Chrome Flap Hinge Drop Leaf Folding Table G-K432

The G-K432 Flap Hinge In Six Photographed Positions

Six of the thirteen camera positions in this folder are used on this page, and the first one is the hinge as it arrives: a flap hinge in mirror polished chrome, open and laid at a low angle so both leaves, both screw patterns and the joint are in one frame. What the frames show is a plain, honest piece of furniture hardware. Two leaves of the same shape, each with one rounded outer end and one straight inner edge, each drilled with four countersunk screw holes set two by two. Between them, a joint built from a wide central tab and a set of rolled knuckles, with a steel pin running through the knuckles and its end visible at the ends of the barrel. No casting, no spring, no adjustment screw: a flap hinge in the old sense, a hinge that carries a panel through a half turn and lets it lie flat.

One thing about this batch is worth stating plainly before the frames are read. The folder holds two sets of thirteen images, one exported at seven hundred fifty pixels square and one at seven hundred fifty by eight hundred, and the second set is not a second shoot. Every frame of the second set is the same camera position as its counterpart in the first, re-exported at a different crop. Twenty-six files, thirteen real views. That is why this page speaks of six photographed positions: six of the thirteen, chosen because between them they show the whole hinge and each of them shows something the others do not.

What The Six Frames Show

The first frame is the low angle. It shows both leaves open, both with their four holes, and the joint sitting proud in the middle where the wide tab steps across the barrel. The second frame is the same hinge opened flat to a full hundred and eighty degrees and squared to the camera, which is the frame to look at if you want to read the shape: an oval ended plate, doubled, with the two inner edges meeting along the line of the barrel and the barrel standing above that line. The third frame folds the hinge to roughly a hundred and fifty degrees, and it is the frame that shows the wide tab overlapping the opposite leaf and the step cut in the leaf edge that lets the two halves close past each other.

The fourth frame is the side view, and it is the one that answers the practical questions. The hinge is folded square, so the leaf stands up from the table, and against the light you can see how thin the plate is, how the knuckle is rolled out of the plate itself rather than welded on, and how far the pin runs below the barrel. The fifth frame comes in close on the joint from three quarters and the rolled knuckles read as dark tubes either side of the bright tab. The sixth frame opens the hinge out again and gives the whole article in one view. Between them the six frames describe the hinge completely without a single dimension line, which is exactly what a buyer needs before asking for figures.

The Joint: A Wide Tab And Rolled Knuckles

The joint is the part of a flap hinge that decides whether it lasts, so it gets a section of its own. Look at the second frame in this batch: the two leaf edges meet along a straight line, and above that line sits the barrel. What forms the barrel is not a separate tube pressed into the plate. The edge of each leaf is rolled over into a knuckle, and the knuckles of the two leaves alternate along the joint, with the wide tab of one leaf stepping over the knuckles of the other. A pin passes through the whole run. When the hinge is opened flat, the two inner edges come together and the two panels end up in one plane, which is what a folding table needs: not a hinge that stops just short of flat, but one where the leaf lands level with the top.

A rolled knuckle made out of the leaf itself is why this hinge is thin at the seam. A joint built from a separate barrel needs clearance around the barrel on both leaves, so the seam stands proud by the diameter of the barrel and the table shows a step. Rolling the knuckle out of the plate keeps the barrel narrow, and the step cut in each leaf edge lets the two halves close past each other instead of butting. The side view in the fourth frame is the evidence: the plate is thin, the knuckle is barely wider than the plate, and the two leaves folded square sit close together with no packing between them. That is the geometry that makes a flap hinge of this pattern read as flush when it is open.

One Article, Three Names: Flap Hinge, Drop Leaf Hinge, Folding Table Hinge

This hinge is sold under three names and a buyer searching for any of them is looking for the same article, so the names are worth setting out once. It is a flap hinge, because the panel that drops down on a table is called a flap and this is the hinge that carries it. It is a drop leaf table hinge, because the commonest place to find one is under the end leaf of a dining table that folds down against the side. It is a folding table hinge, because the same hinge is what lets a folding table fold: two of them at the seam, and the top goes from flat to stored in one movement. Trade catalogues add a fourth name, the table leaf hinge, and a fifth, the sewing machine table hinge, because the sewing machine cabinet with its folding top was the article that made this shape universal.

