Retrofitting Full-Extension Drawer Runners for Nobilia: Accurate System 32 Installation on Cabinet Side Walls

December 26, 2025

When retrofitting a Nobilia kitchen cabinet with a full-extension runner, the drawer becomes 100% extendable, with installation carried out precisely via the standardised 32 mm hole pattern on the cabinet side wall.

Upgrading from a simple partial-extension runner to a modern full-extension runner is one of the most effective measures to enhance ergonomics in an existing kitchen. Kitchen manufacturers such as Nobilia build their carcasses according to industrial standards, making the replacement of runner tracks predictable. The critical factor for smooth operation is absolute dimensional accuracy when positioning the new runners on the interior cabinet wall.

This guide is aimed at fitters and experienced DIY enthusiasts. It covers the technical prerequisites, correct use of existing hole patterns, and step-by-step installation of runner systems in standard kitchen cabinets.

Difficulty level: Medium Time required: approx. 30 - 45 minutes per drawer

Technical Principles: System 32 and Nobilia Carcasses

Almost all modern kitchen cabinets are based on System 32. System 32 functions as an invisible coordinate system in cabinet making: if the zero reference point is set at the front edge, every subsequent drilling position aligns with mathematical precision. The vertical distance from hole centre to hole centre is exactly 32 mm. The front line of holes is positioned at a standard setback of 37 mm from the front edge of the carcass (excluding the front panel). The hole diameter for mounting fixings is typically 5 mm.

Nobilia base units standardly feature an external cabinet depth of around 560 mm. For this depth, full-extension drawer runners with a nominal length of 500 mm are typically used. For extra-deep cabinets, correspondingly longer runners, such as 600 mm nominal length, are installed.

Ball-Bearing Slides vs Undermount Runners

Before starting the installation, you must select the appropriate runner system:

Undermount runner: The runner track sits concealed beneath the drawer base. This is the current standard in high-grade drawer systems. It requires specific rear-panel cut-outs on the drawer and dedicated locking clips on the front underside.
Ball-bearing slide: The runner is screwed directly to the side of the drawer box and the cabinet side wall. It is robust, but demands more side clearance (often 12.7 mm or 13 mm installation gap per side).

Required Tools and Materials

For professional removal and new installation, you will need the following components and tools:

Materials:

1 pair of drawer runners (full-extension) in the matching nominal length (e.g. 500 mm).
Euro screws (6.3 x 13 mm or 6.3 x 14 mm) for securing into the 5 mm drilled holes of the hole pattern.
Chipboard screws (4 x 15 mm or 3.5 x 15 mm) with PZ or TX drive for securing positions without pre-drilled holes.
If necessary, new front fixing brackets or locking clips (system-dependent).

Tools:

Cordless drill/driver with torque control.
Matching driver bits (PZ2 for Euro screws, TX20 for modern wood screws).
Folding rule or tape measure.
Vernier caliper for exact depth measurements.
Bradawl or centre punch.
Self-centring drill bit (if new fixing holes must be drilled into the drawer side).

Step-by-Step Guide: Installing Full-Extension Runners

The following guide describes replacing the carcass runners and fitting the drawer, using a concealed undermount runner as a primary example, as commonly found in kitchens.

Step 1: Removing the Old Components

Pull the existing drawer out completely. In most systems, the drawer box can be detached from the runner with a firm upward pull (at the front edge), or by engaging small release levers on the underside of the front locking clips. Next, undo the screws on the old carcass runners. Remove the runners carefully to avoid damaging the coating on the chipboard carcass wall.

Step 2: Dimensional Check and Positioning

Measure the clear internal cabinet depth. In a standard carcass, you will have clearance for a 50 cm kitchen cabinet runner. Check the hole pattern on the new runner. The foremost fixing position of the new runner must align precisely with the 37 mm dimension of the front hole line. Note: Pay attention to vertical positioning. If you install multiple 60 cm kitchen cabinet runners vertically above one another, the distances between the runners must accommodate the height of the respective drawer fronts plus the reveal gaps (usually 3 mm to 4 mm).

Step 3: Fitting the Carcass Runners

Position the new runner against the cabinet side wall.

