ABT Gibbons / ST Helens Replacement Gearbox 31mm – Without Snib

This is a replacement centre case gearbox designed for the ABT Gibbons and ST Helens door lock systems. If you're experiencing issues with your door lock, the gearbox is usually the culprit, and replacing it is a straightforward process of unscrewing a few screws.

ABT Gibbons Centre Case Details

• Key measurements: 31mm Backset / 48mm PZ Centres
• The mechanism inside the door that works with the handle.
• Most common cause of lock failure.
• Reversible latch for both left and right-handed doors.
• Dual Spindle – suitable for lever/lever or lever/pad configurations.
• Does not include a Snib or cover plate.

Technical Details

A complete technical diagram is available in the image gallery.