Cylinder lock insert GERDA Wkładka symetryczna 31x31 mm nickel satin

GERDA symmetrical cylinder insert 31x31 mm in nickel satin finish is a compact locking core designed for doors that accept standard symmetrical cylinders. It provides a keyed locking function suitable for residential and light commercial doors, compatible with many mortise locks and multipoint mechanisms that require a 31x31 mm profile. The nickel satin surface offers a neutral appearance that fits modern and traditional door hardware.

Advantages

The cylinder insert delivers reliable mechanical operation with a symmetrical profile that eases installation and key operation from both sides. Its 31x31 mm dimensions make it a direct replacement for locks requiring the same size, while the nickel satin finish resists fingerprints and blends with a variety of door furniture. Designed by GERDA, the insert meets common functional expectations for durability and everyday use.

Suitable for

• Replacement of worn or damaged symmetrical cylinder inserts in residential doors
• Upgrading door security in apartments, houses, and small offices
• Use in mortise locks and multipoint locking systems that accept a 31x31 mm cylinder
• Doors requiring a neutral nickel satin exterior to match existing hardware

Key specifications

• Type: symmetrical cylinder insert
• Size: 31x31 mm (length measured on both sides from cam center)
• Finish: nickel satin
• Function: keyed lock core for mechanical door locking

How to use

To replace an existing cylinder, remove the door handle and retaining screw, withdraw the old cylinder, and insert the GERDA 31x31 mm cylinder so that the cam aligns with the lock mechanism. Secure the cylinder with the retaining screw and reassemble the handle. Check that the key turns smoothly and that the lock engages the latch and deadbolt correctly. For multipoint systems follow the door or lock manufacturer's guidance on cylinder positioning to ensure proper engagement.

Usage recommendations

Install and adjust the cylinder with the door in closed position to verify correct alignment; periodically lubricate the keyway with graphite or a dry lubricant and avoid oil-based lubricants to maintain reliable operation. If replacing a cylinder in a multipoint lock, confirm that the 31x31 mm size matches the lock case requirements before purchase.