Fitting a Cabinet Door — Step-by-Step Guide

July 11, 2026

In modern furniture construction, fitting a cabinet door is carried out almost exclusively using a concealed cup hinge, which is secured to the carcase via a cruciform mounting plate and then adjusted in three dimensions.

A precisely fitted cabinet door is the result of careful preparation and accurate drilling and routing dimensions. Whether building a new piece of furniture or replacing worn hardware, understanding the kinematics of the hinge and the underlying grid dimensions is essential for smooth operation. This guide takes you through the entire door installation process – from selecting the correct hinge and drilling the cup holes to final gap alignment.

For experienced hands, the time required to fit a door from scratch, including drilling and measuring, is around 15 to 20 minutes. With pre-drilled carcase components, this is reduced to under five minutes.

Required Tools & Materials

Specific tools are required for a professional and tear-out-free installation. Improvising often leads to misaligned doors or damaged substrate panels.

Cordless drill/driver or mains drill
Forstner bit (Ø 35 mm for standard hinges, Ø 26 mm for mini hinges)
Wood drill bit (Ø 5 mm for Euro screws or Ø 3 mm for pre-drilling wood screws)
Screwdriver with PZ drive (Pozidriv, size 2)
Folding rule and try square
Joiner's pencil or bradawl
Matching cup hinge complete with cruciform mounting plate
Chipboard screws (typically 3.5 x 16 mm) or Euro screws (6.3 x 13 mm)

Preparation: Determining Hinge Type and Overlay

Before positioning the first drill bit, the geometric layout of the cabinet must be clarified. The opening behaviour and the position of the door when closed determine the choice of hinge.

Full overlay: The cabinet door covers the carcase side panel almost entirely when closed. The opening angle is usually 95° or 110°.
Half overlay (twin overlay): Two doors share a single central carcase divider. Each door covers only half the edge of the divider (approx. 9.5 mm). The hinge arm features a visible crank.
Inset: The door sits flush inside the carcase openings. The front edges of the carcase remain visible. The hinge has a prominent, deep crank.

A large double wardrobe often requires four to five hinges per door, whereas small compartments only need two mounting points. If you are fitting upward-opening flap doors instead of standard side-hung doors, standard hinges are replaced with gas struts for heavy flaps, where the lifting force in Newtons must be matched precisely to the flap weight.

Step-by-Step Door Fitting Guide

The following guide is based on a standard cup hinge with a 35 mm cup diameter and installation in accordance with the established System 32 standard.

Step 1: Measuring and Drilling the Cup Hole

The core part of the installation is drilling the cup hole into the back of the door with absolute precision.

Determine the vertical position: The distance from the top and bottom door edges to the centre of the cup hole is generally 100 mm to 150 mm. For doors over 900 mm in height, a third hinge should be planned exactly midway between them.
Mark the cup distance (C-dimension): This is the distance from the edge of the door to the rim of the 35 mm hole. Depending on the manufacturer and the desired gap, this dimension usually ranges from 3 mm to 6 mm. The centre point for the tip of the 35 mm Forstner bit is therefore 17.5 mm (half the diameter) plus the C-dimension. With a C-dimension of 4 mm, mark the centre at 21.5 mm from the edge.
Drill: Hold the Forstner bit perfectly upright. The drilling depth is typically 12 mm to 13 mm. Because standard chipboard panels are often 16 mm or 18 mm thick, do not drill too deep to avoid piercing through the front. A depth stop on the drill prevents errors.

Step 2: Inserting and Securing the Cup Hinge

The hinge cup is now pressed into the drilled recess.

The hinge must be aligned at exactly 90° to the door edge. A try square helps ensure accurate positioning.
Mark the fixing holes to the left and right of the cup with a bradawl.
Fasten the hinge with two countersunk chipboard screws (3.5 x 16 mm). For hinges equipped with expanding dowels or tool-free quick-release mechanisms, simply push the cup in and close the locking lever.

Step 3: Mounting the Cruciform Plate to the Carcase

The counterparts of the hinges, the mounting plates, are fastened to the inside of the carcase. In industrial manufacturing, this follows System 32.

