Push-to-Open Door Catches with or without Magnet: Differences and Applications

A push-to-open door catch with a magnet strictly requires hinges without a closing spring, whereas the rubber buffer version must only be combined with standard sprung hinges.

Mechanics and Function of Handleless Fronts

Handleless furniture designs require specialised fitting technology to ensure the smooth opening and closing of doors and drawers. When classic modern furniture handles are omitted, a push-to-open mechanism is generally used. For cabinet doors, this task is performed by a push-to-open door catch (also known as a tip-on or push latch).

The mechanical principle is based on a pre-tensioned spring inside the housing. By applying light pressure to the front, the catch is released and the plunger pushes the door open. The system operates like a mechanical shock absorber in reverse: it absorbs kinetic energy and releases it as an ejection force. For the installer or joiner, the critical decision during planning concerns the plunger tip design: magnet or buffer. The choice depends directly on the type of concealed cabinet hinges fitted.

Key Buying Criteria: Dimensions, Stroke, and Holding Force

When selecting the appropriate ejector, technical parameters must be matched precisely to the geometry and weight of the furniture door.

• Ejection distance (stroke): This value in millimetres indicates how far the door is pushed open. Standard values are around 20 mm for small flaps or lightweight doors. For heavy or wide fronts, a long stroke of 37 mm to 40 mm is necessary to provide a gap large enough to reach behind the door with your fingers.
• Door gap (trigger travel): For the mechanism to trigger, the door requires rearward movement. The front gap must strictly be between 1.5 mm and 3 mm. If the door rests tightly against the carcass, the trigger will jam.
• Drill diameter: For concealed installation (drilling into the carcass edge), a hole diameter of 10 mm is usually required. The drilling depth depends on the length of the housing (typically 50 mm to 75 mm).
• Mounting type: Alongside the drill-in variant, adapter plates exist for cross-mounting or linear mounting. These are screwed to the inside of the carcass and frequently utilise System 32 (32 mm hole spacing).

Overview of Types: With Magnet vs With Buffer

The mechanical difference in the plunger tip defines its area of application. An incorrect combination of catch and hinge inevitably leads to door malfunctions.

Push-to-Open Door Catches with Magnet

This design features an integrated magnet at the tip of the plunger. A metal counterplate (typically adhesive or screw-mounted) is fitted directly opposite on the inside of the furniture door. The magnet's task is to keep the door held against the carcass when closed. This is strictly required because these catches are paired with hinges that lack an integrated closing spring (known as unsprung or free-swinging hinges). Without the magnet, the door would permanently rest slightly ajar, as the hinge provides no pulling force towards the carcass.

Push-to-Open Door Catches with Rubber Buffer

In this variant, the plunger tip consists of a soft plastic or rubber buffer. There is no magnetic attraction here. These catches are installed when the door is held by standard hinges with an integrated closing spring. The hinge spring pulls the door against the carcass and keeps it shut. When closing, the push-to-open catch must be tensioned against this spring force. The rubber buffer prevents damage to the inner front face and provides a non-slip contact point during ejection.

Special Case: Runners and Drawers

For drawers, separate push catches are generally not screwed to the carcass side wall. Instead, the mechanism is integrated directly into the runner. When planning handleless drawers, you need dedicated push-to-open drawer runners. Lengths typically vary from 250 mm - 600 mm. For drawers, it must also be noted that push-to-open and soft-close damping are opposing forces. A pure push-to-open full-extension runner does not feature soft-close damping. Anyone wanting both must rely on complex hybrid systems that mechanically tension the ejection yet gently cushion upon closing. Those fitting conventional handles, on the other hand, choose regular soft-close drawer runners.

Which Push-to-Open Catch for Which Case? (Decision Guide)

Correct selection depends strictly on the existing or planned hardware:

• If you use standard sprung hinges: Choose the push-to-open catch with a rubber buffer. The hinge spring (e.g. a standard 110-degree concealed cabinet hinge) keeps the door closed.
• If you use unsprung hinges: Choose the push-to-open catch with a magnet and mount the counterplate on the door.
• If you fit heavy MDF or solid wood fronts: Choose a model with a long stroke (at least 37 mm ejection distance) and a strong ejection spring.
• If you want an unobtrusive look: Choose the drill-in variant (10 mm diameter). This requires a carcass side thickness of at least 16 mm, preferably 19 mm, to prevent tear-out in the chipboard.
• If you are retrofitting existing cabinets: Use surface-mounted adapter plates. This requires no precise edge drilling and can be achieved with simple wood screws (PZ or TX drive, 3.5 mm diameter).

Installation Advice for Push-to-Open Catches

The positioning of the catch is crucial for leverage. It should always be installed on the handle side of the door (opposite the hinges). For tall doors, installation at the height of the push point is recommended, ideally centred vertically.

Required tools:

• Cordless screwdriver
• Wood drill bit (10 mm diameter for drill-in models, 3 mm diameter for pre-drilling the adapter plate)
• Screwdriver or bit set
• Rule and pencil

Step-by-step (surface-mounted installation):

1. Determine the position: Mark the location on the inside of the carcass. Pay attention to the required gap. When retracted, the plunger must still have approx. 2 mm to 3 mm clearance to the closed door.
2. Screw on the adapter plate: Pre-drill the holes lightly using a 3 mm drill bit and secure the base plate with countersunk screws.
3. Clip on the housing: Slide or clip the push-to-open catch housing onto the adapter plate.
4. Fine adjustment: Many models allow depth adjustment of +3 mm / -3 mm by rotating the plunger. Adjust the plunger so that the door sits flush with adjacent fronts while ensuring the trigger mechanism clicks reliably.
5. Counterplate (magnetic version only): Close the door lightly to mark the magnet contact point on the inside of the front. Stick or screw the metal counterplate firmly into position.

Frequently Asked Questions (FAQ)

Can I combine push-to-open with soft-close hinges?

No, this is generally technically unfeasible. Soft-close concealed cabinet hinges slow down the closing action. However, a push-to-open catch requires momentum when closing to re-tension the spring for the next opening cycle. The damping action prevents the mechanism from engaging. Use only unsprung or standard undamped hinges for handleless doors.

Why is my door not closing properly with a push-to-open catch?

There are usually two reasons: either the door gap is set too small, preventing the plunger from being pushed in far enough to latch, or a magnetic catch has been used with a strongly sprung hinge, causing the mechanical forces to work against each other. Adjust the plunger by rotating it (depth adjustment) further into the housing.

What is the difference between a push-to-open catch and a magnetic catch?

A magnetic catch is a purely passive component. It holds a door closed solely by magnetic force, but lacks a spring and an ejection mechanism. To open a door fitted with a magnetic catch, a handle is essential on the front to pull it open. In contrast, a push-to-open catch actively ejects the door, removing the need for a handle.

How large must the gap between the carcass and door be?

For the trigger mechanism to function smoothly, a gap (clearance between the front edge of the carcass and the inside of the door) of 2 mm to 3 mm is strictly required. This travel is needed to push the plunger past its dead centre and release the spring.

Do I also need separate push catches for drawers?

No. For pull-outs, the push-to-open mechanism is not screwed to the carcass as an individual component. The functionality is integrated directly into the profile of the under-mount or ball-bearing runner. When purchasing drawer runners, you must explicitly select models with an integrated push-to-open system.