A set of metallic silver door lock center cases and gearboxes, displayed from different angles, showing the mechanism used in multipoint door locks.
Diagram illustrating how to measure a Mila uPVC door lock centre case gearbox, showing the "Backset" (A) and "PZ" (B) dimensions for correct fitting.
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A set of metallic silver door lock center cases and gearboxes, displayed from different angles, showing the mechanism used in multipoint door locks.Diagram illustrating how to measure a Mila uPVC door lock centre case gearbox, showing the "Backset" (A) and "PZ" (B) dimensions for correct fitting.

ERA Gearbox – Replacement Centre Case for uPVC Multipoint Door Lock – Fits ERA Saracen Surelock – 35mm/45mm Backset 92mm PZ

ERASKU: HS2830
Price:
£17.99

Key benefits

  • Replaces ERA Saracen Surelock - 35mm/45mm backset, 92mm PZ
  • Restores multipoint lock function - deadbolt and latch
  • Standard ERA dimensions - measure your case before ordering

100% SECURE PAYMENTS

HASSLE FREE RETURNS

FULLY TRACKED DELIVERY

Description

ERA Replacement Gearbox

This ERA centre case gearbox is a direct replacement for ERA, Saracen, Surelock, Laird and Fab & Fix multipoint door locks. It is the mechanism inside the door operated by the handle and is the most common part to fail.

Replacing just the gearbox is far more cost effective than buying a complete new lock. The centre case re-attaches to your existing locking strip.

Key Measurements

The most important measurements are 35mm or 45mm Backset and 92mm PZ.

This gearbox is non-handed with a fully reversible latch, fitting both left and right-handed doors.

Compatible Brands

Suitable replacement for ERA, Saracen, Surelock, Laird and Fab & Fix multipoint door locks.

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Frequently Asked Questions

The ERA door lock centre case gearbox is the core component of a multipoint locking system, responsible for controlling the handle and key operation. It ensures all locking points engage properly, keeping your uPVC or composite door secure.

Common signs include a stiff or floppy handle, difficulty turning the key, or the door not locking securely. These issues often indicate internal wear and should be addressed quickly. Learn more in Beginners Guide to uPVC Door Locks.

No, not all gearboxes are universal. You must check measurements such as backset, PZ centres, and overall design to ensure compatibility with your existing multipoint locking system.

Yes, in many cases you can replace just the centre case gearbox instead of the entire multipoint lock. This is a cost-effective way to restore your door’s functionality without changing the full mechanism.

Ignoring a worn gearbox can lead to complete lock failure, making your door difficult or impossible to open or secure. Replacing it early helps maintain security and prevents emergency lockouts.

About the Brand - ERA

ERA is one of the most established and trusted names in UK home security, known for delivering high-performance locks, door hardware, and smart security products that combine reliability with modern innovation. With over 180 years of expertise, ERA has built a reputation for creating security solutions that meet the needs of today’s homeowners—offering exceptional protection, ease of use, and long-term durability.

From multi-point door locks and high-security cylinders to window hardware and smart home security devices, ERA products are rigorously tested and certified to meet leading UK standards. Many items in the ERA range offer features such as anti-snap, anti-bump, and anti-pick technology, ensuring robust defence against common forced-entry methods.

Choosing ERA means investing in proven British security engineering, trusted by professionals and homeowners nationwide. Every product is designed to improve home safety, enhance performance, and deliver peace of mind—making ERA one of the most reliable brands in the HomeSecure range.

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