Fitting a Drawer — Step-by-Step Guide

August 5, 2026

Fitting a drawer is based on the precise alignment of two runner components: the cabinet profile on the inside of the carcass and the drawer profile on the drawer box, where the tolerance for smooth gliding is usually under 1 mm.

The professional installation of drawer runners is one of the most precise tasks in furniture making. If gap sizes are uneven or the drawer jams when closing, the cause is almost always incorrect fitting of the hardware. This guide is aimed at installers, joiners, and skilled DIY enthusiasts who want to fit a drawer from scratch or replace old runners.

With good preparation, the actual installation time per drawer is approximately 20 to 30 minutes. Crucial to success are the exact marking of drill holes, maintaining the correct installation clearance, and choosing the right runner type.

Runner Types and Their Technical Specifications

Before picking up any tools, the construction of the drawer system must be clear. Installation differs fundamentally depending on the selected fitting.

Ball bearing runner: These telescopic runners are screwed to the side of the drawer. They consist of interlocking metal profiles that run on steel ball bearings. A full extension drawer runner allows the drawer to be pulled 100 % out of the carcass. A single extension stops at around 75 % of the nominal length. The standard installation clearance (the distance between the inside of the carcass and the outside of the drawer) is exactly 12,7 mm per side.
Roller runner: A simple and proven technology. Roller drawer runners consist of epoxy-coated steel and nylon rollers. They are screwed to the bottom side of the drawer. The installation clearance is usually 12,5 mm per side.
Undermount runner: The fitting is mounted invisibly beneath the drawer base. This requires specific machining on the drawer box (notch and bore). The drawer is often simply pushed onto the runner and clicks into place via a locking device.

Additionally, the opening and closing mechanism must be considered. Mechanisms such as soft-close (an integrated hydraulic damper gently pulls the drawer shut over the last few centimetres) and push-to-open (a spring mechanism pushes the handleless front open upon pressure) are completely opposite systems and require specific runners.

Required Tools and Fitting Materials

To ensure clean installation without tilting the runners, prepare the following tools:

Cordless drill/driver with torque adjustment
Matching screwdriver bits (usually PZ or TX for modern wood screws)
Folding rule and a precise try square
Spirit level or cross-line laser
Bradawl or a self-centring drill bit (2,5 mm or 3 mm)
Pencil with hard lead (H or HB)

Chipboard screws are used as fixings. For side-mounted ball bearing runners, pan-head screws (e.g. 3,5 mm or 4 mm diameter, 16 mm length) are typically used. Countersunk screws should be avoided here, as the conical head often protrudes beyond the runner profile and obstructs the ball carriage of the telescopic slide.

Step-by-Step Guide: Fitting Drawer Runners

The following guide covers the installation of a classic side-mounted ball bearing runner, as this represents the standard in modern furniture making and interior joinery.

1. Calculate and mark installation dimensions

The cabinet runner acts like the track bed of a train – any slight deviation in gradient directly impacts the running performance and the gap reveal of the drawer.

First, determine the height at which the runner should sit inside the cabinet carcass. In pre-drilled cabinets, the System 32 is often used. Here, the holes have a pitch of 32 mm to one another, and the first vertical row of holes is located exactly 37 mm from the front cabinet edge. Using the try square and pencil, draw an exact horizontal guideline on the inside of the carcass. Mark the distance from the front edge (usually 37 mm, provided the drawer front sits on top of the carcass as an overlay and is not inset).

2. Separate and position the cabinet runner

With telescopic runners, you must separate the inner profile (the drawer slide) from the outer profile (the cabinet runner) before fitting. Extend the runner fully. Inside, you will see a small plastic release lever. Press this lever up or down (depending on the side) to withdraw the inner profile completely.

Now place the wider outer profile along the drawn guideline inside the carcass. The frontmost mounting hole of the runner must sit exactly on the 37 mm mark.

