Dismantling Cam Lock Fittings (Minifix): How to Remove Cams and Connecting Bolts Without Damaging Furniture Panels

A cam lock fitting consists of a circular cam housing and a connecting bolt; non-destructive dismantling requires turning the cam precisely anti-clockwise to unlock it and lifting it gently without putting pressure on panel edges.

Dismantling cabinet carcasses requires precision to avoid damaging delicate chipboard or MDF surfaces. The cam lock connector (often known under the brand name Minifix) is the standard fitting in modern cabinet making. It creates a rigid, concealed right-angle joint between engineered wood panels.

Whilst assembly is usually straightforward, taking units apart frequently causes issues. Stuck housings, stripped screw heads, or torn drill holes are typical damage patterns when using the wrong tools or excessive force. This guide is aimed at fitters and experienced tradespeople who need to separate, modify, or repair furniture components without causing damage.

The difficulty level of this task is low, but it demands patience and the correct torque. The time required per joint is around one to two minutes.

Required Tools and Materials

Heavy machinery is not needed for releasing cam connectors safely. Using precise hand tools prevents chipping the melamine-faced edges.

• PZ2 screwdriver: The drive on most connecting bolts and cam housings is designed for Pozidriv (PZ), and less commonly for Phillips (PH). A PZ2 tip fits the cross-recess profile accurately and prevents slipping.
• Slotted screwdriver (small): With a blade width of maximum 3 mm to 4 mm for gentle levering.
• Neodymium magnet: A strong magnet helps extract loose cams from their drill holes without direct contact.
• Masking tape / painters tape: Protects panel surfaces and edges when levering.
• Combination pliers: Used to grip connecting bolts if the drive was already rounded off previously.

Before dismantling the carcass fittings, remove all moving parts from the cabinet. Take off doors by unclipping or unscrewing the concealed cup hinges / cabinet hinges from their mounting plates. Also take out drawers, internal shelves, and any fitted cabinet legs to allow the carcass to lie flat and free of tension on the floor.

Step-by-Step Dismantling Guide

Separating the panels involves four distinct stages. Work systematically through all fittings on one carcass side before pulling panels apart.

Step 1: Unlock the Cam Housing

The circular cam housing sits in a 15 mm diameter drill hole. There is a small arrow or indicator mark on the face of the cam. Insert the PZ2 screwdriver and turn the cam anti-clockwise (usually around 180°). Like a key turning in a lock, the arrow must point directly towards the edge of the panel through which the connecting bolt passes. Only in this position does the internal ramp fully release the spherical head or ridge of the bolt.

Step 2: Separate the Panels

Once all cam housings on a panel side are unlocked, the components can be pulled apart. Draw the panel off straight and completely parallel to the axis of the bolts. Do not tilt or twist the panels. Tilting creates severe levering forces on the 5 mm shaft of the bolt, which inevitably tears out the core material at the panel edge.

Tip: If panels stick, tap gently on the inside face of the panel using the palm of your hand or a rubber mallet against a protective block.

Step 3: Remove the Cam Housing from the Hole

This step often causes the most surface damage because the housing sits tightly inside the 15 mm recess.

1. The magnet method: Place a strong magnet directly onto the metal housing and pull it vertically upwards. This is the safest method.
2. The tap method: Turn the panel over and tap gently on the rear side over a soft surface. The vibration frequently causes the cam to slide out on its own.
3. The lever method (only as a last resort): Apply a piece of masking tape to the edge of the hole. Insert the small slotted screwdriver into the cross-recess of the cam and lever it upwards with minimal force across the tape. Never lever directly against an unprotected melamine edge.

Step 4: Unscrew the Connecting Bolt

The connecting bolt is typically seated in a 5 mm hole aligned with the System 32 drilling pattern. Align the PZ2 screwdriver vertically. Apply firm downwards pressure while turning slowly anti-clockwise. This pressure is vital to prevent stripping the head. If the drive is already rounded, grip the shaft of the bolt (not the head) with combination pliers and screw it out manually.

Common Mistakes and Trade Tips

Working with engineered wood leaves little room for error. Keep the following technical points in mind to protect your furniture panels.

Incorrect tool drive: The most frequent error is using a PH screwdriver on PZ fixings. A Phillips drive (PH) has tapered flanks and cams out of the recess under higher torque. A Pozidriv drive (PZ) has parallel flanks and transmits torque effectively. A damaged bolt head makes reassembly extremely difficult.

Pulling apart too early: If the arrow on the cam is not aligned precisely with the bolt, the zinc die-cast fitting will still grip the bolt head. Pulling the panel with force at this point tears the entire bolt and its thread out of the mating panel.

Using cordless screwdrivers: Avoid power tools when removing carcass connectors. Breaking the initial torque on tight bolts requires manual control to avoid stripping the timber thread in the core.

Handling large carcasses: For tall units that may contain an espagnolette lock / rod lock or heavy drawer runners, dismantling must be carried out with the unit lying flat. Upright side panels will lean uncontrollably once fittings are loosened and tear out the remaining anchor points.

FAQ – Frequently Asked Questions About Dismantling

The cam housing spins freely without unlocking. What has happened? The internal ramp of the cam housing has broken (material fatigue in the zinc die-cast alloy). Apply slight pulling tension to the panel while turning the cam. Often the remainder of the internal track will catch and release the bolt head. The broken cam housing must then be replaced.

The connecting bolt spins without backing out of the timber. What should I do? The thread in the chipboard has stripped. Grip the bolt with pliers and pull outwards while gently turning. Before reassembly, plug and glue the hole with a timber dowel and re-drill, or fit a specialist repair bolt with a thicker Euro thread.

Can cam lock fittings be reused after dismantling? Yes, provided the internal ramp inside the cam is not worn and the cross recess on the bolt is intact. For older units, however, it is advisable to inspect metal components for hairline fractures and fit new replacement hardware if in doubt.

Which dimensions are critical when buying replacements? Key measurements are the cam housing diameter (usually 15 mm), the panel thickness (typically 15 mm, 16 mm, or 19 mm), the drilling diameter for the bolt (usually 5 mm), and its thread insertion length.

Related Components in Cabinet Making

When taking down an entire cabinet, you will encounter other hardware fittings alongside cam locks that must be dismantled correctly. Ensure hinges are removed cleanly from doors. Modern soft close concealed cup hinges often feature clip-on mechanisms where pressing the release tab at the rear unlatches the hinge arm from the mounting plate without any unscrewing needed.

Make notes on the positions of connectors and bolts during complex projects. This ensures that every fitting returns to its matching hole during reassembly, maintaining the full structural integrity of the carcass.