What Is 32mm Spacing in Joinery?

If you work in cabinetry, furniture, shopfitting, or bespoke joinery, you will come across the 32mm system sooner or later. It is one of those small technical details that quietly sits behind a huge amount of modern furniture manufacturing.

At first glance, 32mm spacing might just look like a row of shelf peg holes. In reality, it is a simple but powerful system used to control the position of shelves, hinges, drawer runners, fittings, and cabinet hardware.

What does 32mm spacing mean?

The 32mm system is based around a repeated vertical hole pattern, typically drilled into cabinet side panels. The holes are usually spaced at 32mm centres, meaning the distance from the centre of one hole to the centre of the next is 32mm. These holes are commonly 5mm in diameter and are used for adjustable shelves, hinge plates, drawer runners, and other cabinet fittings.

This system is most commonly associated with European-style frameless cabinetry, but it is widely used across modern cabinetmaking, fitted furniture, wardrobes, kitchens, commercial joinery, and shopfitting.

Why 32mm?

The main reason is consistency.

When cabinet holes, fittings, runners, and hinges are all designed around the same spacing, the whole manufacturing process becomes easier to control. Instead of marking out every shelf, hinge plate, or runner position manually, the cabinet can be designed around a predictable grid.

This allows a workshop to move from “one-off measuring” to a more repeatable manufacturing process. It helps with CNC programming, line boring, assembly, hardware fitting, and future adjustment.

The 32mm system became closely linked with line-boring machinery, where multiple holes can be drilled accurately and repeatedly in one operation. Commercial cabinet shops often use machines or drilling systems that create rows of holes at 32mm centres.

Where is 32mm spacing used?

The most obvious use is adjustable shelving. A row of 5mm holes allows shelf pins to be moved up or down in 32mm increments, giving flexibility without needing to remake the cabinet.

However, the system goes much further than shelves. In a properly planned 32mm cabinet, the same logic can be used for:

• Shelf pin holes

• Concealed hinge mounting plates

• Drawer runner positions

• Internal fittings

• Wardrobe accessories

• Pull-outs and storage systems

• Some construction and assembly fittings

Many modern furniture fittings are designed to work with this type of cabinet drilling pattern, which is why the system is so valuable for repeatable manufacture.

The importance of the 37mm setback

A common partner dimension to the 32mm system is the 37mm front setback. This refers to the distance from the front edge of the cabinet side to the centre line of the front row of system holes.

In many overlay cabinet systems, the front row of holes is positioned 37mm back from the front edge. This allows hinge plates, drawer runners, and other fittings to align correctly with standard European hardware.

That said, 37mm is not a universal rule for every cabinet. Inset doors, special construction methods, different hardware brands, or bespoke detailing may require alternative setbacks. The key is that once the setback is chosen, it should be used consistently across the design and manufacturing process.

Why joinery workshops use the 32mm system

The biggest advantage of the 32mm system is that it reduces guesswork.

For a workshop, this means:

Faster production
Cabinet sides can be drilled using repeatable setups, CNC programs, or line-boring machines.

More accurate fitting
Hardware positions are controlled by a system rather than by repeated manual marking.

Better consistency
Matching cabinets, doors, drawer fronts, and internal fittings become easier to standardise.

Easier adjustment
Shelves and some fittings can be moved without additional drilling.

Improved digital workflow
CAD, CAM, CNC, and manufacturing drawings can all be built around the same rules.

This is why the 32mm system is so useful for modern joinery businesses. It turns cabinetmaking into a more controlled process, especially when combined with parametric CAD, CNC machining, and standardised hardware libraries.

32mm spacing and CNC manufacturing

For CNC-based joinery, the 32mm system is especially useful.

Once the cabinet side panel has been modelled correctly, the hole positions can be driven automatically from the CAD model or library component. This reduces the need for manual programming and makes it easier to create repeatable products.

For example, a base cabinet, wardrobe side, tall unit, or office storage unit can all share the same logic. The size may change, but the hardware positions still follow the same manufacturing rules.

This is where the 32mm system becomes more than a drilling pattern. It becomes part of a wider manufacturing framework.

Is 32mm spacing only for mass production?

No.

Although the 32mm system is often associated with flat-pack furniture and large-scale production, it is also useful in bespoke joinery. Even when every project is different, having a consistent internal system makes the design and manufacturing process cleaner.

A bespoke joinery company does not need to make everything look standard. The visible design can still be completely custom. The 32mm system simply helps control the hidden technical side of the work: drilling, hardware, cabinet construction, and future adjustability.

In other words, the customer sees a bespoke kitchen, wardrobe, or interior fit-out. The workshop benefits from a repeatable, reliable manufacturing method.

Common mistakes with the 32mm system

One of the biggest mistakes is treating 32mm holes as “just shelf holes.” If the hole rows are not planned properly, they may work for shelves but fail to align with hinges, drawer runners, or internal fittings.

Another common mistake is mixing systems without realising it. A cabinet might have shelf holes on one logic, hinge plates on another, and drawer runners positioned manually. This can work for a one-off job, but it becomes inefficient when trying to build a repeatable library or manufacturing standard.

A better approach is to decide the rules first:

• What is the front hole setback?

• Will the rear holes follow the same logic?

• What hole diameter and depth will be used?

• Which hardware brands are being designed around?

• How will drawer runners, hinges, and shelves align?

• Will the system be used across all cabinets or only selected ranges?

Once those rules are clear, the 32mm system becomes much easier to manage.

Why it still matters today

The 32mm system remains important because modern joinery is becoming more digital, more automated, and more systemised.

Workshops are no longer relying only on hand-marking and traditional bench methods. They are using CAD libraries, CNC machines, nesting software, automated reports, hardware databases, and digital manufacturing workflows.

The 32mm system fits perfectly into this environment. It gives designers, CAD technicians, and manufacturers a shared technical language. It helps ensure that what is drawn can be manufactured accurately, assembled efficiently, and adjusted if needed.

Final thoughts

The 32mm system is simple, but powerful.

It is not just about drilling holes every 32mm. It is about creating a consistent manufacturing logic for modern cabinetry and joinery. When used properly, it can improve accuracy, reduce workshop time, simplify hardware fitting, and make digital manufacturing far more reliable.

For bespoke joinery companies, the real value is not in making every cabinet standard. The value is in using a standardised hidden system to deliver custom work more efficiently.

That is why 32mm spacing remains one of the most important principles in modern cabinetmaking.