Distance from the front edge: The standard setback for the first line of holes in the carcase is 37 mm from the front edge.
Height alignment: The height of the mounting plate must correspond precisely with the height of the hinge fitted to the door. If the cup centre on the door was measured at 100 mm from the top, the centre of the mounting plate on the carcase is also located 100 mm (minus any top door clearance gap) from the top.
The cruciform mounting plate features two fixing holes spaced vertically at 32 mm.
Secure the plate using Euro screws in pre-drilled 5 mm holes, or wood screws in 3 mm pilot holes.

Step 4: Hanging the Cabinet Door

Once all hinges are secured to the door and all plates are fastened to the carcase, the components can be joined together.

Offer the door up to the carcase in an open position.
On modern hinges with clip-on mounting, hook the front catch of the hinge arm onto the mounting plate and push the rear section until it clicks into place. An audible click confirms a secure connection.
On older slide-on models, slide the hinge arm over the mounting plate and lock it with the retaining screw.

Step 5: Adjusting the Door Gaps (3D Adjustment)

Fine-tuning the door gaps requires precision – fractions of a millimetre determine smooth movement and visual symmetry. In living room furniture, such as a TV sideboard or a low-profile TV unit, uneven gaps are immediately noticeable.

The hinge provides three adjustment axes:

Depth adjustment: Regulate the gap between the door and the carcase via the rear screw on the hinge arm or an eccentric cam. A gap of approx. 1.5 mm to 2 mm should remain so that the door does not rub against the carcase edge during opening.
Overlay adjustment (lateral adjustment): The front screw on the hinge arm shifts the door to the left or right. This aligns the gap between two doors or establishes a parallel margin with the side panel.
Height adjustment: By loosening the two fixing screws on the cruciform mounting plate (or using a separate eccentric cam on the plate), the entire door can be moved up or down by ± 2 mm.

For kitchen wall units that conceal items like an internal dish drying rack, doors must be hung perfectly plumb, as gaps at eye level are subjected to closer scrutiny.

Common Installation Mistakes

Even with the right tools, mistakes can happen that compromise the final result.

Wrong hinge crank selected: If a half overlay hinge is used for a full overlay door configuration, the door will project almost 10 mm past the carcase when closed and cannot be aligned properly.
C-dimension too small: If the cup hole is drilled too close to the edge, the door may bind against the carcase side when opening, or the edge of the panel may blow out.
Tear-out during cup drilling: A blunt bit or inconsistent pressure will tear the melamine finish. The drill should operate at high speed with moderate forward pressure.
Stripped screw threads: Overtightening chipboard screws in MDF or chipboard strips the thread, preventing the screw from holding firmly.

When assembling office furniture, cutting out a desk cable grommet is often the next step after hanging cupboard doors. Here too, sharp hole saws and accurate pilot drilling prevent damage to laminated surfaces.

FAQ – Frequently Asked Questions

How many hinges do I need for a door? The required quantity depends primarily on door height and weight. As a general guide:

Up to 900 mm height / 4-6 kg: 2 hinges
Up to 1600 mm height / 13-17 kg: 3 hinges
Up to 2000 mm height / 17-22 kg: 4 hinges
Up to 2400 mm height / over 22 kg: 5 hinges

What is the difference between soft-close and push-to-open? These are two distinct mechanisms. Soft-close refers to an integrated damper that slows down the door over the final centimetres and closes it silently. Push-to-open is an ejection mechanism designed for handleless fronts, where pushing the door pops it open. Push-to-open hinges must not have an integrated closing spring, as the spring would work against the touch-latch mechanism.

What should I do if screw holes in the carcase are stripped? If the mounting plate screws no longer grip, drill out the damaged holes to 5 mm or 8 mm. Glue in a wooden dowel or insert a threaded insert. The hinge plate can then be re-screwed securely.

Can I replace a 26 mm cup hinge with a 35 mm hinge? Not without re-machining. The cup diameter must match the door's recess precisely. A 26 mm hinge (often found on lightweight bathroom units or glass doors) uses a different drilling pattern. Enlarging a 26 mm hole to 35 mm by hand without slipping off-centre is very difficult; it requires a drill press and an alignment template.

Why is my cabinet door not closing fully? In most cases, the depth adjustment is set too tight, causing the rear edge of the door to bind against the carcase. Turning the rear adjustment screw on the hinge arm increases the door-to-carcase clearance. An incorrectly positioned cruciform plate or an obstructing internal shelf can also prevent full closure.