Maco uPVC Old Style Replacement Door Lock Gear Box Centre Case 35mm Backset

Maco Replacement Gearbox – 35mm Backset, 92mm PZ, Single Spindle Option

Key Specifications:

• Spindle to Key Measurement: 92mm
• Backset: 35mm
• Operation Type: Lever/Lever (single spindle option only)
• Locking Points: Connects to multi-point locking mechanisms
• Faceplate Dimensions: Compatible with 16mm or 20mm faceplates (faceplate not included)

Compatibility Notes:

This gearbox was commonly used in original Maco door locks, with updates made to the gearing system since around mid-2010. Gearboxes stamped with codes like 5STK followed by numbers, or variations such as 5ST, 5 STK, and 56231, often match this model. However, for accurate fitting, compare the detailed dimension drawing on the product page with your existing lock, focusing on screw fixing positions, as older and newer models differ.

Important Installation Advice:

• Latch Reversal: When reversing the latch, do not move the spindle after latch removal. This can trigger the spring and base retaining plate to dislodge, rendering the lock inoperable.
• If this occurs, you’ll need to remove the gearbox cover to reset it—a delicate task.
• Once the latch is reinstalled and secured, this issue will not happen.