge is a mechanism made to tight tolerance and supplied in volume, which makes it a different kind of job from the enclosures and frames elsewhere on this site. The pin holes have to line up, the leaves have to be flat, and the answer to almost every complaint about a door that sags is found in those two facts rather than in the material.

Because the part is small and supplied in volume, the checks that matter are dimensional, and they are described on our inspection page.

Where Metal Cabinet Hinge Can Be Revised Without New Tooling

A hinge is a small, high-volume part, so the economics of change are different from a large fabrication. Below the tooling threshold changes are open; above it they are not.

Short Answers on Metal Cabinet Hinge

Does a 270 degree hinge mean the door opens 270 degrees?

Not on its own. The figure describes the movement the hinge can make, and the door can only open as far as the installation allows. A cabinet side panel, an adjacent unit or a wall will stop the door well before that, and a door with a thick carcass can be blocked earlier still by its own thickness. If the opening angle is a real requirement, tell us the carcass thickness and what sits alongside the cabinet, and the geometry can be checked rather than assumed.

Why is the minimum order 1000 pieces?

Because of the press tool. At low volume the leaf is laser cut and formed individually, which is flexible but carries a higher unit cost. Once the volume justifies a press tool, the blanking cost per part falls sharply but the tool has to be paid for once. That is the trade-off behind the minimum order figure. If your requirement is below it, laser-cut hinges are perfectly workable and the quotation will show which route it is based on.

What actually makes a door sag?

In order of how often we see it: the screws working loose, the hinge leaf bending because it is too thin for the door weight, and play between the pin and the knuckle bore. Notice that the material grade is not on that list. A stainless hinge with loose pin fit will sag just as readily as a coated-steel one. This is why the cycling check and the play check at assembly matter more than the steel spec, and why we check them on every batch rather than on a sample at the start.

Send the leaf dimensions, the screw hole pattern, the door thickness and weight, and the volume you expect per year. The last number decides whether this is quoted as a laser-cut part or as a tooled one. Send your requirements for a quotation.

If your volume is below the tooling threshold, say so and the quotation will be based on a laser cut and formed part rather than a tooled one.

A Hinge Is a Wear Item That Nobody Specifies as One

A cabinet hinge is the only part on a cabinet that moves every time the cabinet is used, and it carries the weight of the door at the same time. That combination – repeated motion under load – is what wears things out, and it is why a hinge fails long before the door or the cabinet does. The wear point is the pin and the knuckle it turns in. A pin that is too soft wears; a knuckle that is too thin ovalises; and once the knuckle is oval the door drops and no amount of adjustment on the screw holes brings it back.

• Stainless on stainless is a poor bearing pair unless the grades differ or the surfaces are treated. It galls. A hinge specified entirely in one grade for the sake of a material line is a hinge with a shorter life.
• 2.0 mm on a hinge leaf is about stiffness at the knuckle, not about strength in the leaf. The leaf has to stay flat enough for the knuckles to stay in line.
• Polished finish on a hinge is cosmetic. The working surfaces are inside the knuckle, and a polish that does not reach there does nothing for the wear.

Opening Angle Is a Clearance Problem Before It Is a Hinge Problem

A hinge described by its opening angle is usually being asked the wrong question. What decides whether a door opens fully is what it hits – the adjacent cabinet, the wall, the handle on the door next to it, or the hinge knuckle binding against its own leaf. Full opening is a clearance calculation around the hinge axis, and it is cheaper to solve by moving the axis than by buying a hinge with a wider angle.

Two details get missed. The first is hinge count: a tall or heavy door on two hinges will sag between them, and the sag shows as the door dropping at the latch. The second is the fixing – a hinge screw into the edge of a board or into thin sheet will pull out, and the hinge should be specified with the substrate in mind. If you tell us the door weight, the door thickness and what the cabinet is made of, we can specify the hinge, the pin and the fixing as one item rather than three. Lead time is quoted after drawing review and process confirmation.

