Retrofitting Magnetic Catches: Securing Springing Cabinet Doors (Compatible with Pax) with a Reliable Magnetic Latch

A magnetic catch secures springing or warped cabinet doors using the magnetic attraction between a magnet fitted to the carcass and a metal strike plate attached to the door.

When doors on a large wardrobe for 2 people keep popping open slightly after closing, it is usually due to worn spring tension in the hinges or slightly warped furniture fronts. Particularly with large-format doors made from chipboard or MDF, as commonly found on popular systems like Pax, the force of standard hinges is often no longer sufficient after a few years to keep the door flush against the carcass. A magnetic catch acts like an invisible anchor here, balancing tensile forces and keeping the front locked in the closed position.

Retrofitting requires no specialist expertise, but it does demand precise measurement and pilot drilling so that the door closes at an exact right angle without rubbing against the carcass.

Difficulty Level and Time Required

• Difficulty: Easy to moderate
• Time required: approx. 15 to 20 minutes per door
• People: 1 person is sufficient

Tools and Materials Required

For a clean and durable installation in standard engineered wood materials, you will need the following components:

• Magnetic catches including strike plate (usually supplied as a set)
• Wood screws (recommended: countersunk, dimensions 3.0 x 16 mm or 3.5 x 15 mm, drive PZ or TX)
• Cordless screwdriver with the precisely matching bit
• Wood drill bit (Ø 2 mm for pre-drilling into chipboard)
• Tape measure or folding rule
• Pencil
• Bradawl
• Optional: A piece of double-sided tape or chalk for marking

Preparation: Determining the Optimal Position

Before reaching for the drill, the ideal position for the catch must be determined. Placement depends on the type of furniture and the size of the door:

1. Tall cabinet doors (e.g. wardrobes): On doors from 1500 mm in height, the material often warps at the outer ends. Fit the catch either at the top or bottom corner area of the handle side (opposite the hinge side). If warping is severe, two catches (top and bottom) may be necessary.
2. Low furniture: On a TV sideboard or a TV lowboard, a single catch placed centrally on the handle side or in the upper third is generally sufficient.
3. Damp rooms and kitchens: On wall cabinets exposed to moisture—for example, where a dish drainer for wall cabinet is integrated inside—the wood swells minimally and alters gap dimensions. Here, the catch should be mounted as far away from the moisture source as possible, usually on the upper carcass ceiling.

Step-by-Step Installation Guide

The following guide relates to a standard door with a full overlay (the door rests on the carcass side panels when closed).

1. Calculate and Mark the Setback Dimension

The magnet must not sit flush with the front edge of the carcass. It must be set back by the thickness of the strike plate so that the door closes flush later.

• Measure the thickness of the strike plate (usually 1.5 mm to 2.0 mm).
• Add a clearance tolerance of 1.0 mm.
• Using a pencil, draw a line parallel to the front edge of the carcass, offset inwards by exactly this value (e.g. 3.0 mm). The front edge of the catch's plastic housing will align with this line.

2. Mark and Pilot-Drill Holes on the Carcass

Hold the magnetic catch against the marked line. Mark the screw hole positions with the bradawl. Drill the pilot holes approx. 10 mm deep using the 2 mm wood drill bit. Pre-drilling is essential, as driving screws into or near the edge of chipboard without pilot holes causes the material to split.

3. Fit the Magnetic Catch

Fasten the housing securely with the matching wood screws. Preferably use screws with a TX drive (Torx), as these provide better torque transfer without slipping in tight cabinet interiors. Tighten the screws hand-tight. If the catch features a slotted hole, position the screw in the centre to allow room for fine adjustment later.

4. Determine the Strike Plate Position on the Door

This is the most error-prone step, as the strike plate must meet the magnet precisely to achieve its full holding force (in kilograms).

• The tape trick: Place the strike plate onto the magnet already mounted on the carcass. Apply a small piece of double-sided adhesive tape to the back of the strike plate. Carefully close the door and press firmly in the area of the catch. Open the door again. The strike plate will now be stuck in the exact installation position on the inside of the door.
• The chalk trick: Alternatively, mark the contact tips of the magnet with chalk or a soft pencil, close the door, and press. The mark reveals the exact centre point for the strike plate.

5. Screw the Strike Plate in Place

Mark the drilling point through the hole of the strike plate. Pay very close attention to the length of the screw. If the furniture door is 16 mm thick, the screw (including the thickness of the strike plate) must not exceed 14 mm in length. Pre-drill here with 2 mm as well, but to a maximum depth of 10 mm. Use a drill depth stop or mark the drilling depth with tape on the drill bit to avoid drilling through the front. Screw the plate into position.

6. Fine Adjustment and Testing

Close the door. Inspect the alignment and gaps from the outside.

• If the door protrudes slightly on the catch side, loosen the screws on the carcass slightly and slide the catch back by 1 mm to 2 mm in the slotted hole.
• If the door hits the carcass abruptly before the magnet engages, move the catch further forward.

Common Installation Mistakes

• Incorrect screw selection: Screws that are too thick (e.g. Ø 4.5 mm) will split the core material. Screws that are too long will pierce through the front panel. Consistently use Ø 3.0 mm or Ø 3.5 mm.
• Internal obstruction: Before installation, check whether internal drawers, pull-outs, or shelves will be obstructed by the catch. On office furniture, ensure that wiring runs routed towards a desk cable grommet are not pinched.
• Ignoring hinge adjustment: A magnetic catch cannot correct completely misaligned hinges. Adjust the reveal gaps (height, lateral, and depth) correctly via the adjustment screws on the concealed cup hinge before fitting the catch.
• Rigid strike plates on twisted doors: If the door is slightly warped, the strike plate will not meet the magnet flat. The holding power drops drastically. The solution is to mount the strike plate with a small amount of play (do not over-tighten the screw fully), allowing the plate to pivot and adapt to the angle of the magnet.

Frequently Asked Questions (FAQ)

How much holding force does a magnetic catch need? For standard chipboard furniture doors (up to 1000 mm high), a holding force of 3 to 4 kg is completely adequate. For heavy, full-height wardrobe fronts (such as the Pax system) or solid wood doors, models with 5 to 6 kg holding force should be chosen. An overly powerful magnet (above 10 kg) forces you to pull forcefully on the door, which will loosen the screws from the MDF over time.

Can magnetic catches be used on upward or downward opening flaps? Yes, although they only serve to hold the flap in its closed position. They do not replace load-bearing fittings. For heavy upward-opening flaps, the weight must be supported by a gas strut for heavy flaps. The magnet merely ensures that the flap closes flush at the bottom.

Do magnetic catches work alongside soft-close hinges? This is technically possible, but requires precise coordination. The damper inside the cup hinge brakes the door over the final centimetres. The magnet must be strong enough at that exact moment to overcome the resistance of the damper and pull the door completely shut. It is often more practical to deactivate the damper on one of the hinges (if the model permits) when retrofitting a magnetic catch.

Why is it not enough simply to readjust the hinges? When doors spring open, it is usually due to fatigue in the retaining spring inside the hinge mechanism. This spring cannot be retensioned. While you can move the door closer to the carcass using depth adjustment, the inherent tension of the door pushes it open again due to the lack of spring force. The only solutions are replacing the entire hinge or carrying out a quick, cost-effective retrofit with a magnetic catch.