Shop our range of replacement Avantis door lock gearboxes for uPVC and composite doors. Ideal for repairing a failed or damaged multipoint locking system without replacing the complete door lock strip, these replacement centre cases are designed to match a variety of Avantis locking configurations.
Our Avantis gearbox range includes options for single and dual spindle applications, along with French door slave gearboxes for the secondary leaf of double-door installations.
When choosing a replacement Avantis gearbox, always compare the measurements and layout of your existing lock carefully. Important measurements include the backset, PZ centres, gearbox dimensions and spindle configuration.
Avantis Replacement Gearboxes
Our collection may include:
- Avantis replacement multipoint door lock gearboxes
- 35mm and 45mm backset options
- 92mm PZ and dual-spindle configurations
- Replacement gearboxes for uPVC doors
- Replacement gearboxes for composite doors
- Avantis French door slave gearboxes
- Gearboxes suitable for repairing existing Avantis multipoint locking systems
Replacing just the centre gearbox can often provide a practical and cost-effective solution when the original mechanism has failed but the remainder of the multipoint lock strip is still serviceable.
Not Sure Which Avantis Gearbox You Need?
Check the measurements of your existing gearbox carefully before ordering, particularly the backset, spindle-to-cylinder centres, case size and spindle layout.
If you’re unsure which Avantis replacement gearbox matches your existing door lock, please contact us with your measurements and, where possible, photographs of the original mechanism and we’ll help you identify the correct replacement
