135° Corner Cabinet Hinges: Alternatives to Blum & Hettich Bi-Fold Solutions

November 1, 2025

A 135° hinge connects the two panels of a bi-fold door on corner cabinets, whilst a 165° hinge secures the entire door assembly to the cabinet carcass.

Corner Cabinet Hinges for Bi-Fold Doors: When This Fitting Is Required

Constructing an L-shaped corner cabinet in a kitchen or bedroom requires a specialised door mechanism. To provide full access to the interior – often fitted with a carousel or specialist pull-outs – bi-fold doors are used. These consist of two separate door leaves that fold together and swing to the side when opened.

This kinematic movement strictly requires combining two different hinge types in one system. A wide-angle hinge is mounted to the carcass itself, moving the door clear of the opening. The actual bi-fold hinge sits between the two door leaves. This is where 135-degree concealed hinges / cabinet hinges are used. They provide the precise folding angle needed so both front panels sit flush at a 90° angle when closed and do not rub against each other when opened.

What Are Blum & Hettich Bi-Fold Door Solutions?

Established brand manufacturers such as Blum (with the Clip top series) or Hettich (with Sensys or Intermat) have set the industry standard for professional cabinet making for years. Their solutions for bi-fold doors rely on precise coordination between the wide-angle hinge and the 135° connecting hinge.

These branded fittings typically use a standard cup diameter of 35 mm. They feature complex mechanical curves that guarantee smooth gliding of the door panels. A key feature of these systems is the integrated soft close mechanism, which enables silent closing of the substantial bi-fold door assembly. Furthermore, they offer tool-free clip-on mounting of the door to the carcass and fine 3D adjustment via eccentric screws.

What Are Compatible 135° Alternatives?

Compatible alternatives from specialist hardware suppliers are functionally and dimensionally identical fittings that do not carry the big brand names but are manufactured to the same industrial standards. A compatible concealed hinge for bi-fold doors uses the exact same 35 mm drilling diameter and adheres to the internationally standardised System 32 hole spacing for furniture construction.

These hinges are engineered to serve as direct replacements or as the primary fitting in new furniture projects. They also feature adjustment screws for gap alignment (depth, overlay, height) and are equipped with clip-on technology for quick attachment to the cruciform mounting plate. Anyone looking for an essential range of concealed hinges / cabinet hinges for cabinet making will find the identical mechanical operation here.

The Differences in Detail: Brand vs Alternative

When choosing between the original branded product and a compatible alternative, the following technical distinctions can help:

Drilling Pattern and Cup Dimensions: Both options use a cup diameter of 35 mm. The difference may lie in the screw hole centres on the cup. Brand manufacturers often use specific spacings (e.g. 45 mm, 48 mm, or 52 mm). Compatible alternatives often cover the most common spacings, so the exact measurement in millimetres on the existing furniture must be checked before replacing.
Adjustability: 3D adjustment is present in both systems. On premium brands, the threads of the eccentric screws often react marginally more directly, which makes fine adjustment by fractions of a millimetre easier on very heavy solid wood fronts. For standard MDF or chipboard fronts, this difference is barely noticeable in everyday installation.
Damping Mechanism: On modern concealed hinges / cabinet hinges with damping (Soft Close), the hydraulic cylinder is invisibly integrated into the hinge arm. Brand manufacturers have patented cylinders that close exceptionally smoothly regardless of temperature. Alternatives use proven standard cylinders that fulfil the same purpose, though their closing action may vary slightly by direct comparison.
Material Thickness: Branded fittings are tested for extreme load cycles (e.g. 200,000 opening cycles) in commercial settings and often feature a marginally greater material thickness in the hinge arm. For domestic residential applications, the steel alloys of alternative hinges are more than adequately dimensioned.

A branded hinge compares to a compatible model much like an original spare part does to an identically specified aftermarket component – the geometry of the fixing points determines the fit, not the stamped logo.

Which Solution Suits Which Scenario?

The choice of the right fitting depends heavily on the project and the budget.

When the branded solution makes sense: If an individual hinge breaks in an existing, high-end kitchen, choosing the exact same branded model is the safest route. The existing mounting plates can remain in the cabinet, and the new hinge simply clips into place. Similarly, if extremely heavy fronts made of solid timber are installed, top-tier series from brand manufacturers offer maximum stability.

When the compatible alternative makes sense: For complete new builds, interior fit-outs, or building workshop and hobby units, compatible alternatives are the logical choice. They deliver full technical functionality – including soft close and clip-on mounting – at a significantly more sensible material cost. Fitters also turn to alternatives when repairing older furniture where the original hinge is no longer available, replacing the hinge and mounting plate together as a complete set.

Suitable Alternatives for Cabinet Making

When selecting a replacement or fitting out new corner cabinets, attention must be paid to the correct mounting type. Bi-fold doors require the 135° hinge. It is essential not to confuse this with a standard hinge for a full overlay, which is only intended for simple, single overlay doors. Those planning regular doors will find standard solutions under full overlay concealed hinges.

To attach the entire bi-fold door assembly to the cabinet carcass, an additional wide-angle hinge is required. In this case, models with 155° or 165-degree concealed hinges / cabinet hinges are the technically correct counterparts to the 135° connecting hinge. Only the combination of these two angles allows the door to swing completely clear of the corner cabinet interior.

Frequently Asked Questions (FAQ)

Can I replace a broken branded hinge with an alternative? Yes, this is completely straightforward. The crucial factors are the 35 mm cup diameter and the fixing screw hole pattern. If these match, the hinge will fit into the existing routings. It is recommended to always replace the hinge and cruciform mounting plate together to ensure a secure fit.

Why do I need two different hinge types for a bi-fold door? The bi-fold door consists of two panels. The 165° hinge connects the first door to the side panel of the carcass and allows a wide opening angle. The 135° hinge connects the first door to the second door. It ensures that the second door wraps around the corner at a 90° angle when closed and folds together when opened.

How do I properly adjust a 135° hinge? Adjustment is carried out via the three screws on the hinge arm. The front screw adjusts the overlay (gap width between the doors). The rear screw secures the hinge to the mounting plate and adjusts the depth (distance from the carcass). Height is adjusted directly via the screws on the mounting plate.

Are 135° bi-fold hinges available with soft close? Yes, modern alternatives feature an integrated hydraulic damper. This slows the door down over the final few centimetres and pulls it gently into the closed position.