Product Description

Trusted British Security for Every Door

A Union mortice lock represents the gold standard in British lock manufacturing. With a heritage spanning over 175 years, Union has been protecting homes and businesses with precision-engineered mortice locks that combine traditional craftsmanship with modern security technology. Whether you need a simple latch for an interior door or a high-security BS3621 sashlock for your front door, a Union mortice lock delivers the reliability and peace of mind that comes with a name trusted by locksmiths, architects, and homeowners alike.

A mortice lock is installed by recessing (mortising) the lock body into the edge of the door, providing a clean, flush appearance and superior security compared to surface-mounted alternatives. Union mortice locks are manufactured to exacting standards and tested rigorously to ensure they meet the demands of real-world use. From the internal mechanism to the external finish, every component is designed for durability, smooth operation, and long service life.

Types of Union Mortice Locks

Union produces a comprehensive range of mortice locks to suit every door and application:

Mortice Sashlocks

The classic Union mortice sashlock combines a latch bolt (operated by a handle) with a deadbolt (operated by a key). It is the most common type of lock for exterior doors in the UK. Union sashlocks are available in 2-lever, 3-lever, and 5-lever versions, with 5-lever models meeting the rigorous BS3621 standard for thief-resistant locks. Many models are also available in fire-rated versions.

Mortice Deadlocks

A Union mortice deadlock provides a single deadbolt operated by a key, with no latch. It is often used in addition to a latch or as a secondary lock on exterior doors. Deadlocks offer excellent security and are available in various sizes and finishes.

Mortice Latches

A Union mortice latch provides a spring-loaded latch bolt operated by a handle, with no locking mechanism. It is ideal for interior passage doors, closets, and hallways where security is not required.

Union motice lock F 714

Bathroom Locks

A Union bathroom lock is a mortice lock designed specifically for bathroom and toilet doors. It features a thumb turn or snib on the inside for privacy, with an emergency release on the outside for safety.

Union motice lock F 714

Multi-Point Locks

Union multi-point locks, such as the StrongBOLT range, provide multiple locking points along the door edge for superior security. These locks are ideal for exterior doors and are often used in conjunction with a cylinder for keyed access.

Key Features and Benefits

• Trusted British Brand: Union has been manufacturing locks since 1840 and is one of the most recognised names in security.

• BS3621 Certified Options: Many Union mortice locks meet the British Standard for thief-resistant locks, required by most home insurance policies.

• Durable Construction: Made from high-quality steel, brass, and zinc alloy for long-lasting performance.

• Precision Engineering: Smooth key operation and reliable bolt engagement.

• Multiple Finishes: Available in Polished Brass, Satin Chrome, Antique Brass, Black, and more.

• Complete Range: From simple latches to advanced multi-point systems, Union has a mortice lock for every door.

• Fire-Rated Options: Many models are available in fire-rated versions for commercial and multi-occupancy buildings.

Technical Specifications

Applications

Union mortice locks are suitable for:

• Residential Properties: Front doors, back doors, interior doors, bathrooms

• Commercial Buildings: Offices, retail, hospitality, healthcare

• Educational Facilities: Schools, colleges, universities

• Heritage Properties: Period homes, listed buildings, cottages

• Industrial Sites: Warehouses, factories, storage units

Installation Guide

Installing a Union mortice lock requires precision and the right tools. For best results, we recommend hiring a qualified carpenter or locksmith.

Tools Required:

• Drill with various bits (including spade bits for morticing)

• Chisels (various sizes)

• Mallet or hammer

• Screwdriver

• Tape measure and pencil

• Mortice gauge

Step 1: Mark the Door
Position the lock at your desired height (typically 900-1000mm from the floor). Mark the center of the keyhole and spindle on both sides of the door.

Step 2: Drill the Keyhole and Spindle Holes
Drill the keyhole (typically 25mm) through the door. Drill the spindle hole (typically 8mm) through the door at 90 degrees to the keyhole.

Step 3: Mortice the Lock Case
Mark the outline of the lock case on the door edge. Drill out the bulk of the mortice using a spade bit, then chisel to the exact depth and shape. The lock case should slide in with a snug fit.

Step 4: Install the Lock Body
Insert the lock into the mortice. The faceplate should sit flush with the door edge. Secure with the provided screws.

Step 5: Install the Strike Plate
Close the door and mark the position of the latch bolt and deadbolt on the door frame. Mortice the frame to accept the strike plate. Secure with screws.

Step 6: Install Handles and Cylinder
Attach your chosen handles and escutcheons. Insert the cylinder (if applicable) through the lock body and secure it.

Step 7: Test the Operation
Test the latch and deadbolt with the door open and closed. Ensure the key turns smoothly and the bolts engage the strike plate without binding.

Maintenance and Care

• Lubrication: Apply a dry graphite lubricant to the keyway and bolt mechanism annually. Do not use oil or WD-40, which can attract dust and gum up the mechanism.

• Cleaning: Wipe with a soft damp cloth. Avoid abrasive cleaners that may scratch the finish.

• Key Care: Keep spare keys in a safe place. If you lose a key, consider re-keying or replacing the cylinder for security.

• Inspection: Check the lock annually for signs of wear, loose screws, or sticking bolts. Address any issues promptly.

For dependable security backed by over 175 years of British manufacturing heritage, choose a Union mortice lock for your door.