Drawer System as an Alternative to Blum Antaro — Compatible and Matching

A compatible drawer system as an alternative to Blum Antaro uses standardised drilling patterns such as System 32 and identical nominal lengths to enable a precise replacement in existing kitchen cabinets.

When replacing defective runners during kitchen installation or furniture repair, or when assembling new cabinets, the question of matching fittings frequently arises. The double-walled metal drawer side system Blum Antaro is installed in many kitchens. However, there are numerous drawer systems available on the market that act as an alternative to Blum Antaro and feature identical installation dimensions and comparable running smoothness. For joiners and experienced fitters, exact technical specifications are essential when replacing components: nominal length, carcase width, load capacity, and runner type.

What to Consider for Compatibility

To ensure a replacement for Blum Antaro fits smoothly into an existing cabinet carcase, mechanical and geometrical parameters must match precisely. Directly interchanging individual components (for example, combining a new runner with an old drawer side) is generally not possible across different manufacturers. Therefore, the complete system comprising carcase runner, drawer side, and front fixing brackets is always replaced together.

System 32 and the Hole Pattern

The industry standard for furniture construction is System 32. This modular grid defines the spacing of drilled holes in the carcase side panels.

• The distance from hole centre to hole centre is exactly 32 mm.
• The distance from the front row of holes to the front edge of the carcase is standardly 37 mm.

A system compatible with Blum Antaro uses precisely this hole pattern. For installation, this means existing drill holes in the cabinet can usually be used directly for the new carcase runners without having to drill new holes or fill old ones.

The Nominal Length (NL) of the Drawer

The nominal length defines the depth of the drawer and thus also the length of the carcase runner. It must match the internal clear depth of the cabinet. Common dimensions in kitchen construction range between 270 mm - 650 mm. For example, if you are replacing a defective runner, measure the old runner from the front edge to the rear end. A dimension of 400 mm strictly requires drawer runners 400 mm as a replacement fitting. If the runner is too long, the drawer will not close; if it is too short, you waste valuable storage space.

Load-Bearing Capacity

Kitchen drawers must withstand significant weight. Pots, pans, and crockery quickly add up to substantial loads. Standard runners are usually designed for a dynamic load capacity of 30 kg. For wide pan drawers over 60 cm in width or larder units, heavy-duty drawer runners should be used, offering a load capacity of 40 kg, 50 kg, or more.

The Right Runner Technology: Extension and Damping

Modern drawer side systems rely almost exclusively on undermount runners. In contrast to visibly mounted ball bearing runners or roller runners on the side, the mechanism here runs concealed beneath the drawer base. Undermount drawer runners protect the roller carriages from dirt and provide a clean appearance when opened.

Full Extension vs. Partial Extension

A full extension runner pulls out 100% from the carcase. The user has unrestricted access to the entire contents right to the back corners of the drawer. A partial extension runner, by contrast, stops at approximately 75% of the nominal length; the rear area remains hidden inside the cabinet. When planning kitchen cabinets, full extension drawer runners are the standard choice because they significantly improve ergonomics.

Soft-Close and Push-to-Open

These two mechanisms are often confused, but in their purely mechanical form they are mutually exclusive.

• Soft-Close: This is a damping mechanism. Drawer runners with soft close catch the momentum of the drawer over the final centimetres (usually from approx. 50 mm before closing) and pull it gently and quietly into the carcase. This matches Blum Antaro systems, which also operate with integrated damping (Blumotion).
• Push-to-Open: This mechanism is designed for handleless frontals. Light pressure on the front triggers a mechanical spring that pushes the drawer open slightly. In their standard design, push to open drawer runners do not feature a self-closing mechanism with damping, as the momentum is required to re-tension the spring for the next opening cycle.

Matching Systems for Standard Kitchen Cabinet Widths

The width of the kitchen cabinet largely dictates the dimensions of the drawer base and rear panel. These components are typically made from 16 mm thick melamine-faced chipboard and must be cut to size by the joiner. The cutting calculation formulas depend on the specific drawer side system, but are always based on the internal carcase width (clear internal width).

Standardised solutions exist for typical cabinet widths (external dimensions with 16 mm or 19 mm carcase thickness):

• A kitchen cabinet pull out 60 cm is the classic dimension for hob base units and standard drawer stacks.
• Narrower variants such as the kitchen cabinet pull out 40 cm or the kitchen cabinet pull out 30 cm are often planned next to the cooker for spices or cutlery.

Installing and Retrofitting a Replacement Drawer System

Replacing a defective system with an alternative to Blum Antaro requires precise workmanship, but is straightforward thanks to standardised components.

Required Tools

• Cordless screwdriver with PZ2 bit (Pozidriv)
• Folding rule (tape measure) and try square
• Wood drill bits (5 mm for Euro screws, 3 mm for pilot drilling wood screws)
• Rubber mallet

Step-by-Step Replacement

1. Dismantling: Remove the old drawer from the carcase. Unscrew the old carcase runners.
2. Measuring and Marking: Check the hole pattern. If System 32 is present, the new carcase runners can be positioned directly on the 37 mm row. Ensure the correct mounting height so the front sits flush with neighbouring cabinets later.
3. Fitting the Runners: Secure the new undermount runners to the side panels using Euro screws (for 5 mm holes) or wood screws (3.5 mm or 4 mm).
4. Drawer Assembly: Cut the base and rear panel (usually 16 mm chipboard) precisely to the specifications of the new system. Screw the metal drawer sides to the base and rear panel.
5. Front Fitting: Attach the front fixing brackets to the cabinet door/front and clip the front onto the drawer sides.
6. Adjustment: Aligning the fronts is like adjusting the wheel tracking on a car — a few millimetres make all the difference for a perfect fit. Using the adjustment screws on the drawer sides, the height (typically ± 2 mm), side alignment (± 1.5 mm), and tilt can be adjusted precisely until the reveal gaps are completely parallel.

Frequently Asked Questions (FAQ)

Can I combine old Blum carcase runners with drawer sides from another manufacturer? No. The mechanics of the undermount runner, locking clips, and drawer side profiles are manufacturer-specific. When installing an alternative to Blum Antaro, the carcase runner, drawer side, and front fixing brackets must be replaced completely as a set.

How do I determine the correct nominal length for a replacement? Measure the length of the metal carcase runner screwed firmly to the cabinet side wall, from the front edge to the rear end. If the dimension is 500 mm, you require a new system with a nominal length of exactly 500 mm.

Do I need to drill new holes in the cabinet for a new drawer system? In most cases, no. If the cabinet was manufactured to System 32, the drill holes on the new carcase runners will match the existing grid. Only when attaching the front clips to the drawer front might new pilot holes, offset by a few millimetres, be required.

What is the difference between a drawer side and a runner? The runner (or carcase rail) is the mechanical component with rollers or ball bearings screwed firmly inside the cabinet. The drawer side is the lateral wall of the drawer itself (usually made from powder-coated steel) that slides onto the runner and encloses the wooden base and rear panel.