3. Screw the cabinet runner in place

Punch the drill holes lightly with a bradawl so the screw bites immediately without slipping on the smooth melamine surface. Secure the runner in the front mounting hole. Next, align the runner horizontally using the spirit level and insert the rear screw. For long runners (from 450 mm), also use a central mounting hole to prevent sagging under load. Repeat the process mirrored on the opposite side of the carcass.

4. Fit the drawer runner to the drawer box

Take the narrow inner profile that you separated in step 2. Draw a horizontal centre line along the outside of the drawer box. Place the runner flush with the front edge of the drawer box. Ensure that the plastic release lever faces towards the rear of the drawer. Screw the runner to the drawer side, ideally using pan-head screws again.

5. Insert and adjust the drawer

Push the ball cage of the cabinet runners all the way to the front. Insert the drawer with the fitted inner profiles horizontally into the cabinet runners. Push the drawer backwards with even, gentle pressure. You will feel slight resistance as the profiles engage with the ball cages. A distinct click signals that the release levers have locked into position.

Check the glide. The drawer must move without scraping noises. Check the gap reveal around the front. Many modern drawer systems and undermount runners feature small adjustment thumbwheels on the underside of the locking catch, allowing the front to be adjusted by 1 mm to 2 mm in height, side, and tilt.

Interior Fittings and Functional Upgrades

Once the mechanical hardware is fitted, daily use comes into focus. The service life of the fittings and drawer bases can be extended through deliberate internal fittings.

To prevent pots, tools, or supplies from sliding around and to protect the base from scratches, using an anti-slip drawer mat is recommended. These mats also dampen noise when placing items inside. For organised storage, especially in wide drawers, a kitchen drawer organiser provides structure.

If the drawer is located in an office pedestal or stores sensitive documents, a drawer lock can be retrofitted into the front or carcass. The locking bolt engages either into the carcass bottom or into a fitted striking plate.

Common Installation Mistakes

Even small inaccuracies lead to noticeable performance issues in furniture construction. Avoid the following mistakes:

Confusing soft-close with push-to-open mechanics: Soft-close drawer runners pull the drawer shut softly. Installing soft-close runners in combination with handleless fronts does not work. For handleless fronts, you strictly require push-to-open drawer runners.
Selecting the wrong load capacity: A standard runner usually carries 25 kg to 30 kg. If a large drawer is loaded with tools or crockery, the profiles will bend and the bearings will drop out of the cage. Plan from the outset with heavy-duty drawer runners that can carry loads of 45 kg, 80 kg, or even over 100 kg.
Carcass out of square: If the cabinet carcass is not perfectly square and level, even the most precise runner installation will not help. Always level the carcass using the cabinet feet before inserting drawers.

FAQ: Frequently Asked Questions About Drawer Installation

How much clearance do I need for side-mounted drawer runners? For almost all side-mounted ball bearing runners, you must allow exactly 12,7 mm (often rounded to 13 mm) of space between the outer drawer wall and the inner carcass wall per side. For an internal carcass width of 500 mm, the drawer box must have an external width of at most 474,6 mm.

Can I simply replace a roller runner with a ball bearing runner? This is technically possible, provided the installation clearance matches. Since roller runners typically require 12,5 mm and ball bearing runners 12,7 mm, this usually fits within standard tolerances. However, the drilling patterns (hole spacings) of the two systems differ; you will need to mark and drill new mounting points for the runners.

Are there runners for very short drawers? Yes, lengths are standardised. For narrow bathroom units or small desk pedestals, 250 mm drawer runners or 300 mm drawer runners are suitable. Measure the internal clear carcass depth; the runner should always be around 10 mm to 20 mm shorter than the available depth.

How do I remove a stuck drawer? Pull the drawer out as far as possible. Look along the side runners for the small plastic release levers. Press the lever upwards on one side and downwards on the other side simultaneously. Then pull the drawer straight forward and off the tracks.

Related Categories for Your Project

If you would like to customise the appearance of your furniture alongside the mechanics or need further hardware for your project, you will find matching components in our specialist categories: