Drawer Systems as an Alternative to Hettich — Compatible & Fitting

A compatible drawer system as an alternative to established manufacturers requires an exact match of carcase width, installation depth in millimetres, and the drilling pattern system used.

When runners in the kitchen start catching, soft-close dampening fails, or the plastic components of drawer sides break after years of strain, a replacement is due. For joiners and fitters, the question arises of finding the right replacement part. Installing complete drawer systems or individual runners as an alternative to Hettich is technically straightforward, provided the fundamental parameters of the furniture carcase are accurately measured.

This guide explains the technical requirements for replacing an existing system with a precise fit, which dimensions matter, and how the different movement mechanisms function.

What to Look Out for with Compatibility: Dimensions and Hole Patterns

Manufacturers of furniture fittings in industrial furniture production work almost exclusively to standardised grids. The most important criterion for the compatibility of runners is the System 32. The hole pattern in the carcase is like the foundation of a building – if the grid measurement of exactly 32 mm spacing between the drilled holes does not match, the new runner cannot be secured without extra drilling work. The distance from the front edge of the carcase to the first hole is usually 37 mm.

Alongside the hole pattern, three dimensions are decisive for a successful replacement:

1. Nominal Length (NL): This is the length of the runner when closed. It defines the depth of the drawer. Common dimensions for base kitchen cabinets are around 500 mm. For narrower bathroom furniture or office pedestals, drawer runners 350 mm or drawer runners 400 mm are often used. The nominal length of the replacement runner must strictly correspond to the available carcase depth.
2. Installation Width: The distance between the internal wall of the carcase and the outer edge of the drawer. With a classic ball-bearing runner, this clearance is often exactly 12.7 mm (half an inch).
3. Load Capacity: A drawer system in the kitchen carrying pots or plates requires a significantly higher dynamic load capacity than a shallow cutlery drawer. The load capacity is specified in kilograms and typically ranges from 25 kg up to 50 kg for a heavy-duty drawer runners system.

Additionally, the extension type must be defined. A full extension runner pulls out 100% from the carcase, allowing full access right into the back corners. A single extension only extends the drawer box by around 75%. Upgrading the system during a repair is best done by switching directly to full extension drawer runners.

Suitable Runner Systems as an Alternative to Hettich

When searching for a replacement part compatible with Hettich, the construction of the original drawer determines the choice of the new system. A fundamental distinction is made between wooden drawer boxes and double-walled metal drawer side systems.

Metal Drawer Sides for the Kitchen

In modern kitchens, double-walled drawer side systems are the standard. Here, the metal side simultaneously forms the side wall of the drawer. The base and back panel made from chipboard (mostly 16 mm thick) are cut to size and screwed in place. When replacing a kitchen cabinet pull-out 60 cm or a kitchen cabinet pull-out 50 cm, you generally replace the entire set consisting of sides, carcase runners, and front fixing brackets. The front brackets are screwed onto the existing furniture front and clipped into the new metal drawer sides.

Undermount Runners for Wooden Drawers

If the old drawer is made entirely of wood (sides, front, back panel), an undermount runner is used. These runners are mounted concealed beneath the drawer bottom. Undermount drawer runners are an outstanding alternative if the internal wooden aesthetic of the furniture unit is to be preserved. The runners engage via special front locking devices on the underside of the drawer base.

Ball-Bearing Runners and Roller Runners

For workshop units, simple chests of drawers, or office pedestals, side-mounted runners are common. A classic roller drawer runner is robust and easy to install, but typically only offers single extension. Ball-bearing telescopic runners are more precise and engineered for higher loads. For especially short pull-outs, such as in narrow alcove cupboards, drawer runners 250 mm or drawer runners 300 mm are ideal.

Movement Mechanisms: Dampening and Handleless Opening

When retrofitting or replacing a drawer system, the choice of opening and closing mechanism is crucial for everyday ease of use. Two concepts that serve entirely opposite technical functions are often confused here.

Soft-Close (dampening) ensures gentle and silent closing of the drawer. An integrated hydraulic damper cushions the momentum of the drawer over the final few centimetres, whilst a spring mechanism pulls it completely shut into the carcase. Soft-close drawer runners or self-closing drawer runners are standard for modern kitchens and living room furniture.

Push-to-Open (tip-on) is the mechanism for handleless furniture fronts. Light pressure on the front triggers a mechanical spring that pushes the drawer a few centimetres out of the carcase, allowing it to be gripped by hand. Due to their design, push to open drawer runners cannot typically be combined with classic soft-close dampening, as momentum is required to activate the spring mechanism.

Installation and Retrofitting: Replacement inside the Carcase

Replacing a drawer system requires accurate craftsmanship. To dismantle the old system and fit the new components, you will need the following tools:

• Cordless screwdriver with suitable bits (usually PZ2 for chipboard screws)
• Tape measure or folding rule
• Set square
• Pencil
• An awl for pilot marking new screw holes, if required

Step-by-Step Installation

1. Dismantling: Remove the old drawer. For undermount runners or metal box systems, this is usually done by releasing the catches on the underside or by pulling firmly and straight upwards and forwards.
2. Removing Runners: Unscrew the old carcase runners. Check whether the hole pattern (37 mm from the front edge, 32 mm grid) can be reused for the new runners.
3. Aligning New Runners: Position the new carcase runners. Use Euro screws (Ø 5 mm) if you are using the existing System 32 hole pattern. Alternatively, secure the runners using wood screws (Ø 3.5 mm or 4 mm). Ensure the runners are mounted completely level on both sides and at the exact same height.
4. Fitting the Front: If replacing a drawer side system, the old front fixing brackets must be unscrewed from the furniture front panel. Measure the exact positions for the new brackets. The new fixings are screwed to the front and subsequently clicked into the metal drawer sides.
5. Adjustment: A quality drawer system features multi-dimensional adjustment options. Use the adjustment screws on the drawer side or undermount locking device to adjust the front in height (± 2 mm) and sideways (± 1.5 mm) until the front reveal gaps are completely uniform.

FAQ – Frequently Asked Questions about Replacing Drawer Systems

Can I replace a single extension runner with a full extension runner? Yes, this is generally possible without issue, provided the installation width (the clearance between drawer box and carcase wall) and the nominal length match. A full extension offers significantly better convenience, as the entire contents of the drawer become visible and accessible.

Are Soft-Close and Push-to-Open the same thing? No. Soft-Close cushions the drawer during closing and pulls it smoothly shut. Push-to-Open pushes the drawer open when pressure is applied to a handleless front. In their purely mechanical forms, the two systems are mutually exclusive.

How do I measure the nominal length correctly? Nominal length is measured along the closed runner. On an existing drawer, measure from the inside face of the front panel to the rear panel of the drawer box. Standard dimensions are graded in 50 mm increments (e.g. 400 mm, 450 mm, 500 mm).

Can timber bases and back panels be reused when changing a metal drawer side system? That depends on the thickness of the chipboard. Many systems are designed for 16 mm thick bases. If the old system was compatible with Hettich InnoTech or ArciTech and the new sides require the identical cutting dimensions for base and back panels, the wooden components can be reused. Otherwise, new panels must be cut to size.