The names matter for ordering rather than for the hinge itself. A buyer who asks for a drop leaf table hinge is usually fitting a leaf to a table that already exists and needs the hinge to match the thickness of the top and the depth of the seam. A buyer who asks for a folding table hinge is usually building a new top and needs the joint to come up flat and take the weight of the panel without the seam lifting. A buyer who asks for a flap hinge is often repairing something else altogether, a desk return, a workbench shelf, a counter extension. Same hinge, three different sets of questions, and the answers to all of them are on this page.

Because the three names are used loosely in the trade, it is worth saying what this hinge is not. It is not a concealed cabinet hinge: there is no cup, no arm, no overlay setting, and nothing about it is hidden once it is fitted. It is not a butt hinge for a door: a door hinge is sized to carry a heavy leaf on a vertical edge, while this one is sized to sit at a horizontal seam and hold a panel flat. It is not a self-supporting stay either: this hinge carries the panel through a half turn, and a leaf that has to be held up on its own needs a stay behind it. Knowing which of those a project needs before ordering saves a return.

Where A Flap Hinge Like This Is Fitted

The frames show the hinge on a white background, so what it is fitted to comes from the shape rather than from the photograph, and the shape points at a short list of jobs. A drop leaf table is the first: the leaf folds down against the side and the hinge has to bring it back up level with the top, which is the job the flat open position in the second frame is for. A folding table is the second: a card table, a camping table, a canteen table, a table that lives folded against a wall. A sewing machine cabinet or a sewing table is the third, with a top that folds back and a tray that lifts. A desk return is the fourth, where a side panel drops to make the desk narrower when it is not in use.

Then there are the jobs where a flap hinge turns up because it is the plainest way to join two panels at a seam. A workbench with a drop-down shelf at the end. A shop counter with an extension leaf. A vanity or dressing table with a folding mirror panel. A camper van or a boat, where a table has to fold away and the hardware has to be light and thin. An ironing board that folds, a keyboard shelf that lifts, a laundry cabinet with a folding top. In every one of those the hinge is doing the same thing: carrying a panel through a half turn, coming up flat at the end of the turn, and staying thin at the seam so the two surfaces line up. The screw pattern supports that, because four countersunk holes set two by two put a fixing near each corner of the leaf, which is where a panel wants to be held if it is not to lift at an edge.

How Many Hinges A Leaf Needs

The question a buyer asks most often about a flap hinge is how many to order for one leaf, and it is a fitting question rather than a hinge question, so it is answered as guidance rather than as a figure. A leaf is carried on a line of hinges along its seam, and the number follows the width of the leaf and the weight of the panel rather than the size of the hinge. A narrow leaf on a light panel takes two, one near each end, set in from the edges by the same amount so the leaf folds square. A wide leaf on a heavier panel takes three or five, spaced evenly, because a hinge at each end and nothing in the middle lets the panel sag at its centre and the seam lift when the leaf is loaded.

Two rules follow from the way this hinge is built. The first is that the hinge count goes up along the seam rather than the hinge size: adding a hinge is how a wider leaf is carried, and a hinge of this pattern cannot be stretched to do the work of two. The second is that the screw pattern on the leaf has to be drilled to the same spacing on both panels, because the rolled knuckles and the wide tab only close past each other when the two halves of the hinge are aligned. Drill one panel from the hinge and the other by eye and the hinge will bind at the end of its travel. The sample service exists for exactly this: set a hinge into an offcut of your own panel, run the flap through its full travel, and the right count for your leaf becomes obvious before any production order is placed.

Fixing, Finish And What To Check On The Hinge

The fourth frame is the fitting frame. Folded square, the hinge shows its plate thickness against the light, and that thickness is what decides the depth of the mortise or the height of the packing under the leaf. It also shows the pin standing a little below the barrel, which is normal on this pattern and useful: the pin can be driven out if a hinge ever needs to be separated without unscrewing a panel. Every hole in both leaves is countersunk, so a flat head screw seats with its head at or below the surface and nothing stands proud at the seam for a cloth to catch or a hand to feel.

