Magnetic Catch Holding Force: Which Catch for Which Door Size?

The holding force of a magnetic catch determines how much pulling force in kilograms is required to separate the magnetic connection between the catch housing and the counterplate.

Selecting the right magnetic catch plays a crucial role in the operation of a cabinet door. If the magnet is too weak, the door pops open at the slightest vibration or due to internal tension from the hinges. Conversely, if the holding force is too strong, the front becomes difficult to open, placing unnecessary strain on the hinges or pulling fixing screws out of the carcass over time. Much like a precisely adjusted clamp during gluing, the magnet must be matched accurately to the leverage and weight of the door.

This guide is intended for fitters and joiners who need to select magnetic catches based on strict technical criteria such as door dimensions, material, and mounting type.

Key Buying Criteria for Magnetic Catches

When planning a piece of furniture or replacing worn hardware, several parameters must be considered to ensure a clean, reliable closing action.

Holding Force in Kilograms (kg)

The holding force of magnetic catches is typically stated in kilograms. It defines the resistance that must be overcome to open the door. The range extends from a light 2 kg for small flaps up to over 15 kg for heavy, full-height doors. The required force depends on the door surface area, material weight (for example, heavy MDF compared to lighter chipboard), and the type of hinges installed.

Housing and Counterplate Material

The catch housing is usually manufactured from plastic or metal. A metal magnetic catch offers higher mechanical resilience and is commonly used in commercial applications or for heavy fronts. Plastic housings are the standard in furniture making and are entirely sufficient for standard cabinet doors. The counterplate (the strike plate attached to the door) is always made from a ferromagnetic metal.

Adjustability

High-quality catches feature an elongated slot in the mounting plate. This allows the installer to adjust the depth of the magnet by 2 mm to 3 mm after screwing it in place. This ensures the reveal of the closed door can be aligned precisely with the adjacent carcass.

Types and Options Overview

Depending on the furniture construction, different latching mechanisms are utilised.

• Standard Magnetic Catches: The classic catch. The housing is screwed into the carcass, and the counterplate onto the door. Opening requires a conventional furniture handle.
• Magnetic Push-to-Open Latches: This variant is used for handleless fronts. The magnet keeps the door held against the carcass when closed. A light push on the front triggers a spring mechanism that pushes the door open by a few centimetres. Important: This system strictly requires hinges without a closing spring.
• Self-Adhesive Magnetic Catches: For glass display cabinets or very thin metal fronts where drilling is not possible, catches with heavy-duty industrial adhesive tape are used. Here, the effective holding force is often limited by the adhesive strength on the surface.
• Recessed Magnetic Catches: For a flush aesthetic, the magnet is set directly into a matched drill hole in the carcass end. The counterplate is rebated into the door.

Which Catch for Which Door Size?

The following guide helps determine the correct holding force for typical cabinetmaking installations.

Light Flaps and Small Doors (up to 400 mm Height)

For small wall units, miniature pull-out units, or inspection hatches, a holding force of 2 kg to 3 kg is completely sufficient. A stronger magnet would cause the entire cabinet to shake when pulling the handle before the door releases.

Standard Cabinet Doors (400 mm - 1000 mm Height)

For classic kitchen wall cabinets, chests of drawers, or sideboards, a holding force of 4 kg to 6 kg is the industry standard. This rating keeps the door reliably closed even if the hinges generate slight counter-tension. Magnetic catches in black or white are frequently selected here to coordinate visually with the interior carcass decor.

Heavy Furniture Doors and Special Applications (from 1000 mm Height)

For large wardrobe doors, solid timber doors, or larder units, a holding force of 10 kg to 15 kg is required. For doors measuring 1500 mm in height or more, it is also recommended to install two magnetic catches (one in the upper third, one in the lower third) to prevent the front from warping. Heavy-duty metal magnetic catches are also used when retrofitting balcony doors that only need to be pulled shut from the outside without locking, as they must withstand wind pressure.