Payment Terms

How a project is paid for is agreed before production starts, and the structure that applies to your order is stated on the quotation and on the order confirmation, so there is no ambiguity later.

• 30% advance payment with the order and the 70% balance before shipment — our standard structure.
• 70% advance payment with the order and the 30% balance before shipment — used for some projects.
• 100% payment in advance before production starts — used for some projects.

If your finance team works to a fixed structure, say so in the first enquiry and we will confirm what applies to your order before you commit. Request a quotation.

Questions buyers ask before sending drawings

The questions that come up most often before a project starts, answered the way we answer them by email.

What do you need from me to quote Metal Cabinet Hinge?

2D drawings as PDF, DWG or DXF, or 3D files as STEP, IGES or SolidWorks, together with material grade, sheet thickness, surface finish, quantity and destination country. If the drawing is not finished yet, send a photo, a sketch or the existing part instead — we review what can be measured from it and reply with the questions that still need answering.

How long does a quotation take?

Enquiries are answered within one business day. Simple laser-cut and bent parts are quoted within 24 hours. Welded frames, assembled units and multi-part structures are quoted after the drawing review and process confirmation, and the date is confirmed in our reply.

Is there a minimum order quantity?

Prototypes are made from a single piece and small batches of 10–50 pieces are routine. Prototype, first batch and repeat volume are quoted together so the numbers stay consistent as the project scales.

Can you work from a sample or a photo if I have no drawing?

Yes. Send the part itself, clear photographs with a rule or caliper in frame, or a dimensioned sketch. We measure what can be measured, list what is still undefined, and confirm it with you before production.

Send Your Drawings

Need a Similar Part?

Most enquiries that start on a page like this are not an order for Metal Cabinet Hinge — they are a search for a factory that can make something like it. Send us your drawing, 3D model or sample and we will review the manufacturing process and the quotation requirements, then come back with a process plan, a price and a lead time.

We work from 2D drawings, STEP / DWG / DXF / PDF files, or a physical sample if that is all you have.

Send Your Drawings

No complete drawings yet? Describe the part, send photos or a sketch, or send a sample — we can start from there. Discuss your project.

Trade Terms and Delivery

We quote under the standard Incoterms your logistics team already works with, and build the packing and documentation around the one you choose.

• EXW — you collect from our Ningbo facility and run export clearance through your own forwarder.
• FOB Ningbo — we deliver to the vessel at Ningbo port and handle export clearance.
• CIF — we cover carriage and insurance to your named destination port.
• DDP — we handle carriage, insurance, import clearance and duties through to your door.

Send your destination country, target delivery date and preferred trade term together with the drawing. Request a quotation.

Quotation Time

We quote from your drawings. How long that takes depends on what the part asks for:

• Simple parts — quoted within 24 hours. Laser-cut blanks and bent components, supplied with complete 2D or 3D drawings. Mon–Fri, GMT+8.
• Complex assemblies — quoted after the drawing review. Payment kiosks, multi-part welded frames, enclosures with purchased hardware, or anything needing a coating or assembly trial. We confirm a quotation date once the scope is clear.

Production lead time is quoted separately, after drawing review and process confirmation. Send your drawings.

What stands behind this quotation

• Manufacturing since 20162,500 m² Ningbo plant — 3 laser cutting machines (including newer TRUMPF), 4 CNC press brakes and 10 welding stations.
• Shipped to more than 30 export marketsEnclosures, cabinets and formed parts supplied to OEM buyers across Europe, North America and Asia.
• 123 documented product casesMedical device housings, HVAC and heat pump enclosures, agricultural and livestock equipment, industrial hydraulics, material handling trolleys and EV charging cabinets.
• Factory evidence you can checkTUV Rheinland audit reference MIC-ASI243729 and Bureau Veritas reference MIC-ASR263630 available for buyer review under NDA.

Before you send drawings: an NDA is signed on request · first-article inspection is carried out before a batch continues · pricing is staged from prototype quantity to repeat volume · pre-shipment photos and packing records are prepared when the project needs them.