Internal Pull-Out Drawers as an Alternative to Hafele — Compatible & Suitable

An internal pull-out is a concealed drawer fitted behind a cabinet door that organises storage space in base units and is frequently retrofitted using the standardised System 32.

When looking to enhance the functionality of existing kitchen units or bathroom furniture, interior pull-out systems are a popular solution. An internal pull-out designed to suit Hafele or similar established systems makes deep base cabinets ergonomically accessible. When selecting replacement parts or retrofitting components, brand names matter far less than exact technical specifications: hole spacing, internal installation widths, and the load capacity of the runners. In this guide, installers and experienced DIYers will learn how to choose and correctly fit suitable internal pull-outs as an alternative to Hafele.

What to Look for Regarding Internal Pull-Out Compatibility

For an internal pull-out to be compatible with Hafele or other systems, the mechanical interfaces inside the carcase must align. The hole pattern on the cabinet side panel acts as the DNA of cabinet making — it dictates precisely where and how fittings can be mounted.

System 32 and Clear Internal Width

Most modern cabinetry is built around System 32. This means the vertical drill holes in the side panel are spaced at exact 32 mm intervals. The distance from the front row of holes to the front edge of the cabinet is typically 37 mm. The standard diameter for these drill holes is 5 mm. When retrofitting an internal pull-out, you utilise these existing drillings to secure the cabinet runner profiles.

Another critical measurement is the clear internal width (the internal dimension of the cabinet). Cabinets are usually named after their external dimension (carcase width). To determine the clear internal width, subtract the thickness of both side panels from the overall carcase width. For example, for a 60 cm wide cabinet with 16 mm thick side panels: 600 mm - (2 x 16 mm) = 568 mm clear internal width. The fittings and spacer brackets of the internal pull-out must match this 568 mm measurement precisely to ensure smooth, tension-free movement.

Carcase Widths and Matching Pull-Out Systems

Standardised internal pull-out units are available for common kitchen cabinet widths. Ensure the selected set matches the respective cabinet width, as wire baskets and metal drawer boxes come in fixed dimensions.

• Narrow larder pull-outs and niches: A kitchen cabinet pull-out 15 cm or a kitchen cabinet pull-out 20 cm is ideal for bottles, spices, or baking trays. These setups often utilise asymmetrically mounted runners.
• Standard base cabinets: Classic food storage cabinets typically use a kitchen cabinet pull-out 30 cm or a kitchen cabinet pull-out 40 cm.
• Wide pan and crockery units: To hold heavy pans or stacks of plates, wider systems are required. A kitchen cabinet pull-out 50 cm or a kitchen cabinet pull-out 60 cm is suitable here. For these widths, the load capacity of the runner slides is particularly critical.

Drawer Runners: Full Extension, Load Capacity, and Soft-Close

The core component of any internal pull-out is the drawer runner. Anyone seeking an alternative to Hafele must evaluate the extension type and the kinematic properties of the slide.

Full Extension vs Single Extension

For internal pull-outs in base units, a full extension runner is the technical standard. A full extension runner extends 100% out of the carcase, giving unrestricted access to the very back of the basket or drawer. A single extension runner, on the other hand, stops at around 75% of the slide length, leaving the rear section inside the cabinet. When replacing drawers, upgrading to full extension drawer runners is always recommended.

Runner Types and Damping

Runners are primarily divided into ball bearing runners (mounted visibly on the side of the drawer) and undermount runners (concealed beneath the drawer base). Undermount runners offer greater lateral stability for wider pull-out units.

Furthermore, modern runners feature integrated damping (soft-close). This mechanism catches the drawer over the final centimetres of travel and pulls it shut smoothly and silently. Note: Soft-close must not be confused with push-to-open. Push-to-open (tip-on) ejects the drawer when pressure is applied to the front. These two mechanisms operate on opposing principles and can only be combined using specialised hybrid runner systems.

The Role of Concealed Hinges with Internal Pull-Outs

A common mistake when retrofitting internal pull-outs is overlooking the cabinet door. When an internal pull-out is pulled out from behind a hinged door, it must not collide with the open door or the hinge arm.

Standard concealed hinges typically have an opening angle of 110°. At this angle, the door edge often protrudes slightly into the clear internal width of the cabinet. For internal drawers, specialised wide-angle hinges — often referred to as zero-protrusion hinges — are required. These swing the door completely clear of the opening path. Suitable options include 155 degree concealed cabinet hinges or 165 degree concealed cabinet hinges.

The standard hinge cup diameter is 35 mm. When installing these, opting for models with integrated damping, such as soft close concealed cabinet hinges, prevents the door from slamming against the carcase.

Installation and Assembly: Retrofitting an Internal Pull-Out

Installing an internal pull-out as an alternative to Hafele requires precision. The runner profiles must be mounted exactly parallel and level.

Required tools:

• Cordless screwdriver with PZ or TX bits
• Tape measure and try square
• Spirit level
• Bradawl or centre punch
• Suitable wood screws (typically 4 x 16 mm) or Euro screws (for 5 mm holes)

Step-by-step procedure:

1. Dismantling: Remove existing internal shelves and temporarily detach the cabinet door (clip-on hinges can be removed without tools).
2. Marking out the height: Determine the position of the pull-outs. Ensure sufficient clearance above the unit for tall items (e.g., stockpots).
3. Mounting the runners: Position the carcase runners against the side panels. Use Euro screws if you are working with System 32 hole patterns. Important: For internal drawers behind hinged doors, the runner on the hinge side often requires a spacer bracket so the drawer does not scrape against the hinge mechanism during opening.
4. Fitting the drawer: Fasten the drawer runners to the wire basket or timber drawer box. Insert the pull-out into the cabinet runners and check for smooth operation.
5. Checking the hinges: Reattach the door. If the pull-out snags on the door edge, replace the existing hinges with wide-angle zero-protrusion hinges (155° or 165°).

Frequently Asked Questions (FAQ)

Can I install an internal pull-out into any base cabinet? Yes, provided the clear internal width of the cabinet matches the dimensions of the pull-out and there is sufficient installation depth. Standard runners generally require a cabinet depth of at least 500 mm. Always check for obstructions such as waste traps or gas pipes at the back of the unit.

How do I check if a fitting is compatible with Hafele? Inspect the hole pattern of the drawer runners. If the runners conform to System 32 (32 mm hole spacing, 37 mm distance from the front edge), they will fit seamlessly into cabinets previously equipped with Hafele components. Technical compatibility is determined purely by geometric dimensions.

Which hinge do I need if the internal drawer catches on the cabinet door? You will require a wide-angle zero-protrusion hinge. This hinge type pulls the door fully clear of the cabinet's internal opening width. The opening angle should be 155° or 165°.

What is the standard load rating of an internal pull-out? For kitchen base cabinets, drawer runners with a dynamic load rating of 30 kg to 45 kg are standard. For very wide units (such as 60 cm or 80 cm) carrying heavy cookware, heavy-duty slides with a load capacity of up to 60 kg should be selected.