Replacing Magnetic Catches: Swapping Faulty Catches for a Precision Alternative to Hettich

May 23, 2026

A magnetic catch keeps furniture doors closed via a magnetic field; when replacing it with an alternative to Hettich, the hole spacing in millimetres and the holding force determine the exact fit.

Replacing a defective magnetic catch is one of the classic maintenance tasks in furniture and interior fitting. After years of use, the plastic housings of the original Hettich catches often break, or the magnet loses strength due to mechanical impacts. Because manufacturers change their serial numbers and moulds over the years, searching for an identical spare part is often time-consuming. The more efficient solution for fitters and skilled tradespeople is selecting a precisely fitting alternative based on technical dimensions.

This guide explains in detail how to determine the relevant parameters, remove the old catch, and correctly adjust the new component. The difficulty level of the installation is low, taking about 10 to 15 minutes per door.

Required Tools and Materials

For a professional replacement, you do not need specialist tools, but rather precise measuring instruments to avoid tolerances during installation.

Vernier calliper: Essential for the exact determination of hole spacings and housing dimensions in millimetres.
Cross-head screwdriver: Type PZ1 or PZ2 (Pozidriv), suitable for standard chipboard screws.
Bradawl or piercing awl: For marking and piloting new drill holes in engineered wood.
Wood screws: Typically countersunk screws with a diameter of 3 mm or 3.5 mm (length depends on the material thickness, usually 15 mm).
Replacement part: A new magnetic catch complete with a metallic counterplate.

Preparation: Determining the Crucial Dimensions

Before installing the replacement part, you must take the dimensions of the old Hettich catch. Do not rely on embossed numbers on the plastic housing – these often only designate the injection moulding tooling and are not reliable part numbers.

Instead, measure the hole spacing. This is the distance from the centre of the left screw hole to the centre of the right screw hole. In modern furniture construction, this spacing is frequently based on the System 32, making values such as 32 mm very likely. In addition, measure the depth of the housing to ensure that the new component does not collide with shelves.

Finally, the holding force is relevant. For lightweight furniture doors, a force of 3 kg to 4 kg is sufficient. For solid cabinet doors or doors with a heavy tare weight, models with 5 kg to 6 kg should be chosen.

Step-by-Step Guide: Replacing a Magnetic Catch

The following guide takes you through the entire removal and new installation process.

Step 1: Removing the Defective Catch

Undo the fixing screws of the old housing in the cabinet carcass. Turn the screws out with gentle pressure to avoid stripping the thread in the chipboard. Remove the housing and clean the mounting surface of dust and wood shavings.

Step 2: Removing the Counterplate

The metallic counterplate is located on the inside of the furniture door. Loosen the screw here as well. Often this plate is fixed with a small prong in the wood to prevent twisting. If necessary, lever the plate off carefully using a flat-head screwdriver.

Step 3: Dimensional Check and Hole Preparation

Hold the new catch up to the position of the old component. If the hole spacing matches, you can use the existing drill holes. If the spacing differs, new holes must be marked. Use the bradawl to define the position precisely. Pre-drilling with a 2 mm wood drill bit prevents melamine-coated chipboard from splitting.

Step 4: Installing the New Housing

Position the new housing and drive the screws in finger-tight. Many modern catches feature a slotted hole. Do not tighten the screws completely at first, but leave the housing about 1 mm to 2 mm of depth play. This is required for subsequent fine adjustment.

Step 5: Securing the New Counterplate

Fit the new counterplate to the door. It is essential to ensure that you use a countersunk screw and that it sits flush with the plate. If the screw head protrudes, the plate cannot sit flat against the magnet. Like a key in a lock, the counterplate must dock precisely and flush against the magnet to develop its maximum holding force.

Step 6: Fine Adjustment and Functional Test

Close the cabinet door. Check whether the door sits flush with the carcass. If the door stands proud, open it again, push the catch housing back slightly within the slotted hole, and now tighten the screws firmly. If the door closes too deep, adjust the housing forward.

Excursus: Systematically Upgrading Cabinet Doors and Drawers

When carrying out maintenance work on cabinets or desks, it is an ideal opportunity to check and, if necessary, upgrade all the furniture fittings across the unit.

Frequently, it is not only the door catches that are defective, but also the drawer runners that are outdated. Switching to full extension drawer runners allows the drawer to be pulled out 100% from the carcass, making access to the entire contents easier. For a concealed look where the mechanism sits invisibly under the wooden base, undermount drawer runners are used.

If the piece of furniture is to be designed completely handleless – similar to a door held only by a magnet – push to open drawer runners are ideal. A gentle press on the front is enough to eject the drawer. For heavy contents such as tools or files, pay attention to the load capacity in kilograms and use heavy duty drawer runners if required.

In office furniture or media consoles, cable management also plays a central role. When repairing cabinet doors for multimedia equipment, you should also optimise the cable routing. Cable grommets are suitable for this purpose. For workstations, a specific desk cable grommet is practical. Depending on the furniture design, you can choose between a metal cable grommet for high stability or a discreet black cable grommet.

Interplay with the Concealed Hinge

A magnetic catch can only function properly if the door hinge is adjusted correctly. If the door pops open by itself, this is not always due to a weak magnet, but often to a poorly adjusted concealed hinge.

Check whether the door is under tension when closed. On a standard hinge with an opening angle of 110°, depth, height, and side overlay can be adjusted via the adjustment screws on the hinge arm. Pay attention to the application type: a full overlay requires different gap dimensions than an inset door. If the hinge mechanically pushes the door away from the carcass, even the strongest magnet cannot compensate for this force over time. Adjust the concealed hinge so that the door rests against the carcass without tension when closed.

Common Installation Mistakes

Using the wrong screw heads: If a round-head screw is used for the counterplate instead of a countersunk screw, a gap is created between the magnet and the metal. The magnetic field is drastically weakened.
Crooked installation: If the housing does not sit at an exact 90-degree angle to the counterplate, the components only touch at one edge. Here too, a large portion of the holding force is lost.
Stripped drill holes: If the old screw holes in the chipboard are worn out, the new screws will spin freely. Gluing in a small wooden dowel or using repair putty before driving in the new screw provides a solution.

FAQ – Frequently Asked Questions

Are magnetic catches and push-to-open the same thing? No. A magnetic catch attracts the door and holds it shut. A push-to-open mechanism (also called tip-on) is a spring mechanism that actively pushes the door open following a light press on the front. They are two opposite operating principles.

How do I find the correct Hettich spare part number? The numbers embossed on the plastic parts are usually production or moulding numbers and rarely help when searching for spare parts. Rely exclusively on physical dimensions: hole spacing (in mm) and overall height.

Can I use a magnetic catch on lift-up flaps? Magnetic catches are unsuitable for upward-opening flaps because they cannot hold the weight of the flap. A gas strut is required for this. The force of these stays is specified in Newtons (N). For example, a 380 N model holds significantly heavier flaps than a 250 N model.

Why is the new magnet not holding the door properly? Check the alignment. If the counterplate does not make full contact with the magnet, the force is reduced. Also ensure that the hinge is not pushing the door away from the carcass due to an incorrect depth setting.