Replacement Parts and Compatible Fittings for Grass — Overview

A compatible replacement hinge strictly requires the identical cup diameter of 35 mm and a matching hole pattern within the 32 mm system in order to be mounted without drilling new holes.

Replacement Parts Suitable for Grass Fittings

When hinges lose tension, wall cabinet flaps no longer stay open, or drawer runners jam, mechanical components generally need replacing. To repair or retrofit existing furniture carcases, fittings are required that can serve as an alternative to Grass. Switching to compatible components is technically straightforward, provided fundamental parameters such as hole spacing, drillings, and installation dimensions match precisely.

What to Look for Regarding Compatibility? (Dimensions and Hole Patterns)

The primary standard in European furniture manufacturing is the 32 mm system. This modular grid defines that the distance between line drillings in the carcase side is always a multiple of 32 mm. When replacing fittings, align with these standard dimensions:

• Concealed hinge: The standard cup diameter for furniture doors is 35 mm. The drilling depth is usually 11.5 mm to 12 mm.
• Mounting plate: The drilling pattern for cruciform mounting plates is positioned 37 mm from the front carcase edge by default.
• Runner length: Drawer runner systems are produced in fixed standard increments. Typical lengths range from 250 mm - 800 mm.

Compatible Hinges and Dampers

A defective door hinge can be replaced with a standard concealed hinge. Before replacing, it is essential to determine the correct overlay type, as this dictates the crank of the hinge arm:

• Full overlay: When closed, the door fully covers the edge of the carcase side wall.
• Half overlay: Two doors share a single central divider panel (also called twin overlay).
• Inset: The door sits inside the carcase frame, flush with the carcase front edge.

Those wishing to modernise older doors can select hinges with integrated soft-close mechanisms that match Grass drilling patterns. Following installation, adjust the hinges using the eccentric screws on the mounting plate. These allow the door alignment to be adjusted in height, depth, and lateral overlay within a range of +/- 2 mm.

Suitable Runner Systems and Drawer Slides

When replacing drawer slides, matching the exact design type is crucial. Faulty concealed runners can be replaced with compatible undermount drawer runners if the nominal length (e.g. 500 mm) and the drawer side material thickness match.

A technical upgrade from a single extension to full extension drawer runners is frequently recommended during replacement. A full extension runner pulls out 100% from the carcase, providing full access to items stored at the back of the drawer. For wide drawers holding heavy cookware or crockery, heavy duty drawer runners with a defined load capacity in kg (e.g. 45 kg) must be selected.

When choosing operational features, consider the mechanical differences, as soft-close and push-to-open operate on opposite principles. For handleless fronts, push to open drawer runners are required. To ensure drawers with handles close gently and silently, opt for soft close drawer runners.

For extensive repairs where the drawer sides are also damaged, complete drawer systems offer a direct alternative to Grass drawers.

Flap Fittings and Gas Struts

Wall cabinets frequently utilise upward-opening flap fittings. If a flap loses hold and drops shut under its own weight, the pressure cylinder has worn out. A direct replacement for Grass lifters is possible provided the force rating matches the flap weight and front panel height. This force is measured in Newtons (N). Appropriate flap fittings or specific gas struts for heavy flaps rated at values such as 250 N or 320 N restore proper mechanical operation.

Installation and Retrofitting (Step-by-Step Guide)

Replacing standardised furniture fittings is like changing spark plugs in an engine: with the exact matching component and the right tools, it is a straightforward mechanical screw-fixing process requiring no complex modifications.

Required tools:

• Cordless screwdriver or hand screwdriver (PZ or TX drive)
• Rule or vernier calliper
• Bradawl

Steps:

1. Remove the old component. Measure the exact dimensions (length in mm, cup diameter, hole centres) using the vernier calliper.
2. Position the compatible replacement part. If the hole pattern matches the 32 mm system, the existing holes in the carcase can be reused directly.
3. If hole positions vary slightly: fill the old drill holes with wood filler or dowels. Mark the new position (e.g. 37 mm edge distance) and pilot with a bradawl.
4. Fix the new hardware in place using suitable chipboard screws (typically 4 x 16 mm or 3.5 x 15 mm).
5. Finally, align the door reveals and gaps using the adjustment screws on the fittings.

FAQ – Frequently Asked Questions About Replacements

Can I retrofit dampers onto old hinges? Upgrading is most efficiently achieved by replacing the entire hinge with a new concealed hinge featuring integrated soft-close. Clip-on dampers are often proprietary and fit only specific hinge arm profiles.

How do I correctly measure drawer runners for replacement? Always measure the nominal length of the slide in mm when fully closed. The runner must not exceed the internal carcase depth minus 3 mm to 5 mm of clearance.

Can standard roller runners be replaced with undermount runners? Changing runner designs requires joinery adjustments, as internal width requirements and drawer bottom construction differ. A like-for-like replacement with new roller drawer runners is the most reliable and fastest solution.