How to Repair a Drawer: Step-by-Step Guide

July 19, 2026

A successful drawer repair in most cases requires the exact replacement of defective runners, taking into account the installation width, nominal length in millimetres, and load capacity.

When a drawer sticks, rubs, or tilts, the cause is rarely the piece of furniture itself, but rather worn-out fittings or a distorted construction. For the joiner or experienced fitter, restoration is a clearly defined process. This guide leads through the technical diagnosis, the selection of the correct replacement hardware, and proper installation.

Difficulty level: Medium Time required: 30 to 45 minutes per drawer

Required Tools & Materials

For a precise repair or upgrading complete drawer systems, the following equipment is required:

Cordless screwdriver with suitable bits (usually PZ 2 or TX 15 to 20)
Folding rule or tape measure
Joiner's square
Spirit level (short)
Bradawl or wood drill bit (Ø 3 mm)
Chipboard screws (typically 3.5 x 16 mm or 4 x 16 mm, pan-head for runners)
Wood glue (for damaged carcase parts)
Replacement runners (after prior measurement)

Step 1: Fault Analysis and Removal

Before installing new components, the exact source of the fault must be determined. Pull the drawer out completely. With a classic ball-bearing slide, there is usually a small plastic release lever on the side of the runner that must be pressed up or down to separate the drawer box from the carcase profile.

Examine the removed box:

Is the drawer base sagging or has it slipped out of the groove?
Are the side panels intact, or has the wood torn out at the drill holes?
Does the drawer lock still engage precisely with the strike plate, or has the front warped?

Next, detach the defective drawer runners from the carcase and the drawer box. Remove all old screws completely.

Step 2: Determining the Correct Dimensions

Accurate measurement is crucial for proper operation. Three dimensions are essential:

Nominal length: Measure the depth of the drawer box (outer edge of the back panel to the inner edge of the front panel). The runner must not be longer than the box. Common dimensions include drawer runners 250 mm for very shallow bathroom furniture or drawer runners 300 mm for compact chests of drawers.
Installation width: This is the clearance between the outer side panel of the drawer and the inner carcase wall. For side-mounted ball-bearing slides, this dimension is industry-standard at exactly 12.7 mm per side.
Runner height: Relevant when vertical space inside the carcase is limited (e.g. 17 mm, 27 mm, 35 mm, or 45 mm).

Step 3: Choosing the New Runner Mechanism

Depending on the requirements of the furniture, the appropriate runner system must be selected. A replacement is often a good opportunity for a hardware upgrade.

A drawer runner roller slide is the simplest option. It is mounted at the bottom edge, made of powder-coated steel and a plastic roller. It usually functions as a partial extension, where around 25 % of the box remains inside the carcase.

For complete access to the contents, upgrading to drawer runners full extension is recommended. These telescopic runners allow 100-percent extension of the box. For tool cabinets or wide kitchen pull-outs, load capacity is crucial. Here, heavy-duty drawer runners come into play, capable of carrying weights from 45 kg to over 100 kg.

Pay attention to the desired motion mechanism:

Drawer runners with soft close absorb momentum and pull the drawer shut silently and smoothly over the last few centimetres.
Drawer runners push to open operate using a spring mechanism and pop open with light pressure on the front. These systems are designed for handleless fronts. Note: Soft-close and push-to-open mechanisms are mutually exclusive in standard versions.

Step 4: Repairing the Drawer Box (Base and Sides)

Often it is not just the runner that is defective; the drawer box itself may have lost stability. A sagging base causes the drawer to scrape against the front below it.

Turn the box upside down. If the hardboard or thin MDF base has slipped out of the groove, unscrew the back panel. Slide the base back precisely into the grooves of the side panels. Apply some wood glue into the groove before screwing the back panel back in place. For additional reinforcement, small plastic brackets or dedicated drawer bottom fixings can be screwed on from below.

Equip the repaired drawer directly with useful drawer accessories. A tailored drawer anti-slip mat prevents heavy stored items from shifting during opening and closing, protecting the back panel from renewed strain. In the kitchen, a kitchen drawer organiser ensures even weight distribution.

Step 5: Installing the Carcase Runner

The carcase runner acts like the track bed of a train – if mounted crookedly, the smooth running of the entire assembly is derailed.

Use the System 32 grid if your carcase features corresponding system drilling. The hole spacing is always 32 mm, and the distance to the front edge is typically 37 mm.

Mark the correct height with a pencil and joiner's square.
Position the carcase runner and align it horizontally using a short spirit level.
Mark the drill holes. For side-mounted telescopic runners, always use the vertical and horizontal slotted holes for initial mounting. This allows for subsequent fine adjustment.
Fasten the runner securely using pan-head screws (not countersunk, as these can distort the runner).

Step 6: Installing the Drawer Runner

Separate the inner member of the new telescopic slide (using the release lever).

Place the member flat against the bottom edge of the drawer side panel.
The front edge of the runner must align flush with the rear face of the drawer front (or be set back slightly according to manufacturer specifications, typically 2 mm).
Screw the profile in place through the slotted holes. Ensure that screw heads sit completely flat so they do not rub against the ball cage later.

Step 7: Insertion and Fine Adjustment

Insert the drawer with its fitted inner runners horizontally into the carcase profiles. Push the drawer backwards with light, even pressure until the ball bearings audibly engage.

Check the alignment and gaps of the front. On modern undermount runners or premium metal drawer box systems, there are small eccentric adjustment screws behind the cover caps. These allow height adjustments (usually +/- 2 mm) and tilt adjustments. On classic side ball-bearing runners, adjustment is made by loosening the screws in the slotted holes, manually realigning, and subsequently fixing them in the round screw holes.

Common Mistakes & Fitter Tips

Incorrect screw head: Using countersunk screws instead of pan-head screws in the runner holes is the most common installation error. The conical head forces the metal apart, obstructs the ball carriage, and permanently damages the ball cage.
Ignoring installation width: Forcing a 12.7 mm runner into an 11 mm gap makes the drawer extremely stiff. If the gap is too large (e.g. 14 mm), the ball bearings may fall out of the cage. Spacers can help rectify this.
Drilling at an angle: Driving chipboard screws in without pilot holes often causes them to follow the wood grain and wander off-centre. A 3 mm pilot drill bit guarantees straight placement.

FAQ

Why does my soft-close drawer no longer close completely? Usually, the activator catch for the soft-close mechanism at the rear of the carcase runner is no longer tensioned or is blocked by debris. Pull the catch forward manually using a screwdriver until it clicks, then firmly push the drawer closed to re-engage the system.

Can I replace an old roller runner with a full-extension ball-bearing slide? Yes, provided the installation width (gap between drawer and carcase) is exactly 12.7 mm per side. If the gap is narrower, the drawer sides must be planed or trimmed down.

What screw length is ideal for mounting runners? For standard carcase thicknesses of 16 mm or 18 mm, screws measuring 3.5 x 16 mm or 4 x 16 mm are ideal. They provide maximum hold without piercing through the other side of the chipboard.

What does System 32 mean in furniture construction? It is an international standard in furniture manufacturing. Holes in the carcase side panels are spaced exactly 32 mm apart with a diameter of 5 mm. Almost all modern fittings are designed around this grid.