Four Hole Clip On Cup Hinge Soft Close Aircraft Base F850H

Product Overview

F850H is a concealed cabinet hinge built on a wing shaped base and coupled to that base with a clip, which is what the self detaching wording in the model name describes: the door can be taken off and put back without undoing a single screw. The hinge is fixed to the door through two round countersunk holes in the cup flange, and the base is fixed to the carcass through two oblong slots, one in each wing. Four fixing points across the assembled hinge is what the four hole name refers to, and the straight-on photograph in this listing shows all four in one frame, which is why it is used as the lead image.

The closing action is hydraulic. A damper works inside the hinge arm, and the underside photographs in this listing show the spring, the linkage and the damper barrel in the arm channel, so the buyer can see the mechanism that does the soft close rather than taking the word for it. On the arm face there are two cross-head adjustment screws with an oblong window between them, and those screws are what set the door after the base has been fixed.

How The Self Detaching Coupling Works

The base plate carries a reception slot at its coupling end with hook tabs formed at the sides. The hinge arm end has a boxy steel cover with a small protruding latch tab. Pushing the hinge onto the base drives that cover into the reception slot until the hooks engage, and the engaged hooks are what stop the hinge pulling off the base while the door is hanging on it. To take the door off you lift it to carry the weight off the hinge and then work it off the base at the latch end; to put it back you align and push until it seats. There is no round push-button on this hinge, and the photographs do not show one, so the release is a lift-and-pull action at the latch rather than a pressed button.

Two of the photographs in this listing show the product deliberately in two pieces - hinge body and base plate separated - which is the clearest way to publish what is actually delivered and what the fitting looks like when the door is off. For a service team that matters: the person removing a door in year five of a furniture's life needs to know that the base stays exactly where it was set on the carcass, and that only the hinge moves.

What You Get On This Hinge

• A hydraulic soft close cup hinge: damper barrel, spring and linkage working inside the arm.
• A wing shaped base plate with an oblong adjustment slot in each wing for lateral and in-and-out setting.
• A cup flange with two round countersunk fixing holes, drilled for a standard concealed hinge boring.
• A clip-on, self detaching coupling with hook tabs and a latch tab, so the door lifts off without tools.
• Two cross-head cam screws on the arm face with an oblong window between them for door gap adjustment.
• A bright plated finish across cup, arm and base so the visible parts of the hinge read as one fitting.

Technical Reference For This Hinge

We publish figures for a hinge only where they are on our drawing. For F850H the geometric set - cup diameter, cup depth, hole pitch, the distance from the cup bore to the base face, base fixing centres and the opening angle of the hinge - is issued on the drawing on request, and a buyer should machine from the drawing rather than from a listing. What can be stated here is the fixing pattern, the coupling type and the reference mass.

The reference mass is a catalogue figure for freight planning. Weighing a sample of hinges out of a batch is also our fastest check against a short supply or a substituted arm, so the packing list carries the measured batch number rather than this one.

Fitting This Hinge

Bore the door for the cup, set the hinge in the boring and drive the two round countersunk screws. Fix the wing base to the carcass through one oblong slot per wing, leaving the screws short of home so the base can still slide. Hang the door by pushing the hinge onto the base until it seats at the latch end, then set the door: lateral and in-and-out position through the remaining play in the oblong slots, and door face alignment through the two cam screws behind the window in the arm. Draw the base screws up last, and check the swing afterwards, because drawing up a base can change the arm alignment by a fraction of a millimetre.

The two mistakes that put this kind of hinge under load it was not designed for are the same on any concealed hinge. A cup boring that is too shallow leaves the hinge proud of the door face, so every close racking the arm sideways. And a screw that is too short for the panel, because a self detaching hinge is hung and re-hung, and the base fixings are the only thing that has to survive that repeatedly.

How Many Hinges A Door Needs

Hinge count follows door height and door mass rather than preference, and a clip-on hinge does not change that arithmetic. A door under roughly two kilograms and under 900 mm high is carried by two hinges of this type. Above that, add a third hinge at mid height, and keep adding one hinge per further increment of height or mass, because the failure in a tall door is never the top hinge - it is the middle of the door sagging while both end hinges stay sound. On a soft close door the count also sets the closing feel: a damper hinge is dimensioned against a door mass, and a heavy door hung on the minimum number of hinges leaves each damper working at the top of its range so the last few degrees of travel slow visibly. One more hinge spreads the same duty over more dampers and is usually cheaper than moving to a heavier hinge.

What We Check Before A Hinge Order Leaves

Every hinge batch is sampled on four points before packing. Function: the hinge is worked through its full swing by hand and the damper must hold the last part of the travel rather than letting the hinge snap shut, which is the only practical way to catch a hinge whose damper was filled short. Coupling: the hinge must push onto the base with firm resistance, must not pull off under a loaded door, and must still release by lift and pull at the latch without a tool - a coupling that is too tight is as much a fault as one that is too loose, because the fitter will force it and bend the arm. Plating: cup, arm and base are inspected against the approved sample for coverage at the cup edge, inside the oblong slots and behind the hook tabs, which are the places a plating bath drains badly. Mass: a sample of hinges is weighed out of the carton, which catches a short supply, a missing base or a substituted arm without a damper.

The batch is photographed before packing and the photographs are kept against the order. Where a buyer works with an inspection agent, the agent is welcome, and the hinges we pull for our own check are the ones shown to them.