Installation Advice: How to Mount Magnetic Catches Correctly

Correct positioning and mounting are critical to ensure the counterplate sits flat against the magnet. Maximum holding force is achieved only with full-surface contact.

Tools Required

• Cordless drill driver
• Matching bits (PZ or TX, depending on the screw)
• Bradawl or small prick punch
• Tape measure and pencil
• Wood screws and furniture screws (typically 3 x 15 mm or 3.5 x 16 mm countersunk)

Installation Steps

1. Determine the position: The catch is usually mounted on the side opposite the hinge. On standard doors, it is ideally placed in the top or bottom corner to maximise leverage.
2. Screw the housing into place: Place the housing flush with the front edge of the carcass. Use the bradawl to mark the pilot holes through the elongated slot. Screw the housing in place, but do not tighten the screws fully yet.
3. Mark the counterplate: To find the exact position for the counterplate on the inside of the door, use a handy workshop trick: rub the contact face of the magnet lightly with chalk or a soft pencil. Close the door and press it firmly against the catch. The chalk will transfer onto the inside of the door, marking the precise location.
4. Fasten the counterplate: Screw the metal counterplate securely onto the marked spot. Ensure the screw length does not pierce the front face of the door.
5. Fine adjustment: Close the door and inspect the alignment. If the door protrudes or sits too deep in the carcass, loosen the screws on the catch housing slightly, shift it within the elongated slot to the desired depth, and tighten the screws fully.

Interaction with Other Furniture Fittings

A magnetic catch does not work in isolation; it must harmonise with the rest of the furniture hardware.

If you are using concealed hinges with integrated soft-close damping, a magnetic catch is generally redundant and often counterproductive. The damper relies on the natural momentum of the closing door to compress the hydraulic cylinder smoothly. A magnet pulls the door abruptly over the final few millimetres, disrupting the soft-close action. For doors that slam hard, standalone door dampers should be installed instead.

The same principle applies to lockable cabinets. When a furniture cylinder lock is fitted, the bolt holds the door shut. An additional magnet is only useful here if the door needs to remain closed while unlocked.

Frequently Asked Questions (FAQ)

Why does my door not close flush despite having a magnetic catch?

In most cases, the counterplate is not making flat contact with the magnet. This happens if the counterplate was screwed on crooked or if the door hinges are out of alignment. An angular deviation of just 1 mm reduces magnetic holding force dramatically. Adjust the hinges or modify the catch depth using the elongated slot.

Can I retrofit a magnetic push-to-open latch to any hinge?

No. Push-to-open latches strictly require unsprung concealed hinges (free-swinging hinges) or reverse-spring hinges. Standard sprung hinges pull the door shut over the final centimetres, which blocks the release mechanism of the push latch.

How do I remove a self-adhesive magnetic catch without leaving residue?

Carefully warm the catch housing using a heat gun or hairdryer. The heat softens the industrial adhesive. You can then pry off the catch using a flat putty knife. Any remaining adhesive residue can be removed with isopropanol or adhesive remover.

Is there a difference between magnetic catches for wooden and glass doors?

Yes. On wooden doors, the counterplate is screwed in place. Glass doors (such as in display cabinets) require specialised counterplates designed as a U-profile that slides over the edge of the glass and clamps tight with a small grub screw (typically fitted with a plastic buffer). The holding force of the magnet remains identical.

Matching Products for Your Project

To ensure a robust and long-lasting installation, every component must integrate seamlessly. Alongside magnetic catches, you will find all the matching components for professional furniture assembly across our ranges:

• To mount housings and strike plates securely, select suitable wood screws and furniture screws.
• For constructing handleless fronts, combine push latches with concealed fasteners from our furniture connectors range.
• If you prefer mechanical deceleration over magnetic latches, explore our collection of door dampers.
• To complete the look of your cabinet fronts, explore our wide selection of classic hardware in the furniture handle section.