Adjusting Push-to-Open Catches: Setting the Trigger Stroke to Match Door Weight

A push-to-open catch requires a precisely adjusted release travel of typically 2 mm to 3 mm to match the spring force to the weight of the furniture front.

Handleless furniture fronts require precisely coordinated mechanics. The push-to-open mechanism relies on a spring-loaded plunger that is released by pressing on the door, pushing it open. An integrated magnet holds the door against the counter plate when closed. If a cabinet door or flap is too heavy, the standard release travel is often insufficient to set the mass in motion. If the travel is set too long, on the other hand, an uneven gap pattern with an excessively large front gap will result.

This guide is intended for fitters and experienced tradespeople. It explains in detail how to mechanically adjust the release travel and holding force of a magnetic touch latch correctly to ensure smooth opening.

Technical Requirements and Tools

Before adjusting or fitting the mechanism, the basic configuration of the unit must be checked. The mechanism works like a precise clockwork system – if the clearance is out by even a single millimetre, the mechanism misses or jams.

Required tools:

• Cross-head screwdriver (PZ or PH drive, matching the screws used)
• Vernier calliper or precise folding rule
• Pencil or bradawl
• Cordless drill with a drill bit (2 mm diameter for pilot drilling)

Materials:

• Touch latches (push-to-open element) including adapter plate
• Magnetic counter plate (screw-on or adhesive)
• Chipboard screws (countersunk, typically 3 mm x 15 mm or 3.5 mm x 15 mm)

The Golden Rule of Hinge Selection

A push-to-open system for doors works exclusively with unsprung hinges or special reverse-spring hinges (with a catch spring). Never use concealed hinges / cabinet hinges with soft close in combination with a touch latch. The hydraulic damping works directly against the ejection spring force. If you install standard concealed hinges / cabinet hinges, they must be unsprung.

Step-by-Step Guide: Installation and Adjustment

Correct adjustment begins with the precise positioning of the mounting plate inside the carcass.

Step 1: Determine Positioning Inside the Carcass

The touch latch is ideally fitted on the handle side of the door, opposite the hinges. For very tall or heavy doors, installation at the height of the push point (usually centrally) is recommended. Measure the edge of the carcass. The front edge of the adapter plate is usually set flush or with a defined setback (e.g. 20 mm) from the front edge of the carcass. Mark the drill holes for System 32 or the individual fixing points.

Step 2: Install the Adapter Plate and Mechanism

Pre-drill the holes minimally using a 2 mm wood drill bit to prevent the chipboard from splitting. Secure the adapter plate tightly with the appropriate screws. Ensure the plate sits at an exact 90-degree angle to the front. The cylinder of the touch latch is then clipped or slid onto the plate until it audibly clicks into place.

Step 3: Adjust the Release Travel to the Door Weight (Core Step)

Now perform the fine adjustment of the plunger. Most high-quality touch latches feature an integrated thread on the plunger head.

1. Basic setting: Turn the plunger clockwise or anti-clockwise to a medium length.
2. Define the front gap: Close the door. A gap of 2 mm - 3 mm must remain between the door and the carcass. This gap is strictly necessary, as the door must be pushed inwards by this distance to trigger the release mechanism.
3. Weight compensation: With a heavy MDF or solid timber door, the spring requires more compression travel to build up sufficient kinetic energy to push the front open. In this case, screw the plunger out slightly (anti-clockwise). The plunger becomes longer, the front gap increases minimally, but the spring force acts sooner on the door.
4. Test the release. After pressing, the door should spring open far enough to allow your fingers to easily reach behind it.

Step 4: Mount the Magnetic Counter Plate

The magnet in the plunger head requires a metallic counterpart on the inside of the door. To find the exact position, use a practical workshop trick: rub the tip of the plunger magnet lightly with a soft pencil or some chalk. Press the door firmly against the plunger. The mark will transfer to the inside of the door. Screw or adhere the counter plate precisely onto this mark. For the screw-on version, a small countersunk screw (3 mm x 12 mm) is usually sufficient.

