Flap Stays as Replacements for IKEA Metod

A flap stay supports and guides upward-opening cabinet fronts, where the required spring force in Newtons must be matched precisely to the weight and height of the flap.

When a kitchen wall unit door no longer stays open or slams shut uncontrollably, the lifting mechanism is usually worn out. Particularly with standardised kitchen systems, fitters and joiners often face the task of replacing defective fittings. Reaching directly for the original manufacturer component is not strictly necessary. Components from furnica serve as an exact-fit alternative to familiar systems or as replacements for faulty fittings, provided the technical specifications align.

This guide explains what to look out for when selecting replacement hardware – compatible with IKEA Metod or similar carcase systems – how to calculate the correct spring force, and the technical procedure for replacement.

Key Compatibility Factors to Consider

For a new fitting to serve as a replacement for an existing system, the mechanical connection points and force ratings must be identical. Compatibility is determined not by the brand name, but by the hole pattern and lifting capacity.

Spring Force in Newtons (N)

The most crucial technical specification for a gas strut is the extension force, specified in Newtons. If this value is too low, the flap drops down. If it is too high, closing the cabinet requires significant effort, placing excessive strain on the hinges.

On many worn original parts, the N rating is printed directly on the cylinder (for example, 250 N or 320 N). If the print is no longer legible, the force must be calculated. The general rule of thumb for furniture fronts is: weight of the flap (in kg) × 10 = required force in N. A leverage allowance must also be factored in depending on the flap height. For a standard MDF front measuring 400 mm in height and 600 mm in width, the weight is approximately 3.5 kg to 4 kg. Here, a strut rated at 50 N or 60 N per side (total 100 N to 120 N) is often sufficient, whereas solid fronts require significantly stronger cylinders.

Hole Pattern and System 32

Industrially manufactured kitchen carcases are generally based on System 32. This means that the pre-drilled hole rows in the side panels have a centre-to-centre spacing of exactly 32 mm, with a hole diameter of 5 mm.

When installing a fitting as an alternative to existing systems (such as hardware compatible with Utrusta flap fittings), inspect the mounting plates. The fixing points of furnica replacement components are engineered so that they can be secured into the existing hole line using standard Euro screws.

Interaction with the Concealed Hinge

A hydraulic or mechanical lift mechanism never operates in isolation. The rotational movement of the flap is guided by a concealed cup hinge on the top panel of the carcase. Typically, hinges with a 35 mm cup diameter and a 110° opening angle are used here. When the door overlays the carcase sides, this is a full overlay application. The new lift stay must not exceed the maximum opening angle of the hinge, otherwise the cup drilling in the front may tear out.

Suitable furnica Components for Replacement

Depending on the front's weight and the desired movement type, various technical solutions serve as replacements for defective kitchen fittings.

• Standard Gas Struts: These cylinders are ideal for classic wall units. They assist the opening action and hold the front securely in its end position. A broad selection of models with diverse N ratings can be found in the flap stays category.
• Heavy-Duty Systems: For very wide cabinets or heavy materials (such as solid timber or glass fronts), a standard cylinder is insufficient. In such cases, heavy-duty gas struts are required. These models feature a reinforced cylinder and robust metal mounting brackets.
• Drop-Down Flap Stays: This variant is used for flaps that open downwards (e.g. on a drinks cabinet). They brake the descent of the front. Please note: A drop-down flap stay is kinematically the exact opposite of an upward-opening lift mechanism.

Wall cabinet mechanics are frequently part of a comprehensive kitchen layout. While an internal plate rack might be concealed behind an overhead flap above the sink, the base units typically feature kitchen cabinet pull-outs. Here too, if a 60 cm kitchen cabinet pull-out is defective, the replacement is determined by the nominal length (e.g. 500 mm) and load capacity, rather than the original brand.

Installation and Retrofitting in Practice

Replacing a gas strut is very similar to replacing the tailgate strut on a car: the geometry of the fixing points must be strictly adhered to so that the leverage acts at the correct angle.

Required Tools

• Cordless screwdriver with matching bit (typically PZ size 2 for woodscrews)
• Folding rule or tape measure
• Bradawl or centre punch
• Slotted screwdriver for releasing the spring retaining clips

Step-by-Step Installation

1. Removing the Old Fitting: Open the flap fully and support it (or have a second person hold it securely). Using a flat-blade slotted screwdriver, gently lever up the small metal retaining clip on the ball sockets of the old cylinder. The cylinder can now be pulled off the ball stud.
2. Checking the Mounts: Check the round ball studs on the carcase side and the front panel. If these are identical to the sockets of the new furnica cylinder (usually standard dimensions), the existing brackets can remain in the timber. This saves time and avoids new drill holes.
3. Replacing the Mounting Plates (if necessary): If the ball studs do not match, unscrew the old plates. Position the new plates using the exact same measurements. Use woodscrews (e.g. 4 mm x 16 mm). Ensure you do not drill through the material on an 18 mm thick door.
4. Clipping in the New Cylinder: With the flap in the open position, push the cylinder sockets onto the ball studs until the spring clip audibly snaps into place. Important: The thicker cylinder body should point upwards, with the thin piston rod pointing downwards. This ensures proper lubrication of the internal seals by the oil contained inside the cylinder.

Frequently Asked Questions (FAQ)

Can I replace only one side if the cabinet uses two lift stays? No. Gas struts should always be replaced in pairs. An old and a new cylinder possess different residual forces. This asymmetry causes the cabinet door to twist during closure. Over time, this damages the hinges and ruins the door alignment across the kitchen.

Is there a specific drilling jig for 110-degree hinges compatible with IKEA fronts? For installing concealed hinges into standard kitchen fronts, conventional drilling jigs for System 32 can be used. The distance from the door edge to the centre of the cup hole (the drilling distance) is typically 21.5 mm to 22.5 mm on standard fittings. A universal jig for a 35 mm cup hinge works seamlessly here.

What is the difference between a gas strut and a damper? A gas strut actively pushes outwards (extension force in Newtons) to lift and support a load. A furniture damper (soft-close mechanism), on the other hand, absorbs kinetic energy and decelerates a closing door. These two components perform entirely different technical functions and cannot be interchanged.