Avantis Door Lock Gearbox – 35mm / 45mm Backset, 92/62mm PZ

Replace a faulty or worn locking mechanism with this Avantis door lock case gearbox, designed for compatible uPVC and composite door multipoint locking systems.

Available with a 35mm or 45mm backset, this replacement centre lock case features a 92mm top PZ, 62mm bottom PZ, 8mm spindle and Euro profile cylinder configuration.

Replacing the centre gearbox can be a cost-effective solution when the main multipoint lock case has failed, helping avoid replacement of the complete locking strip where the existing mechanism is otherwise serviceable.

Avantis Gearbox Specifications

• Backset: 35mm or 45mm
• Top PZ: 92mm
• Bottom PZ: 62mm
• Case Height: 212mm
• Case Width: Backset + 15mm
• Spindle: 8mm
• Cylinder: Euro Profile
• Suitable For: Compatible uPVC & Composite Doors

Top PZ Measurement: Centre of top spindle to centre of Euro cylinder.

Bottom PZ Measurement: Centre of bottom spindle to centre of Euro cylinder.

Why Choose This Avantis Lock Case?

• Direct replacement option for compatible Avantis locking mechanisms
• Choice of 35mm and 45mm backset
• Suitable for many uPVC and composite door applications
• Dual spindle configuration
• Euro profile cylinder fitting
• Ideal for locksmiths, door repair professionals and property maintenance
• Replace the failed centre gearbox rather than the complete multipoint strip where compatible

Is Your Door Lock Gearbox Faulty?

A replacement gearbox may be required if:

• Your door handle has become stiff
• The handle moves but the locking points do not operate
• The key turns but the door does not lock correctly
• The multipoint mechanism is difficult to engage
• The existing centre lock case has failed internally

Check Your Lock Before Ordering

Door lock gearboxes can look very similar but have different dimensions. Please compare your existing lock carefully before ordering.

Check the:

35mm or 45mm backset 92mm top PZ 62mm bottom PZ 212mm case height 8mm spindle Euro profile gearbox shape fixing points

Selecting the correct measurements is essential for compatibility.