Where This Hinge Belongs, And Where It Does Not

A clip-on, self detaching hinge on a wing base is the right hinge for interior joinery whose doors will have to come off at some point: wardrobes and fitted furniture, vanity units, wall units over worktops, retail, office and institutional casework where a shelf or an internal fitting has to be reached past a door. It is also the practical choice on production door lines, because a door can be hung, removed for adjustment and re-hung while the base stays exactly where it was set.

It is the wrong hinge for a marine locker, a hosing-down area, a food processing room or an unventilated external cupboard. Moisture standing at the contact between a plated arm and a plated base, and inside the coupling where the hooks engage, will work on the fitting regardless of how well it was installed, and this hinge is not offered for that duty. Where a door is never removed in service and the cheapest life-cycle cost matters, the fixed-base member of the family is the better specification, since it has one fewer interface in the load path.

Where This Hinge Sits In The Range

F850H is the four fixing, self detaching member of the aircraft-base family we supply. Alongside it sit the fixed-base versions whose plates are screwed down and stay put, the hook-plate versions whose doors release by lift and pull at a hook tab, the standard narrow-plate hinges for light doors, and the fixed and bent-cup variants that cover full-overlay and half-overlay applications. The cup boring is common across the family, so a customer tooling up on this hinge can change the closing action or the coupling style later without changing the boring template on the door line. That is why the family is normally specified together rather than one hinge at a time.

Who Makes This Hinge

This hinge is produced for Guangzhou Gorgeous Intelligent Technology Co., Ltd., a furniture and architectural hardware supplier whose range covers hinges, drawer slides, handles, stays, legs, castors, locks and the fitting sets that go with them. The company works to export orders: carton quantities, marking, barcodes and the documents a buyer needs at their own customs are agreed before production rather than after it, and the hinge specification on the proforma is the specification that is made.

Common Hinge Faults And What They Actually Mean

A door that drops over time is almost always a fixing problem rather than a hinge problem. The hinge is the strongest part of the joint; the board the hinge screws into is not. In chipboard and MDF the holding power depends on the pilot hole and the screw gauge, and a base that has been screwed and unscrewed repeatedly during fitting loses grip - which shows up as the base pulling away from the carcass while the hinge itself is still sound. A self detaching hinge reduces how often that happens, because the door comes off at the coupling instead of at the screws, but it does not make the board immune.

A soft close hinge that stops damping has usually been worked past its duty: either the door is heavier than the hinge was specified for, or the door has been pulled closed by hand against the damper. The damper in a hinge arm is a hydraulic restriction, not a brake, and repeated manual overrunning is what empties it. A hinge that has lost clip force, so the door lifts off the base too easily, is normally a base that was fitted twisted, so the arm meets the edge of the reception slot instead of the slot itself - slacken the base, seat it flat and the coupling should return to firm hand pressure.

Questions Buyers Ask About This Hinge

What does the four hole name mean on this hinge?

It is the fixing pattern of the assembled hinge: two round countersunk holes in the cup flange on the door side and two oblong slots in the wings of the base on the carcass side. The straight-on photograph shows all four. If your drawing calls for four holes in one part instead, send the drawing and we will confirm the variant before production.

How is the door removed?

Lift the door to carry its weight off the hinge, then work the hinge off the base at the latch end. The base stays exactly where it was set on the carcass, and no screw is undone.

Is there a release button?

No. This is a latch and hook coupling, not a push-button clip. The arm end carries a small protruding latch tab and the base carries hook tabs, and the release is a lift and pull at that end.

Is it a soft close hinge?

Yes - hydraulic, with the damper inside the arm. The underside photograph in this listing shows the spring, linkage and damper barrel, and the two-piece photograph shows the barrel from the other side.

Are screws included?

Not as standard. Screw gauge and length depend on the door and carcass panel, and we would rather the buyer specify the fixing for the board than accept ours and find the holding power short.

Can you supply other overlay variants?

The cup boring is shared across the family, so full-overlay and half-overlay variants can usually be arranged. Send the door drawing and the required overlay figure and we will confirm what this hinge can be made to do.

Sign-Off Checklist Before You Order This Hinge

• Door mass and height confirmed against the hinge count, with an added hinge at mid height on tall doors.
• Door material and panel thickness confirmed against the screw holding requirement of the wing base.
• Cup boring diameter and depth confirmed against the drawing for this hinge, not against a previous hinge.
• Four fixing pattern confirmed against the buyer drawing, since the model name describes cup plus base holes.
• Overlay requirement confirmed, so the correct plate variant of the family is ordered.
• Latch and hook release confirmed as acceptable for the end user, since there is no push-button on this hinge.
• Screw specification agreed separately, since fixings are not supplied as standard with this hinge.
• Environment confirmed as dry or moderately humid; wet and hosed areas are outside the duty of this hinge.
• Packing, carton quantity and marking confirmed against the order before the hinge batch starts.

Ordering

Send the model number F850H with the quantity, the destination port and the carton marking you need. Sample quantities are available before a production order so the hinge can be bored, clipped and swung in your own panels, which is the fastest way for both sides to agree that the hinge is right for the job. Drawings, the reference mass sheet and whatever test documentation we hold for this hinge model are issued on request, and delivery and payment terms are agreed order by order on the proforma rather than assumed.