The finish is mirror polished chrome over the whole hinge rather than on the visible face only, and the frames show it in the holes and on the inside of the knuckles as well as on the leaves. That matters on a table, because a chrome finish that stops at the face leaves a bare edge at the seam where moisture gets in and the plating lifts. Chrome is also the finish that survives wiping, which is what a table gets. On the hinge itself, three things are worth checking on receipt: that the pin is seated and does not walk out at either end, that the two leaves close past each other without binding at the step, and that the plating is continuous inside the countersinks, since that is the first place a cheap hinge shows a bare spot.

The hinge is supplied as the article in these frames, with no screws in the frame and no screw count promised on this page. Fixings are agreed with the order, because the screw that suits a table top depends on the thickness and the material of the panel rather than on the hinge. Where the hinge is going into a thin panel, the screw length is the figure to settle first, and where it is going into a solid top a longer screw with a countersunk head to match the hole is the usual answer.

Questions A Hinge Buyer Asks

The questions below are the ones that come back most often on a flap hinge of this pattern, and each answer points at the frame or the feature it comes from.

• What is this hinge called? A flap hinge, a drop leaf table hinge, a folding table hinge or a table leaf hinge, all the same two-leaf article.
• How far does it open? Through 180 degrees, with the two leaf edges meeting along the barrel so the panels end up in one plane.
• How many screw holes has each leaf? Four, countersunk and set two by two, which puts a fixing near each corner of the leaf.
• Is the hinge handed? No, the two leaves are the same shape, so the same hinge serves the left and the right end of a leaf.
• What is it made of? Chrome plated steel, formed from sheet with the knuckles rolled out of the leaf edge rather than a casting.
• Does it lie flush at the seam? Yes, that is what the rolled knuckle and the stepped leaf edge are for: the barrel stays narrow so the seam does not stand proud.
• Will the pin come out? The pin is visible below the barrel in the side view and can be driven out, which lets a fitted hinge be separated without unscrewing a panel.
• What size is it? This batch carries no dimensioned frame, so no figure is quoted here; the drawing issued with the quotation gives the leaf size, the hole spacing and the plate thickness.
• How many do I need for one leaf? Two for a narrow light leaf, three or five for a wide or heavy one, spaced evenly along the seam rather than relying on a larger hinge.
• Where is it used? Drop leaf dining tables, folding and card tables, sewing machine cabinets, desk returns, workbench shelves, counter extensions and camper van tables.

Checks Before A Flap Hinge Leaves The Bench

A flap hinge is a small part on a large panel, and a hinge that binds at the end of its travel is not discovered until the table is finished. The checks below are the ones that catch it early, and each is a hinge check rather than a table check.

• Hinge run through its full travel on the bench before it goes near a panel, checking for binding at the step.
• Hinge pin checked at both ends, seated and not walking out of the knuckle run.
• Hinge plating checked inside the countersinks, where a thin finish shows first.
• Hinge screw pattern transferred to both panels from the hinge itself, not drilled by eye.
• Hinge positions set in from the leaf edges by the same amount at both ends, so the leaf folds square.
• Hinge count along the seam agreed against the leaf width before any hole is drilled.
• Hinge plate thickness measured against the mortise or the packing, since that is what sets the seam height.
• Hinge screws checked again after a week of use, because countersunk fixings settle and a loose hinge lifts the seam.

Who Supplies This Hinge

This flap hinge is supplied by Guangzhou Gorgeous Intelligent Technology Co., Ltd., a furniture and architectural hardware business whose range covers hinges, drawer slides, handles, stays, legs, castors, locks and the connecting plates that go with them. The company works to export orders: quantity, packing, carton marking, barcodes and shipping documents are agreed before production rather than after it, and the specification written on the order is the specification the factory works from. The leaf size, the hole spacing, the plate thickness and the finish are all part of that specification, which is why the drawing matters more than a description on a hinge of this kind.

Ordering

Send the model number G-K432 with the number of hinges you need, the screw pattern you want and the finish, the carton marking and the destination port, and confirm the plate thickness and the hole spacing against the drawing at the same time. Samples are available before a production order so a hinge can be set into an offcut of your own panel and the flap run through its full travel, which is the fastest way for both sides to agree that the leaf comes up flat and that the seam closes without a step. The drawing, the packing list and whatever test documentation we hold for G-K432 are issued on request, and delivery and payment terms are agreed order by order on the proforma rather than assumed from a previous order.