Retrofitting Lid Stays for IKEA Utrusta
A lid stay controls the opening and closing movement of a furniture front; when retrofitting for the IKEA Utrusta system, the force in Newtons (N) as well as the exact hole pattern in System 32 must be observed.
Kitchen wall units and living room furniture often use flap mechanisms to facilitate access to storage space. When the factory-fitted mechanism wears out, the front becomes heavier after a modification, or a standard hinge needs an upgrade, replacing the fittings becomes necessary. When searching for components to serve as replacements for IKEA Utrusta, technical compatibility is paramount. The mechanism must match the weight of the front and the existing hole patterns in the carcase precisely.
This guide is aimed at fitters and experienced DIYers looking to replace a lid stay professionally or integrate one into existing carcase systems.
What to Look for Regarding Compatibility
For a fitting to be suitable for IKEA Utrusta or similar carcase systems, the geometric and physical parameters of the furniture construction must be taken into account.
System 32 and the Hole Pattern
Industrially manufactured furniture carcases are based on System 32. This means that the vertical rows of holes on the inner sides of the cabinet have an exact spacing of 32 mm from one another. The distance from the front edge of the carcase to the centre of the first hole is standard at 37 mm. The hole diameter for shelf supports and fixing screws typically measures 5 mm.
When you install a new stay, the mounting plates ideally use precisely these hole rows. If this is not the case, new fixing points must be marked with a bradawl and secured using Euro screws (Ø 5 mm) or classic wood screws (Ø 3.5 mm or 4 mm).
Concealed Hinges and Opening Angles
A flap mechanism always works in conjunction with the hinges at the top edge of the cabinet. For standard carcases, concealed cup hinges are used for this purpose. The standard dimension for the cup drilling in the front is 35 mm. In fitting practice, a drilling jig specifically for the IKEA Utrusta 110-degree hinge is frequently sought after. Because these hinges follow industry standards, any standard commercial drilling jig for 35 mm cup hinges can be used, provided it matches the 37 mm distance from the edge. The opening angle of 110° is sufficient for most standard flaps. For lift-up flaps that open very wide, hinges with 155° are also used.
Calculating the Force: Newtons and Flap Weight
The choice of mechanism depends significantly on the weight of the front, including the fitted handle. The force of gas struts is specified in Newtons (N).
A precisely dimensioned gas strut acts on the cabinet like a well-tuned suspension spring on a car: it takes the weight of the flap and guides the movement in a controlled manner right to the end stop.
Common ratings are 50 N, 60 N, 80 N, 100 N, and 120 N. As a technical rule of thumb for calculation: 10 N corresponds to a lifting force of approximately 1 kg. For example, if an MDF front weighs 4.5 kg and the stainless steel handle weighs 0.5 kg, the total weight is 5.0 kg. In this case, a stay rated at 50 N (or two 50 N stays on wide fronts to prevent warping) is the correct choice.
For carcase units with solid fronts, mirrors, or thick chipboard, standard versions are often insufficient. For these, gas struts for heavy flaps are strictly required. Under-dimensioning results in the flap failing to stay open and dropping down; over-dimensioning (e.g. 120 N for a lightweight 3 kg front) causes the cabinet to require extreme effort to close and can tear the hinges out.
Suitable Components for Replacement
Depending on the function and installation location in the room, different mechanical solutions are suitable that are compatible with IKEA carcases.
Gas Struts (Lift-Up Flaps)
These are primarily used in kitchen wall cabinets. The cylinder contains compressed gas that pushes the piston outwards when opening the flap. They are maintenance-free and provide smooth movement. Especially around sinks, where a plate rack for wall unit is often concealed behind the flap, the gas pressure mechanism ensures quick and unobstructed access.
Friction Lid Stays (Mechanical Friction)
A friction lid stay dispenses with gas pressure. It consists of solid metal joints whose resistance is infinitely adjusted via a central Allen screw. This variant is ideally suited as a heavy-duty solution. It holds the flap in any desired position (multi-position stop) rather than pushing it automatically all the way to the top.
Flap Stays for Downward-Opening Fronts
Not every flap opens upwards. In living rooms, furniture whose fronts open downwards to conceal media equipment is common. When modifying a TV lowboard or a classic TV sideboard, you require specialised flap stays that cushion the drop of the front. These fittings limit the opening angle to exactly 90° and relieve load on the bottom hinges to prevent them from breaking out.
Installation and Retrofitting: Step-by-Step Guide
Fitting requires precision. A deviation of just a few millimetres drastically alters the leverage of the mechanism.
Required tools:
- Folding rule or tape measure
- Cordless screwdriver with PZ2 bit
- Wood drill bit (Ø 2 mm for pilot holes) or bradawl
- Screwdriver for fine adjustment
Step 1: Removal of old fittings Release the front from the cup hinges (usually possible without tools via clip-on mounting) and remove the old stays from the carcase.
Step 2: Positioning on the carcase Measure the fixing points on the inside of the carcase according to the instructions for the new fitting. If the component is compatible with System 32, you can use the existing 5 mm holes. Otherwise, mark the new points. Refer to the data sheet for the exact installation dimensions (e.g. 250 mm from the internal top edge).
Step 3: Mounting the fixing brackets Screw the carcase bracket (usually a round or oval mounting plate) tightly in place using chipboard screws (e.g. 4 x 16 mm). Ensure the plate is positioned at an exact 90-degree angle to the front edge.
Step 4: Positioning on the front Refit the hinges to the flap and hang it back onto the carcase. Open the front to the desired final angle (e.g. 90° or 110°). Now mark the position for the front fixing bracket directly on the inside of the front.
Step 5: Clipping in and adjusting Screw the front bracket into place. Most gas struts are now simply pressed onto the ball studs of both mounting plates until they audibly click into position. Check the closing action. If the flap shuts too harshly, additional dampers (soft-close buffers) can be drilled into the carcase edge.
Frequently Asked Questions (FAQ)
Can I retrofit a gas strut for heavy flaps on IKEA Utrusta? Yes. As long as the internal width and internal height of the carcase offer sufficient space for the cylinder length (typically 250 mm - 270 mm in the extended state), retrofitting is possible without issues. The hole pattern may need to be marked anew with a bradawl if the System 32 hole row is not located at the exact required height.
How do I find the correct force in Newtons (N) for my front? Weigh the front (door panel plus handle). Multiply the weight in kilograms by 10. A front weighing 6 kg therefore requires a total force of 60 N. For wide fronts (from approx. 600 mm), two 30 N struts should be fitted on the left and right to prevent the wood from warping.
Is there a specific drilling jig for the IKEA Utrusta 110-degree hinge? The Utrusta system uses standard cup hinges with a cup diameter of 35 mm. Any commercial jig for 35 mm cup hinges that incorporates the 37 mm edge distance (System 32) is suitable for marking the drill holes.
What is the difference between a friction lid stay and a gas strut? A gas strut actively pushes the flap upwards and holds it at the maximum opening angle. A mechanical friction lid stay operates using friction resistance; it does not push the flap open actively, but reliably holds it in the position where the user releases it.