Insert the first Euro screw through the corresponding hole in the runner track into the front hole line of the carcass. Tighten the screw hand-tight.
Align the runner horizontally. Use the rear hole line to secure the second Euro screw.
Most undermount drawer runners feature slotted holes. These are intended for fine adjustment. Once the runner sits perfectly level and square, secure it with additional chipboard screws through the round fixing holes. This prevents subsequent sagging under heavy load.
Repeat the process mirrored on the opposite cabinet wall.

Step 4: Preparing the Drawer (Installing Locking Clips)

To ensure the drawer locks correctly onto the new runner, the front locking clips must be mounted on the front underside of the drawer base. Push the clips flush into the front corners (between the drawer base and the side wall) and screw them firmly in place using flat-head screws (typically 3.5 x 15 mm). Ensure that screws are driven straight; driving them at an angle can cause the clip mechanism to jam.

Step 5: Insertion and Adjustment

Pull both carcass runners forward slightly. Place the drawer level onto the runners and push it back smoothly into the cabinet until you hear an audible click. This sound confirms that the rear hooks of the runner have engaged the rear-panel drillings and the front locking clips have engaged.

Now inspect the reveal gaps of the front. Modern runners feature 3D adjustment on the locking clip:

Height adjustment: Usually via a small wheel on the clip (adjustment range approx. + 2 mm / - 2 mm).
Side adjustment: Via a slider on the clip (adjustment range approx. +/- 1.5 mm).
Tilt adjustment: Located typically at the rear end of the runner or on the drawer side profile, used to correct tilting fronts on deep drawers.

Common Mistakes and Expert Tips

Confusing Soft-Close with Push-to-Open A frequent planning error is assuming that Soft-Close and Push-to-Open are identical. These are distinct mechanisms. Soft-Close is a damping system that brakes the drawer over the final centimetres and pulls it gently shut. Push-to-Open (or Tip-On) is a mechanical ejector for handleless fronts that opens the drawer upon pressure. Combining both features is only possible with specialised, complex hardware systems.

Using the Wrong Screw Heads Never use countersunk screws for securing runner tracks unless the runner explicitly features countersunk holes. A protruding screw head will otherwise foul against the moving roller carriage. Use flat-head or pan-head screws for flat fixing holes. Suitable fastening items can be found within the wood screws and furniture screws range.

Ignoring Load Capacity Kitchen drawers, especially those storing pots, pans, or food provisions, quickly reach substantial weights. A standard drawer runner is often rated for 30 kg. For wide drawers (e.g. 900 mm or 1000 mm cabinet width), heavy-duty runners with a load rating of 40 kg to 65 kg must be used to prevent track distortion under load.

Insufficient Side Clearance on Ball-Bearing Slides If you opt for side-mounted ball-bearing slides instead of undermount runners, the drawer box must be built narrower than the clear internal carcass width. With a typical slide thickness of 12.7 mm, the drawer must be made exactly 25.4 mm narrower overall. If the drawer is even 1 mm too wide, the ball bearings will bind, ruining the slide in a very short time.

FAQ – Frequently Asked Questions

Can I install any runner into a Nobilia cabinet? In principle yes, provided the nominal length of the runner matches the carcass depth. Nobilia uses standard System 32 hole spacing. However, if you plan to reuse the existing timber or metal drawer box, the new runner must match the bottom and rear profile of that specific drawer. Replacing an undermount runner with an equivalent system from a different hardware brand will usually require replacing the locking clips as well.

Which runner length do I need for standard Nobilia base units? With an external carcass depth of 560 mm, the clear internal depth is usually around 530 mm. For this setup, a runner nominal length of 500 mm is the industry standard.

Why does the retrofitted drawer not close flush with the carcass? This is usually caused by incorrect positioning of the carcass runner. If the foremost screw does not sit precisely at the 37 mm setback of the hole line, the front will either protrude or close prematurely. Obstructions behind the drawer or an incorrectly set tilt adjustment can also cause misalignment.

Do I need specialist tools for installation? A standard cordless drill/driver, tape measure, and screwdriver are sufficient for a straightforward replacement. A self-centring drill bit is extremely helpful to drive pilot holes dead-centre into the runner slots, preventing the runner from shifting while tightening the fixings.

Related Hardware and Component Categories

For the complete outfitting, repair, or upgrade of kitchen cabinets, discover matching fittings and hardware systems designed to work with these identical installation principles: