How to Align Magnetic Catches Correctly: Positioning the Strike Plate for Maximum Holding Power

January 21, 2026

A magnetic catch only achieves its maximum holding power when the metallic strike plate rests completely flat and centred against the pole pieces of the magnet housing.

Even a minimal air gap or an angular misalignment between the magnet and the metal plate drastically reduces the holding force in Newton. For joiners and fitters, the exact alignment of these components is not a minor detail, but the fundamental prerequisite for a properly functioning furniture door. Precision during installation is especially crucial for handleless fronts or lightweight flaps to ensure clean closure.

This guide takes you through the professional installation process, exact measurement calculations, and troubleshooting for insufficient closing force.

Preparation: Getting the Basics Right

Before installing a catch, the geometry of the door must be correct. A common mistake is attempting to use a strong magnet to force a warped or poorly adjusted door into the carcass. This will not work in the long run.

First, check the hinges. If you are using classic concealed hinges, they must be adjusted beforehand across height, depth, and overlay via the cross mounting plate. Only when the gap reveals are consistent and the door rests against the cabinet without tension can the magnet do its job. An overlay door behaves differently to an inset door, as inset fronts must sit flush with the front edge of the carcass. Here, the magnet often doubles as a depth stop.

Tools and Materials Required

For professional installation, you will need the following tools:

Selected magnetic catches with matching strike plates
Bradawl for marking pilot holes
Screwdriver or cordless drill with the exact matching bit (usually PZ or PH)
Folding rule and try square
Double-sided adhesive tape or some chalk (for the marking trick)
Suitable wood screws (often 3 x 16 mm or 3.5 x 15 mm)

Step-by-Step Guide: Aligning Magnetic Catches Correctly

Installation is divided into two main phases: first, the magnet housing is fixed to the carcass, then the position of the metal plate is transferred to the door.

1. Determine the Position of the Magnet Housing

Choose the position on the cabinet carcass. On a standard cabinet door, the magnet is usually fitted at the handle-side corner, either at the top or bottom of the carcass. Ensure that the magnet does not foul any shelves or shelf supports & brackets.

Measure the setback. If the door is to sit flush against the carcass, the front edge of the magnet must be set back by exactly the thickness of the strike plate. If the strike plate is 1.5 mm thick, the magnet housing is screwed in exactly 1.5 mm behind the front edge of the carcass. For an inset door, add the door thickness (e.g. 19 mm door + 1.5 mm plate = 20.5 mm setback).

2. Mount the Magnet Housing

Mark the fixing holes of the housing with the bradawl. This prevents the screw from wandering in hard melamine resin or chipboard. Use round-head or pan-head screws, as a countersunk head could crack the plastic housing of the magnet. Tighten the screws hand-tight. Many housings feature slotted holes – position the screw in the centre of the slotted hole to leave 1 mm to 2 mm of play for fine adjustment later.

3. Find the Exact Point for the Strike Plate

Now comes the most critical step. Like a stamp that must hit its pad precisely, a magnetic system forgives no lateral offset. To determine the position of the strike plate on the inside of the door with millimetre accuracy, there are two proven workshop methods:

Method A: The Tape Trick (Highest Precision) Stick a small piece of double-sided mounting tape to the front face of the metal plate. Place the metal plate squarely onto the mounted magnet inside the cabinet. Carefully close the door until it sits flush, and press firmly against the front at the height of the magnet. Open the door again. The metal plate will detach from the magnet and remain stuck in the exact correct position on the inside of the door.

Method B: The Chalk Trick (For Rough Surfaces) Lightly coat the edges of the metal plate with chalk or a soft pencil. Place the plate onto the magnet and press the door shut. The chalk leaves a faint imprint on the inside of the door, marking the outer contours of the plate.

4. Fasten the Strike Plate

Once the position is marked (or the plate is temporarily held by the adhesive tape), make a pilot mark for the screw using the bradawl.

