Piano mortise locks

What is a keyed mortise lock?
A key-operated mortise lock, also known as a key lock, is a type of mortise lock that operates using a so-called bearded key. This lock is mainly used for internal doors, cupboard doors and in renovation projects where the original character of the hardware must be preserved. Unlike cylinder locks, a keyboard lock does not have a separate cylinder; instead, the deadbolt is operated by the distinctive bearded key. Thanks to the unique keyway system – in which the key pushes a number of metal plates (keyways) into the correct position – the lock can be opened or closed.

Key-operated mortise locks are particularly popular in older homes and buildings, but are also used on new internal doors where a simple locking mechanism is sufficient. They offer a practical and cost-effective solution for situations where a high level of security is less important, but where privacy or the ability to lock the door is desired.
Where are pin-tumbler locks used?
Key-operated mortise locks are ideal for internal doors that need to be lockable, cupboard or storage doors, and for renovating older doors that already have a key-operated lock fitted. They offer a practical and cost-effective solution when a high level of security is less important, but privacy or the ability to lock the door is still required.
Variants and specifications of key-operated mortise locks
At Intergriff, you’ll find key-operated mortise locks in a variety of colours and finishes, so you can always match the lock to your door fittings and interior style. Our range comprises key-operated mortise locks with faceplates in:

Stainless steel – durable and neutral
Matt black – modern and sleek
Matt white – minimalist and fresh
Brass (PVD-coated) – classic and stylish
Bronze (PVD-coated) – warm and full of character
Matt gold (PVD-coated) – luxurious and eye-catching
Gunmetal (PVD-coated) – rugged and contemporary

All piano locks are supplied with keys and are available straight from stock. View the mortise locks category overview.
Tips for choosing
When purchasing a piano lock, always check the backset and the direction of rotation of the door. Also check that the dimensions match the existing lock hole, so that you can replace the lock easily.

A piano lock is a mortise lock that operates with a bearded key. This type of lock is mainly used on internal doors where a locking mechanism is required, without the need for a cylinder lock. If you are considering a modern alternative with a cylinder, take a look at cylinder mortise locks. You can then select the correct size and version from the matching profile cylinders.

What should you look out for when choosing a mortise lock?

The right choice usually starts with the existing door. If you’re replacing an old lock, it’s important that the new mortise lock fits as closely as possible to the cut-out and dimensions of the current lock. This will prevent unnecessary modification work to the door or frame.

• Dimensions – check that the lock’s dimensions and the faceplate fit the existing cut-out.
• Direction of rotation – check whether the lock is suitable for left- or right-hand doors, or whether it is universally applicable.
• Application – choose a model suitable for an internal door in a new-build or renovation project.
• Finish – match the faceplate to the rest of your door fittings for a harmonious and consistent look.

Suitable for interior doors and renovation projects

Key-operated mortise locks are often chosen for interior doors in the home, such as bedrooms or studies, and for renovation projects where an existing door is retained. It is precisely in these situations that the correct size and a familiar lock design are important. A piano lock is particularly practical when you want to be able to lock a door easily with a key whilst maintaining the existing layout. For bathrooms and toilets, you usually choose WC locks for a comfortable, private lock.

Finishes that complement your fittings

As well as the technical dimensions, the appearance also plays a role. In this category, you’ll find models with various faceplates, including variants in stainless steel and PVD finishes. This allows you to better match the lock to door handles, escutcheons and other fittings in the same style. Do you have a door with a keyhole? Then combine it with matching key rosettes for a neat finish.

Frequently asked questions about piano-key mortise locks

How does a piano lock work?

A piano lock works with a bearded key that operates the mechanism inside the lock. This allows you to open or close the door without a separate profile cylinder. This makes it a well-known and widely used solution for internal doors.

What sizes of mortise locks are available?

Mortice locks come in various sizes. For a suitable replacement, the dimensions of the lock and the faceplate are particularly important. You should therefore always compare the size of your current lock with the product specifications before ordering.

Is a keyhole lock secure?

A keyhole lock is primarily intended for internal doors where privacy or simple locking is required. For applications where a higher level of security is needed, a different type of lock is usually chosen from the range of locks and security products.

Can I replace a keyhole lock with a cylinder lock?

This is possible in some cases, but only if the door and the cut-out are suitable. As dimensions and installation methods may vary, it is advisable to first check carefully what type of lock is currently fitted to the door and what dimensions are required.