Furniture Locks & Showcase Locks: Suitable Replacements for Kika Cabinets

May 2, 2026

A furniture lock secures doors, flaps, or drawers, requiring the backset and cylinder diameter to match the existing drill holes in the furniture unit exactly when replaced.

Replacing or retrofitting locking mechanisms in furniture units demands precision. When a key snaps in existing cabinets – such as models compatible with standard Kika furniture – or when a cylinder jams or security needs upgrading, the replacement hardware must match the existing routing and material thickness precisely. This guide covers the technical specifications that are essential when choosing the correct furniture lock.

Key Buying Criteria for Furniture Locks

A lock cannot be fitted universally into every unit. Compatibility depends on strict dimensional requirements. Before purchasing, measure the following parameters on the unit or on the old, defective lock.

Backset

The backset is the most critical dimension for surface-mounted locks. It describes the distance from the centre of the keyhole (cylinder centre) to the outer edge of the lock case or door edge. Common measurements in cabinet making are 15 mm, 20 mm, 25 mm, 30 mm, or 40 mm. An incorrect measurement means the cylinder will not fit through the front hole or the bolt will fail to reach the striker plate on the cabinet carcase.

Cylinder Diameter and Cylinder Length

The cylinder diameter defines the size of the hole required in the furniture front. Standardised furniture lock cylinders often feature a diameter of 16.5 mm, 18 mm, or 19 mm. The cylinder length must match the material thickness of the front. For standard chipboard with a thickness of 18 mm or 19 mm, a cylinder of at least 20 mm to 22 mm in length is required so that the cylinder head sits flush with the front and the rosette can be fitted.

Handing and Door Stop

Furniture locks are often handed. A distinction is made between right-hand and left-hand locks, depending on which side of the door the hinges are fitted (right-hung or left-hung). Some modern surface-mounted locks are reversible, allowing the latch bolt to be rotated by loosening a screw on the back.

Keying Type: Keyed-Alike vs Keyed-to-Differ

When multiple cabinets are situated in one room, keying arrangements must be considered. Keyed-alike means that a single key opens all locks within the suite. Keyed-to-differ means that each lock features an individual cylinder profile and can only be operated with its own dedicated key.

Overview of Types and Options

Different locking mechanisms are used depending on the furniture type, construction, and material.

Surface-Mounted Lock / Cylinder Lock

The standard choice for classic timber or wood-based hinged doors. The lock case is screwed onto the inside of the door, while the cylinder projects outwards through a drill hole. Turning the key extends a deadbolt behind the striker plate mounted on the interior of the carcase.

Espagnolette Lock (Shoot-Bolt Lock)

For tall wardrobes, a single bolt in the centre is often insufficient, as the top and bottom of the door can be pulled away. A cupboard lock with rods solves this issue using multi-point locking. Turning the key moves two metal rods (usually with a 6 mm or 8 mm profile) upwards and downwards. Hooks at the rod ends engage into corresponding striker plates at the top and base of the wardrobe.

Showcase Lock

Glass doors require specialised solutions, as on-site drilling in glass risks breakage. A showcase lock for hinged doors is usually designed as a slip-on lock. It slides onto the glass edge (typical glass thickness 4 mm - 8 mm) with a clamping plate and protective rubber pads, secured using grub screws. For sliding glass doors, a ratchet showcase lock is used: a toothed bar clamps onto the rear glass pane, while the locking cylinder locks onto the bar, blocking the front pane.

Drawer Lock and Central Locking System

A simple drawer lock secures the top front against the cabinet top panel. In contrast, mobile pedestals and office filing cabinets often use a central locking system. Here, the cylinder sits in the top drawer front and operates a vertical aluminium bar inside the carcase. Locking pins on this bar engage simultaneously into the side runner mechanisms of all drawers, securing them at once.

Which Lock for Which Application? (Selection Guide)

If a standard wooden cabinet (e.g. a Kika sideboard) has a broken lock, then measure the backset and hole diameter and select a standard surface-mounted lock with matching dimensions.
If a cabinet door is taller than 1000 mm and needs a tight seal, then retrofitting an espagnolette lock is recommended to prevent door warping.
If a glass display cabinet without pre-drilled holes needs securing, then a clamp-on showcase lock is the technically sound choice.
If multiple drawers in an office pedestal need locking with a single turn, then a central locking system with an operating bar is required.

Installation Guide: Retrofitting or Replacing a Cupboard Lock

Replacing an identical lock is a straightforward task of unscrewing the old and fitting the new. However, retrofitting a lock from scratch requires precision. The cylinder must fit into the hole like a piston in an engine block – with no excess play, yet without binding.

Required tools:

Cordless drill
Forstner bit (matching the cylinder, often 19 mm)
Screwdriver (PZ2 or TX15)
Marking awl or pencil
Tape measure / try square

Step-by-step retrofitting for a surface-mounted lock:

Determine the position: Mark the backset dimension on the inside face of the door. Choose an ergonomically sensible height (usually centred).
Drill: Use the Forstner bit to drill from the front face (!) inwards to avoid tearing out the decorative finish on the visible side. Alternatively, drill from the inside until the centre point just emerges on the front, then finish drilling from the front.
Mount the lock case: Insert the cylinder through the hole. Align the lock square and screw the case onto the inside face using suitable chipboard screws (e.g. 3.5 x 16 mm).
Fit the rosette: Push or gently press the cylinder rosette onto the outer face. This covers any rough hole edges.
Fit the striker plate: Extend the bolt. Close the door slightly and mark the bolt position on the carcase. Screw the striker plate into position so that the bolt slides cleanly into the recess when locked, without rubbing against the edges.

Frequently Asked Questions (FAQ)

How do I measure the backset on a furniture lock correctly? On the inside of the lock, measure from the centre of the cylinder (keyhole) to the front edge of the lock case facing the door edge. This measurement in millimetres is your backset.

Can I install a showcase lock on sliding glass doors without drilling? Yes. Ratchet locks are used for sliding glass doors. The toothed strip is secured to the edge of the rear glass pane with a clamping screw and rubber buffer. The locking cylinder slides onto the bar, blocking the front pane. No glass drilling is required.

Which drill bit do I need for a cylinder lock? To produce clean, tear-free holes in chipboard or MDF, a Forstner bit is essential. A standard twist drill of that diameter would damage the material. The drill bit diameter must match the outer diameter of the cylinder exactly (typically 18 mm or 19 mm).

What is the difference between a pin tumbler cylinder and a wafer cylinder? Wafer cylinders (disc tumblers) are standard in furniture construction. They are compact and provide basic security. Pin tumbler cylinders feature spring-loaded internal pins, offering higher locking precision, more keying combinations, and greater resistance to tampering.

Can I replace the cylinder on a faulty lock without removing the entire lock case? With many modern furniture locks featuring interchangeable core systems, this is possible. A dedicated removal key allows the internal cylinder core to be unlocked and pulled out from the front. A new cylinder core can then be inserted until it audibly clicks into place.