Blum Hinge Replacement: Finding Compatible 35 mm Concealed Hinges

A concealed hinge with a 35 mm cup diameter and the standardised System 32 hole pattern can be replaced across different brands by compatible hinges, provided that the overlay type and opening angle match exactly.

Replacing defective or outdated cabinet hinges does not necessarily require buying the exact same brand from the original manufacturer. When an existing Blum hinge fails or needs an upgrade with integrated soft-close damping, purely physical and geometric parameters determine which replacement fitting will fit. Much like clamping a standardised drill bit into a chuck, the technical fit of the mounting determines compatibility, not the printed brand logo.

This guide breaks down the technical criteria for selecting the correct replacement hinge to ensure smooth installation and reliable cabinet door function.

Key Buying Criteria for Replacement Hinges

To identify the correct replacement part, the dimensions and geometry of the old hinge must be measured accurately. A vernier calliper is the ideal tool for this task.

The Cup Diameter

The most critical dimension is the diameter of the drilled recess in the cabinet door. The industry standard for standard and heavy-duty doors is 35 mm. Smaller doors, such as those on lightweight bathroom cabinets, occasionally use 26 mm. For standard replacement in kitchen or wardrobe applications, 35 mm concealed hinges are the necessary starting point. The cup drilling depth is usually between 11 mm and 12.5 mm.

The Overlay Type (Crank)

The overlay type defines how the closed door sits relative to the cabinet carcass side (side panel). Choosing the wrong overlay will prevent the door from closing properly or cause it to collide with adjacent fronts.

• Full overlay (also known as straight arm): When closed, the door covers almost the entire front edge of the cabinet side panel. The hinge arm is straight (0 mm crank). Suitable fittings are found under full overlay concealed hinges.
• Half overlay (also known as twin or dual overlay): Two doors share a single central cabinet divider. Each door covers only half of the front edge (approx. 7 mm to 9 mm) to leave a gap for opening. The hinge arm is slightly curved (approx. 9.5 mm crank). Corresponding models are listed under half overlay concealed hinges.
• Inset: The door sits flush with the front edges of the cabinet sides and fits inside the carcass. The hinge arm has a pronounced bend (approx. 18 mm crank). Inset concealed hinges are required for this setup.

Drilling Pattern and System 32

System 32 is the foundation of modern furniture manufacturing. The holes for the cruciform mounting plate in the cabinet side panel are spaced 32 mm apart and usually positioned 37 mm back from the carcass front edge. For the cup in the door, the fixing screw hole spacing varies slightly depending on the brand. Common centre-to-centre screw spacings are 45 mm, 48 mm, or 52 mm. If the new hinge features a different cup screw spacing, the old screw holes (usually 3 mm or 5 mm) should be filled and new pilot holes drilled. The main 35 mm cup recess remains completely unchanged.

Overview of Types and Options

Once the geometry (35 mm cup and the correct overlay type) is confirmed, the hinge functionality can be tailored to specific requirements.

The Opening Angle

The opening angle determines how wide the cabinet door swings open.

• 110°: The standard for most kitchen and living room cupboards. A replacement with 110-degree hinges is the correct choice in 80% of applications.
• 155° / 165°: These wide-angle hinges allow the door to open almost parallel to adjacent units. They are essential when internal drawers or pull-outs are installed behind the door (known as zero-protrusion hinges), as the opened door must swing completely clear of the internal carcass aperture. Matching models are found under 165-degree hinges.
• Special angles: For corner cabinets, specialised angles such as 30°, 45°, or 90° (blind corner hinges) are available.

Damping (Soft-Close)

Modern concealed cabinet hinges with integrated soft-close damping feature a built-in hydraulic piston within the hinge arm or cup. This slows the door down during the final centimetres of travel and pulls it quietly against the carcass. Note: Soft-close is a pull-in mechanism. It must never be confused with or combined with push-to-open (tip-on) mechanisms, as push-to-open operates on a push-out action requiring un-damped hinges (often with a reverse spring or free-swinging design).