Here, the choice of screw is critical: the strike plate strictly requires a countersunk screw. The screw head must sit completely flush within the countersink of the metal plate after driving it in. If the screw head protrudes by even 0.5 mm, the magnet will hit the screw head instead of the plate. The result: an air gap is created and holding force drops to a fraction of its capacity.

Professional Tip for Fastening: Do not over-tighten the screw on the strike plate with excessive force. If the plate is rigidly fixed and does not sit 100% flat, the magnet will only grip on one edge. Leave the screw a quarter turn loose. This gives the metal plate minimal play, allowing magnetic attraction to pull it completely flat against the pole pieces when the door closes.

5. Fine Adjustment and Final Inspection

Close the door. It should engage with a crisp, audible click. Check the gap between the door and carcass.

Does the door stand slightly proud on the magnet side? Loosen the screws of the magnet housing in the slotted holes slightly and slide the housing 1 mm backwards.
Does the door have play and rattle when closed? Slide the housing 1 mm forwards.

Common Installation Errors

Even with careful workmanship, small discrepancies can impair performance. Watch out for these typical mistakes:

Error 1: Hinges pulling against the magnet If the concealed hinges are adjusted so that they mechanically push the door open, the magnet must constantly work against this spring force. Adjust the hinges so that the door rests free of tension when closed.

Error 2: Incorrect screws for the strike plate As mentioned, a protruding screw head is the enemy of magnetic force. Run a finger over the plate to check that the screw is genuinely flush with the metal. If in doubt, replace a 3.5 mm screw with a 3.0 mm version if the head is too large.

Error 3: Incorrectly sized magnetic force A small catch with 20 N holding force is sufficient for a lightweight MDF flap, but will be overwhelmed by a solid oak door on a TV lowboard unit. Choose the pull force according to the door weight. For tall doors (e.g. from 800 mm height upwards), it is often more effective to install two magnetic catches (one at the top, one at the bottom) rather than placing a single, extremely strong magnet in the middle.

Special Applications in Furniture Construction

Magnetic catches are not only relevant for standard hinged doors. In flap constructions, such as a wall cabinet dish drainer in the kitchen, magnets secure the flap in the closed position.

On upward-opening flaps, magnets often work in conjunction with a flap stay. While the stay holds the flap open, the magnet at the bottom ensures a flush closed fit. For very heavy fronts, gas struts for heavy flaps are typically used, using their kinematics to keep the flap closed on their own. Here, a magnet serves at most as an additional catch or stop buffer.

Magnets are also useful in office furniture. For example, when using connectors & brackets to construct access panels on desks (such as concealing a desk cable grommet), low-profile magnetic catches offer the most discreet solution for maintenance access.

FAQ – Frequently Asked Questions About Magnet Installation

Why does the magnet not hold the door even though they touch? In most cases, the metal plate is not sitting flat. An angular offset of just 2° or a protruding screw head creates an air gap. Magnetic force decreases with the square of the distance – a gap of even 1 mm ruins the holding effect. Loosen the screw on the strike plate slightly so it can self-align.

How much holding force (in Newton) do I need for my cabinet door? For lightweight doors on chest of drawers, 15 N to 20 N (approx. 1.5 kg to 2 kg pull force) is sufficient. For standard wardrobe doors or kitchen wall units, 30 N to 40 N is ideal. Heavy solid wood doors require 40 N to 60 N.

Can I glue the strike plate instead of screwing it? On very thin fronts (e.g. glass or thin acrylic), screwing is impossible. Special self-adhesive strike plates are available for this purpose. Use high-grade industrial double-sided tape. The bonding surface must be thoroughly degreased with alcohol beforehand, otherwise the pulling force of the magnet will peel the tape off over time.

The screw is spinning freely in the chipboard, what now? If the screw hole in the carcass is stripped, the magnet housing will no longer hold. Drill out the hole with a 5 mm drill bit, glue in a standard wooden dowel, and trim it flush. Once dry, you have solid wood again for the screw to grip securely.