Retrofitting Drawer Runners for Mepla Kitchens

A full-extension runner extends by 100%, whereas a single-extension runner projects only around 75% out of the carcass due to its design.

Older kitchen cabinets are often equipped with robust fittings that endure for decades. However, when the mechanism wears out after countless opening cycles, the installer faces the task of sourcing a suitable replacement. Since original parts for older systems are frequently discontinued, repairs require components that can serve as replacements for Mepla. Retrofitting drawer runners requires precise measuring and an understanding of the existing carcass design.

What to Consider for Compatibility

For a new runner to be compatible with Mepla systems, three key geometric factors must match exactly: the installation width, the nominal length, and the hole pattern. The runner system acts as the chassis of the kitchen cabinet – if the track width is not correct, the entire system will jam.

Installation Width and Nominal Length

The installation width defines the space between the inside wall of the carcass and the outside of the drawer box. With traditional runners, this value is often exactly 12.7 mm. A deviation of just a few millimetres results in a sticking or falling drawer. The nominal length describes the depth of the runner in the closed position. Common dimensions for kitchen base units range from 250 mm - 800 mm. The new runner must be at most as long as the internal carcass depth minus a 3 mm to 5 mm tolerance for the back panel.

Hole Pattern and System 32

In industrial furniture manufacturing, holes drilled into the carcass are based on System 32. This means that the spacing between hole rows is a multiple of 32 mm, and the distance from the front edge of the cabinet to the first hole typically measures 37 mm. When sourcing parts suitable for Mepla, the new carcass runner should feature slotted holes that replicate this exact 32 mm grid.

Comparison of Runner Types

When selecting replacement parts, the type of runner must be taken into account:

• Roller runners: Made of epoxy-coated steel with a plastic roller. Usually designed as a single extension.
• Ball-bearing runners: Use steel balls within a telescopic profile. Often designed as a full extension, offering greater lateral stability.
• Undermount runners: Mounted invisibly beneath the drawer base. Often require special front locking clips.

Suitable furnica Parts as an Alternative to Mepla

Choosing the correct fitting depends on the weight of the drawer and the desired level of convenience. furnica offers various technical solutions that can be installed as an alternative to Mepla runners.

• The classic 1:1 replacement: Older kitchen drawers with a side groove (often 17 mm) or a simple bottom-mount configuration frequently use roller runners. Matching drawer runners roller runners can usually be mounted without drilling new holes in the carcass due to identical screw positions.
• The upgrade to full access: To eliminate the dead zone at the back of the drawer box, upgrading to drawer runners full extension is ideal. Here, you must ensure that the installation width of the telescopic runner matches the old dimension exactly.
• Retrofitting soft-close: To ensure silent closing of drawer fronts, drawer runners with soft close are ideal. The integrated soft-close mechanism absorbs the momentum over the final centimetres. A mechanical alternative is drawer runners with self-closing mechanism, which pull the box into its end position via a spring.
• For pan drawers and heavy provisions: For drawers holding crockery, pots, or heavy tinned goods, the standard load capacity of 25 kg is often insufficient. In these cases, heavy-duty drawer runners must be installed. These feature a load capacity ranging from 45 kg up to 100 kg and strictly require solid fixings into the carcass.
• Complete drawer systems: If you need to renew not just the runners but complete kitchen drawer systems, a solution with double-walled metal sides is recommended.

Installation and Retrofitting: Technical Implementation

Replacing drawer runners requires neat workmanship and the correct fixings.

Tools and Materials Required

• Cordless drill/driver with torque control
• Bit system: Pozidriv (PZ) or Torx (TX)
• Chipboard screws (countersunk, Ø 3.5 mm or 4 mm, length e.g. 16 mm)
• Folding rule and set square
• Bradawl or centring drill bit (Ø 2.5 mm)

Installation Steps for Ball-Bearing Runners

1. Removal: Remove the old drawer. Unscrew the old carcass runners. Fill any tear-out in the wood with wood filler and allow it to cure if the old drill holes cannot be reused.
2. Separating the runner: For telescopic runners, press the release lever (usually made of plastic) to separate the drawer profile from the carcass profile.
3. Fitting the carcass profile: Place the wider carcass profile against the internal cabinet wall. Position the front edge of the runner flush with the carcass front edge (or set back by the front panel thickness for inset fronts). Fix it through the slotted holes using 3.5 x 16 mm screws.
4. Fitting the drawer profile: Screw the narrow profile centrally onto the side panel of the drawer box. The front edge of the profile sits flush with the rear of the front fascia.
5. Reassembly: Hold the drawer horizontally and slide the profiles into one another. A subtle click indicates that the release lever has engaged.

Frequently Asked Questions (FAQ)

Can I simply replace a single-extension runner with a full-extension runner?

Yes, provided the installation width between the carcass and the drawer remains identical. If the old single-extension runner had a width of 12.7 mm, a telescopic ball-bearing runner with the same dimensions can be installed. The System 32 hole pattern usually allows the use of existing carcass drill holes.

Can soft-close and push-to-open be combined?

No, typically not. Soft-close decelerates the drawer and pulls it shut gently. Push-to-open, by contrast, pushes the drawer open using spring force when the front is pressed. These are opposing mechanisms. For handleless fronts, push to open drawer runners without additional soft-close damping must be used.

Which screws are best suited for mounting into the carcass?

For chipboard and MDF carcasses, chipboard screws with a diameter of 3.5 mm or 4 mm are suitable. The length should be 16 mm to avoid piercing through the typical 18 mm thick carcass wall. Screws with a Torx drive offer the best torque transmission without cam-out; alternatively, Pozidriv (PZ2) is the industry standard in furniture making.