Installing Push-to-Open Fittings: How to Mount Touch Latches for Handleless Fronts in System 32

A push-to-open fitting is a spring-loaded touch latch that unlocks handleless furniture fronts with a light press on the surface, popping them open by a small gap.

The trend towards minimalist, handleless furniture designs requires precise coordination of mechanical components. When cabinet doors or drawers are planned without visible handles or profile strips, the touch latch (also known as tip-on) takes over the opening function. Installing these release systems demands exact workmanship, as the mechanism only triggers reliably within narrow tolerances. System 32 in particular provides the ideal foundation for positioning fittings accurately and reproducibly within the cabinet carcase.

This guide is aimed at fitters and experienced furniture makers. It details the professional installation of screw-on touch latches, the adjustment of the release gap, and the essential compatibility rules regarding the hinges used.

Operating Principle and Technical Requirements

The mechanism operates similarly to the clicker mechanism in a ballpoint pen: pressing inwards tensions and locks the pin, while the next press releases the spring force and pushes the element forward.

For this process to function smoothly on a cabinet door, the door must first be able to be pushed inwards by the release travel distance (usually 2 mm - 3 mm). If the door is mounted flush against a hard stop and cannot be pressed further into the carcase, the mechanism will jam.

Furthermore, hinge selection is crucial. A touch latch must never be combined with soft-close hinges. The damping mechanism (often called soft-close) actively pulls the door shut over the final few centimetres and holds it closed. The push-latch, however, pushes in the opposite direction. These opposing forces lead to malfunctions and long-term wear on both components. For handleless doors, concealed cup hinges / cabinet hinges without a catch (unsprung) are strictly required. Only then can the latch push the door open freely after unlocking.

Required Tools and Materials

For the proper installation of a screw-on release system inside the carcase, the following tools and materials are required:

• Touch latch (consisting of a linear adapter plate and the actual push-to-open release unit)
• Cordless drill/driver with torque control
• Wood drill bit with centring tip (5 mm diameter for Euro screws or 3 mm for pre-drilling chipboard screws)
• Try square and pencil
• Matching driver bits: PZ (Pozidriv) or TX (Torx) in size 15 or 20
• Drilling template (optional, but recommended for System 32)
• Counterplate (magnetic or adhesive, depending on the latch type)

Step-by-Step Guide: Installing a Touch Latch

The following guide covers the classic cross mounting plate or linear adapter plate screwed to the inside of the cabinet carcase.

Step 1: Determine Positioning in System 32

System 32 is the international standard in furniture construction. It defines a hole-spacing grid of 32 mm and a setback distance of exactly 37 mm from the front edge of the carcase to the front row of holes.

1. Choose the mounting height. The touch latch should ideally be placed where the user intuitively presses against the front. For standard base units, this is usually the upper third; for wall cabinets, the lower third.
2. Ensure that the fitting is installed on the opening side (opposite the hinges). Mounting close to the hinge axis reduces leverage and requires excessive pressure to trigger.
3. Use the existing 5 mm hole line. Most manufacturers' adapter plates are engineered to align with the 32 mm grid.

Step 2: Screw on the Adapter Plate

The adapter plate (base plate) forms the foundation and must sit perfectly parallel to the front edge of the carcase.

1. Position the adapter plate against the hole line. The distance from the centre of the drill hole to the front edge of the carcase is 37 mm.
2. When using 5 mm pre-drilled holes, use special Euro screws (typically 6.3 mm x 13 mm). These grip firmly into the hole pattern and centre the plate automatically.
3. If no hole line exists, mark the 37 mm line using a marking gauge. Pre-drill approximately 10 mm deep using a 3 mm wood drill bit. Use a depth stop to avoid drilling entirely through the carcase wall.
4. Fasten the plate securely using chipboard screws (e.g. 3.5 mm x 15 mm). Ensure the correct drive type is used (TX or PZ) to prevent damaging the screw heads.

Step 3: Clip on the Ejection Unit

Once the base plate is firmly secured, the actual push mechanism is mounted.

1. Slide the housing of the touch latch onto the adapter plate from the front until it audibly clicks into place.
2. Check for a secure fit. The component must have no lateral play, otherwise force will be lost when pressing against the front.

Step 4: Mount the Counterplate on the Front (for Magnetic Latches)

Many push-to-open units feature a magnetic tip. This ensures the door rests lightly against the latch when closed without swinging open unintentionally. A small metal counterplate must be fitted to the inside of the door.

