Retrofitting Soft-Close Drawer Runners for Mepla Kitchens
A soft-close runner gently brakes the drawer across the final few centimetres and pulls it shut automatically; when retrofitting older kitchen systems, the installation length, side clearance, and grid dimensions determine compatibility.
Older kitchen cabinets are frequently equipped with simple roller runners that slam loudly against the carcass when closed. Anyone wanting to modernise an existing kitchen often looks for suitable hardware that can serve as a replacement for Mepla or other legacy systems. Replacing the runners is a purely mechanical adjustment. Provided the carcass depth and drawer width are measured correctly, modern soft-close drawer runners can be integrated into existing furniture without difficulty.
This guide is aimed at installers and competent DIY enthusiasts who want to upgrade drawers to cushioned systems. It focuses on technical prerequisites, correct measurement, and selecting the right fittings.
What to Consider for Compatibility
For new soft-close drawer runners to fit into an existing carcass, three fundamental parameters must be determined precisely. A direct like-for-like replacement without measuring is rarely possible, as hole patterns have changed slightly over the decades. Nevertheless, retrofitting is very straightforward thanks to standardised dimensions in furniture construction.
1. System 32 and Hole Spacings
Most kitchen manufacturers construct their carcasses according to System 32. This means the centre-to-centre distance between vertical drill holes is exactly 32 mm. The standard distance from the front edge of the carcass to the centre of the first drill hole is 37 mm. When installing new runners as an alternative to Mepla, you can generally use the existing row of holes in the cabinet to align the carcass profile horizontally.
2. Installation Length and Carcass Depth
The nominal length of the runner must match the depth of the drawer. Common lengths for kitchen cabinets range from 450 mm to 500 mm. The runner must not be longer than the internal carcass depth (inside cabinet dimension minus the back panel). As a rule: the nominal length of the runner corresponds to the depth of the drawer side.
3. Side Clearance (Installation Width)
Side clearance is the gap between the outer drawer wall and the inner carcass wall. For standard side-mounted telescopic runners (ball bearing slides), an installation space of 12.7 mm per side is typically required. If the drawer is wider and the gap is narrower, the system will jam.
Suitable Runner Systems for Retrofitting
When selecting new fittings, a distinction must be made between the mounting type and the extension type. A single extension runner can only be pulled out of the cabinet by roughly 75%, leaving the rear section of the drawer inside the carcass. A full extension runner, on the other hand, exposes the entire interior (100% extension). For kitchen drawers, the latter is the technical standard.
Ball Bearing Runners
The side-mounted ball bearing runner is robust and supports weights from 30 kg to 45 kg depending on the model. It is screwed directly to the side of the wooden drawer. When converting classic timber drawers, this provides a highly versatile solution that can be made compatible with older Mepla wooden drawers. Suitable options can be found under drawer runners with soft close. If full access to stored items is the priority, using full extension drawer runners is recommended.
Under-Mount Runners
With an under-mount runner, the mechanism sits concealed beneath the drawer base. However, this requires specific routing on the drawer or dedicated locking devices at the front. If the older kitchen already features wooden drawers where the runners were mounted underneath, under-mount drawer runners are often the best replacement. They provide outstanding running characteristics and integrated damping.
Runners by Cabinet Width
The external dimension of the kitchen unit is often decisive for planning. The load capacity of the runners must be matched to the width of the drawer, as wider fronts create greater leverage forces when loaded. Pre-configured kitchen unit pull-outs are available for standardised cabinets. For the widely used 60 cm standard carcass, systems for a 60 cm kitchen unit pull-out are particularly suitable.
Cabinet Doors: Including Hinges in the Soft-Close Upgrade
When retrofitting drawers with a soft-close system, modernising the doors in the same step is a practical move. Old hinges often allow cabinet fronts to slam shut loudly. A modern concealed hinge features an integrated hydraulic damper within the hinge arm.
When replacing hinges, ensure that the cup drilling diameter in the door matches—the standard is 35 mm. Furthermore, the hinge crank type (full overlay, half overlay, or inset) must match the existing installation. Corresponding fittings are available under soft-close concealed cabinet hinges. For standard doors designed to open at a right angle, a 110-degree concealed cabinet hinge is the usual choice.
Installation and Retrofitting: Step-by-Step
Fitting works like clockwork—every drill hole must align precisely so the mechanism engages properly and activates the soft-close action smoothly.
Tools Required
- Cordless drill/driver
- Screwdriver with PZ (Pozidriv) or TX (Torx) drive
- Chipboard screws (e.g. 3.5 x 16 mm or 4 x 16 mm, countersunk)
- Euro screws (for 5 mm system holes in the carcass)
- Tape measure and pencil
- Bradawl or small wood drill bit (2 mm)
Step 1: Removal and Preparation
Remove the old runners from the carcass and from the drawer. Clean the surfaces. Check whether the old drill holes in the carcass can be reused. Often, the new runners can be aligned with Mepla hole patterns, provided both use the 32 mm grid.
Step 2: Fitting the Carcass Profiles
Separate the drawer profile from the carcass profile (on ball bearing runners, this is usually done via a small plastic release lever on the rail). Position the carcass profile inside the cabinet. The front edge of the runner is typically mounted flush with the front inner edge of the carcass, or with a 2 mm setback. Use Euro screws for existing 5 mm drill holes or chipboard screws for new positions. Ensure precise horizontal alignment.
Step 3: Fitting the Drawer Profiles
Screw the mating component to the side of the drawer. The runner generally sits flush with the front edge of the drawer box (behind the front panel). Insert screws into the centre of the slotted holes to allow for subsequent vertical fine adjustments.
Step 4: Insertion and Testing
Guide the drawer with the fitted profiles into the carcass runners. Push the drawer backwards with gentle pressure until it stops and the ball cages audibly click into place. Pull the drawer open and close it with a firm push. The soft-close mechanism should catch the movement over the final 30 mm to 50 mm and draw the front silently against the carcass.
Frequently Asked Questions (FAQ)
Can I combine a soft-close drawer with push-to-open? No, in standard configurations these two systems are mechanically mutually exclusive. Soft-close actively pulls the drawer shut via a spring and cushions the momentum. Push-to-open (tip-on), by contrast, requires resistance against which you push to release the drawer catch. The mechanisms work against one another.
How do I correctly measure the required runner length? Always measure the length of the runner in its closed state. If the runner is already removed, measure from the frontmost to the rearmost edge of the metal profile. Alternatively, measure the external length of the drawer box (excluding the attached front panel).
What should I do if the side clearance is insufficient for new ball bearing runners? If the gap between the drawer and the carcass is narrower than the required 12.7 mm per side, the new runner will bind. In this case, you must either reduce the width of the drawer (possible with timber drawers by planing or sawing) or replace the drawer with a completely new box system.
Are Furnica fittings suitable as replacements for Mepla? Yes, provided the mechanical installation dimensions (nominal length, side clearance, load capacity) match. Because the furniture hardware industry largely adheres to the 32 mm system standard, modern runners make an excellent compatible alternative to Mepla products in older kitchens.