Retrofitting Full-Extension Drawer Runners for Alno Kitchens

A full-extension runner can be pulled out 100% from the cabinet carcass, whilst a partial-extension runner stops at around 75% due to its design.

When older kitchen cabinets need a technical upgrade, replacing the drawer runners is often the top priority. Many existing kitchens were factory-fitted with basic roller runners or partial-extension slides. Upgrading to modern runner systems provides full access to the entire drawer contents and delivers significantly smoother running action. When searching for fittings suitable as replacements for Alno kitchens, it comes down purely to the technical parameters of the cabinets. Furnica provides runner systems compatible with Alno carcasses, provided the installation dimensions, nominal lengths, and hole patterns match precisely.

What to Consider Regarding Compatibility

A seamless replacement of furniture fittings requires precise measuring. The compatibility of replacement parts does not depend on the kitchen brand name, but on standardised construction dimensions in furniture manufacturing.

System 32 and the Hole Pattern

Most industrially manufactured kitchen carcasses are based on System 32. This means the drill holes in the side panels have a vertical spacing of exactly 32 mm between them. The distance from the front edge to the first row of drill holes is typically 37 mm. When retrofitting runners compatible with Alno, you can utilise these existing hole lines. Fixing is ideally carried out using specialised Euro screws that fit precisely into the 5 mm pre-drilled holes.

Installation Width and Side Clearance

Side clearance describes the gap between the outer drawer side panel and the inner carcass wall. For a classic side-mounted ball-bearing runner, this dimension is standardly 12.7 mm per side. If the existing drawer is designed for this clearance, the new runner integrates seamlessly. For an undermount runner, which runs concealed beneath the drawer base, different tolerances apply regarding the timber thickness of the drawer (often a maximum side panel thickness of 16 mm).

Nominal Length of the Runner

The nominal length defines the length of the closed runner. Common sizes in the kitchen sector range from 250 mm - 800 mm. For standard base units with a carcass depth of around 560 mm, runners with a nominal length of 500 mm are most frequently used. The new runner must never be longer than the internal clear depth of the carcass.

Suitable Runners for Different Cabinet Widths

Requirements for load capacity and hardware stability vary depending on the cabinet width and intended use. The range offers various kitchen cabinet pull-outs for upgrading traditional base units.

• Wide frontals and heavy loads: When planning a kitchen cabinet pull-out 60 cm or a kitchen cabinet pull-out 50 cm, these often store heavy pots, pans, or stacks of crockery. Here, heavy-duty runners with a load capacity of 45 kg to 50 kg are essential to prevent the drawer from sagging when fully extended.
• Medium to narrow modules: For cutlery drawers or provisions, a kitchen cabinet pull-out 40 cm or a kitchen cabinet pull-out 30 cm is suitable. In most cases, a standard load capacity of 30 kg is completely sufficient.

Replacing a runner is like changing a tyre on a vehicle – with the correct tools and precisely matched dimensions, it is a straightforward routine task.

Installation and Retrofitting: Technical Steps

Installing new runners requires precise workmanship so that the frontal gap alignments remain flush and uniform.

Required Tools

• Cordless screwdriver with matching bits (PZ or TX drive)
• Rule or vernier calliper
• Spirit level or set square
• Chipboard screws (Ø 3.5 mm or 4 mm, preferably countersunk) or Euro screws
• Bradawl or wood drill bit (Ø 3 mm or 5 mm)

Step-by-Step Installation

1. Dismantling: Remove the old drawer and unscrew the existing carcass runners. Clean any dust from the side panels.
2. Measuring and marking: Determine the exact height for the new runner. Use the existing System 32 wherever possible. If new holes need to be drilled, mark a perfectly horizontal line.
3. Fitting the carcass runner: Screw the carcass section of the new runner into place. Ensure the runner sits flush with the front carcass edge (or maintains the manufacturer-specified setback, e.g. 2 mm).
4. Fitting to the drawer: Attach the corresponding runner component to the drawer. For undermount runners, specialised locking clips are often screwed to the front underside of the drawer.
5. Inserting and adjusting: Place the drawer onto the runners and push it in with gentle pressure until the mechanism audibly clicks into place. Check the alignment gaps and adjust the frontal panel if necessary using the integrated height and lateral adjustments on the locking clip.

Complementary Upgrades Inside the Kitchen Carcass

With the drawers already dismantled and runners being renewed, it is the ideal time for further technical and functional enhancements within the carcass.

A pull-out kitchen bin is frequently installed in the sink base unit. These systems also rely on robust runner mechanisms. For wider sink units, a pull-out kitchen bin 60cm is ideal for making optimal use of the newly gained extension travel for a waste separation kitchen bin.

Internal drawer organisation can also be optimised. A perfectly fitting kitchen drawer organiser ensures that cutlery and cooking utensils do not slide around during dynamic opening and closing. Anyone updating the look of their frontals as part of the modernisation can complete the project by fitting new kitchen furniture handles.

Mechanism Types: Soft-Close and Push-to-Open

When selecting new fittings, installers encounter different mechanical features. These must not be confused during planning, as they follow opposite operating principles.

• Soft-Close: Refers to integrated damping. A spring mechanism catches the momentum of the drawer over the final few centimetres and pulls it gently and silently into the carcass. This system requires a conventional furniture handle for opening.
• Push-to-Open: Designed for handleless frontals. Light pressure applied to the front activates a spring that ejects the drawer slightly out of the carcass. In purely mechanical (non-electric) systems, Push-to-Open and Soft-Close are generally mutually exclusive, as the damping mechanism would counteract the spring ejection.

FAQ – Common Questions About Compatibility

Can I use any runner as an alternative to original Alno parts? Yes, provided the technical dimensions match. The crucial factors are the nominal length of the runner, the available side clearance between the drawer and carcass, and alignment with the carcass hole pattern. The brand name has no bearing on mechanical function.

Why is my drawer stiff to close after installation? This is usually caused by incorrect side clearance or runners that are not installed perfectly parallel. If the distance between the carcass runners is narrower or wider at the back than at the front, the ball-bearing runner will bind. Measure the internal clear width of the carcass at several points.

Can I replace a roller runner directly with an undermount runner? A direct swap often requires modifications to the wooden drawer box. Undermount runners fit underneath the base, which means the drawer bottom must be recessed relative to the side panels by a specific dimension (often 12 mm to 15 mm). Strict specifications also apply regarding the maximum thickness of the drawer side walls.

What does the "37 mm" dimension mean in installation guides? This dimension is a standard value in furniture construction. It describes the distance from the front edge of the carcass side panel to the centre of the first vertical row of holes. Nearly all modern drawer runners are designed so that their frontmost fixing holes align precisely with this 37 mm setback.