1. Close the door carefully and mark the point where the tip of the latch meets the inner face of the door.
2. Pre-drill minimally at this spot (maximum 2 mm depth).
3. Screw the small metal plate flush onto the surface. Alternatively, many manufacturers provide self-adhesive plates, which require a completely grease-free surface (clean using isopropanol).

Step 5: Adjust the Trigger Gap Precisely

This step is the most critical for ensuring the smooth operation of handleless doors.

1. The tip of the latch can be adjusted in length by rotating it (threaded mechanism).
2. Adjust the tip so that a gap of at least 2 mm - 3 mm remains between the front edge of the carcase and the closed door.
3. Test the mechanism: push the door shut. It must rest against the latch. Now press lightly against the front. The door must travel inwards by the specified 2 mm - 3 mm until a quiet click is heard.
4. Release the pressure. The pin extends outward and pushes the door open.
5. If the gap is too narrow, the mechanism cannot be depressed far enough and the door will bind. If the gap is too wide, the front will appear misaligned.

Typical Applications and Fitting Selection

Choosing the correct release system depends heavily on the furniture design.

Hinged Doors and Cupboards

Standard touch latches are sufficient for regular doors made of chipboard or MDF. The crucial factor here is the hinge. A standard furniture hinge with a 110° opening angle requires a 35 mm cup drilling hole. For push-to-open functionality, fitters use concealed cup hinges / cabinet hinges 110 degrees without self-closing springs. For corner solutions or inset door situations (e.g. inset mounting), the trigger travel of the latch often requires slightly more generous adjustment.

Drawers and Pull-Outs

In drawers, the push-to-open mechanism is not mounted as a separate pin in the carcase, but is integrated directly into the runner. When planning handleless drawer boxes, dedicated push to open drawer runners are required. These runners feature an integrated spring system at the rear. Here too, a full extension runner with integrated push-to-open must not be paired with a soft-close damper unless using specialised, synchronised premium systems that mechanically separate both movements. For complete new builds, pre-assembled drawer systems provide drawer sides and runners perfectly matched from the factory.

Flap Fittings for Upper Wall Units

Upward-opening fronts present a unique challenge because the weight of the door acts against the release mechanism. In these cases, flap fittings are used. For heavy fronts, a standard touch latch is often insufficient to push the heavy panel open. In such situations, long-stroke latches (with an ejection travel of up to 40 mm) are fitted in combination with specialised hinges. Once the flap is released and open by a gap, you reach behind the front and lift it upward, where a gas strut for heavy flaps takes over the lifting work and holds the flap securely open. The force of the gas spring (specified in Newtons) must be precisely matched to the weight of the front.

Avoiding Common Installation Mistakes

Even experienced tradespeople encounter occasional issues when adjusting push systems. The three most common problems include:

1. Conflicting fittings: Attempting to retrofit a touch latch to a door equipped with standard sprung hinges. The spring in the hinge constantly pulls the door shut, meaning the latch lacks the force to push it open against this resistance. The hinges must be replaced with unsprung versions.
2. Incorrect depth positioning: If the adapter plate is not mounted precisely on the 37 mm line, the adjustment range of the tip may not be sufficient to establish the 2 mm - 3 mm trigger gap. The door will hit the carcase edge before the mechanism can trigger.
3. Weak magnetic hold on large doors: On very tall cabinet doors (such as wardrobes), the door panel may warp slightly due to room climate variations. A single latch in the centre may not keep the door aligned. Using two latches (top and bottom) or stronger magnetic catches is recommended.

FAQ: Frequently Asked Questions About Push-to-Open

Can push-to-open and soft-close be combined? With standard cup hinges and simple touch latches, this is physically impossible because the mechanisms work in opposite directions. However, specialised, mechanically complex drawer runners exist that combine both functions in a single fitting.

Why does the touch latch trigger, but the door fails to open? This occurs when the cabinet hinges feature an integrated spring or self-closing mechanism. The latch unlocks, but its spring force is insufficient to overcome the closing force of the hinges.

How wide must the gap be between the door and the carcase? For the mechanism to trigger, the door must be able to compress inwards by 2 mm - 3 mm. This gap is structurally necessary for handleless push-to-open furniture.

Are there differences in ejection travel distances? Yes. Short-stroke latches push the door open by approximately 15 mm - 20 mm, which is sufficient on standard doors to reach behind with your fingers. Long-stroke latches (up to 40 mm) are used for heavy doors or lift-up flaps to allow easier access.