Step 5: Fine Adjustment of the Hinges

Often, poor release is not caused by the touch latch itself, but by incorrectly adjusted hinges. Use the eccentric screws on the cruciform mounting plate of the hinges. Adjust the reveal so that the door sits parallel to the carcass when closed and does not bind. In a standard full overlay application, the door must sit cleanly over the carcass edge (taking into account the 2 mm gap for the latch).

Special Requirements for Flaps and Pull-Outs

The mechanics change when adjusting horizontal flaps instead of vertical doors. With upward-opening flaps, the front's own weight works heavily against the ejector.

This is where flap fittings come into play. When planning a heavy handleless flap, the touch latch only needs to lift the flap out of the dead centre. A gas strut then takes over the lifting work. The force of these struts is specified in Newtons (N) (e.g. 250 N). The touch latch must be adjusted so that it pushes the flap open far enough for the gas strut to begin its stroke.

With drawers, it is different: here, the mechanism is not installed as a separate pin. Instead, you use push to open drawer runners, where the trigger mechanism and spring are integrated directly into the runner (as full extension or single extension). The front gap adjustment here is usually made via small thumbwheels directly on the underside of the runner.

Common Installation and Adjustment Mistakes

Even with the correct choice of fittings, practical errors can compromise function.

1. Insufficient front gap (door jams) If the door sits flush against the carcass, the plunger has no travel left to be pressed inwards. The mechanism will not click. Solution: Shorten the plunger by screwing it in (clockwise) until the gap of 2 mm - 3 mm is achieved.

2. Incorrect combination of fittings A classic mistake is attempting to combine a push-to-open plunger with a door damper or soft-close hinges. The components will block each other. Keep these systems strictly separate.

3. Offset magnetic counter plate If the plunger and counter plate do not meet squarely, the holding force of the magnet is drastically reduced. The door may pop open on its own or fail to close flush. Repositioning the counter plate is essential. As with any magnetic catch, full surface contact is crucial.

4. Incorrect Hinge Opening Angle

A touch latch only pops the door open by a small gap. When using concealed hinges / cabinet hinges 110 degrees, the door can easily be gripped and opened fully afterwards. With specialised angles, such as concealed hinges / cabinet hinges 165 degrees (wide-angle hinges), ensure the hinge action moves smoothly without resisting the initial impulse of the plunger.

FAQ – Frequently Asked Questions on Adjustment

How far should the plunger rotate? Most models offer an adjustment range of +3 mm to -3 mm. Never force the thread beyond its noticeable stop, as this will damage the internal plastic thread.

Why does the door only open 1 cm after pressing? The touch latch is not designed to swing the door fully open. It merely overcomes the dead centre and creates a gap so your fingers can reach behind the front. If the gap is too small, wind the plunger out slightly to increase the spring stroke.

Can I retrofit push-to-open on solid wood doors? Yes, this is easily done as long as the existing hinges do not have soft-close damping. For very heavy doors (over 15 kg), choose a long-stroke touch latch, as it features a stronger spring and longer travel.

The system clicks, but the door stays shut. What should I do? In this case, the magnetic force of the counter plate is too strong or the hinges are binding. Check the gap alignment. If the door hangs crookedly, it will rub against the carcass. Readjust the hinges using the depth and height adjustment on the mounting plate.

Relevant Categories for Your Project

If you require additional furniture hardware alongside your touch latch adjustment, check the compatibility of your components. For corner solutions, specialised hinges such as concealed hinges / cabinet hinges 45 degrees or concealed hinges / cabinet hinges 90 degrees are suitable and available in unsprung versions for handleless fronts.

If you are planning wardrobe constructions with sliding elements where push-to-open cannot be used, you will find suitable hardware mechanisms within the custom sliding wardrobe doors range.