Mounting Type: Clip-On vs Slide-On

With clip-on mounting, the hinge arm is pressed onto the carcass mounting plate without tools and snaps audibly into place. With older slide-on hinges, the arm must be slid over the plate and secured with a fixing screw. Clip-on fittings are strongly recommended for replacements, as they make door alignment and subsequent removal significantly easier.

Which Concealed Hinge for Which Situation? (Decision Guide)

Selecting the exact fitting follows a straightforward logic based on the existing setup:

• If a standard kitchen cupboard door (full overlay) slams shut and needs an upgrade, then choose a full overlay hinge with a 35 mm cup, 110° opening angle, and integrated soft-close damping.
• If a wardrobe features a central partition with a door mounted on both the left and right sides, then you must choose a half overlay hinge so both doors open without colliding.
• If a larder unit or pantry unit contains internal pull-out drawers, then choose a wide-angle hinge with 155° or 165° so the drawers do not catch on the door edge when pulled out.
• If the door sits flush inside the side panels, base, and top of the carcass, then choose an inset hinge.

Installation and Replacement Advice

Replacing a hinge requires precision and the correct approach.

Required tools:

• Cordless screwdriver or suitable hand screwdriver (PZ 2 or PH 2)
• Vernier calliper
• If necessary, a wood drill bit (3 mm) for pre-drilling new fixing holes
• If necessary, wood filler to plug old screw holes

Step-by-step procedure:

1. Removal: Release the door from the mounting plate using the clip mechanism at the rear of the hinge arm. Then unscrew the cup from the door and the mounting plate from the carcass side.
2. Replace the mounting plate: Always replace the cruciform mounting plate as well. Even if plates from different manufacturers appear identical, the locking lugs for clip-on mounting often differ by fractions of a millimetre. System 32 ensures that the new plate fits directly into the existing 5 mm hole rows of the carcass. Fixing is typically done with specialised Euro screws.
3. Insert the concealed hinge: Place the 35 mm cup into the door recess. Ensure it sits precisely square to the door edge. Fasten the cup with chipboard screws (typically 3.5 x 16 mm or 4 x 16 mm).
4. Clip on and adjust: Mount the door onto the plates. Modern hinges feature 3D adjustment. The front screw on the hinge arm adjusts the reveal between doors (lateral adjustment, usually +/- 2 mm). The rear screw (or cam) regulates the door depth relative to the carcass (depth adjustment, + 3 mm / - 2 mm). Height is adjusted via the mounting plate (+/- 2 mm).

Frequently Asked Questions (FAQ)

Can I replace a Blum hinge with a different brand? Yes. As long as the cup diameter (typically 35 mm), overlay type (e.g. full overlay), and opening angle match, the brand is irrelevant to functionality. It is simply essential that the hinge and mounting plate come from the same new brand, as clip-on mechanisms are rarely cross-compatible.

What is the difference between full overlay and half overlay? Full overlay is used when a door is mounted at the outer edge of a cabinet and covers nearly the full thickness of the carcass side. Half overlay is used when two doors share a single central carcass divider, with each door covering only half the edge.

How do I measure the cup diameter correctly? Remove the old hinge from the door. Use the internal jaws of a vernier calliper to measure the diameter of the round recess in the timber. On standard furniture, this measurement will be exactly 35 mm.

Do old mounting plates work with new hinges? Generally, no. The latching mechanisms on hinge arms differ between manufacturers and product series. Because hole spacings in cabinets follow standard System 32 dimensions, the old plate can easily be unscrewed and replaced with the supplied new plate.

Can I mix soft-close and standard hinges on the same door? Mechanically, this is possible provided both hinges share the exact same movement kinematics and pivot point (ideally from the same product series of the same brand). In practice, one soft-close hinge per standard door is often sufficient to achieve smooth damping.

Suitable Categories for Your Project

To find the exact replacement fitting for your cabinet project, browse the relevant technical specifications directly:

• All styles in one overview: Concealed hinges / cabinet hinges
• Filter by overlay type: Full overlay concealed hinges, Half overlay concealed hinges, Inset concealed hinges
• Filter by function: Concealed cabinet hinges with soft close damping
• Special angles for internal drawers: Concealed cabinet hinges 165 degrees