Window Mechanisms

New Double Glazing Window Locking Mechanisms

Double glazed windows are amazing for your home, with added noise reduction, increased warmth and excellent security with proper window locks, but one thing that can go wrong is that the locking mechanism on your windows can break over time. The good news is that you don’t have to replace the whole window if this happens. It is possible to simply buy the locking mechanism and replace just that instead, giving you a far cheaper option for continued window security and ease of operation.

GB DIY Store are experts in providing window locking mechanisms for double glazed windows, with years of experience in helping customers - both trade and non-trade - find what they need. We do everything we can to ensure a wide range of well-stocked locking mechanisms, from the very best manufacturers out there, including Kenrick, Avocet, Siegenia and Maco, ensuring you receive only quality goods that will last for years.

Browse our range of locking mechanisms below and we’re sure you’ll find what you need. If you’re new to repairing your own windows or having trouble deciding which mechanism you need, we’d be happy to help. You can either speak to us on WhatsApp on 01623 622205 or send us an email to [email protected], and all we need to help you buy the right mechanism is a simple photo of your existing one. It really is that easy!


What Are Replacement Window Locking Mechanisms?

Basically, the bit that makes your window locks work! Or a little more technically, uPVC window mechanisms are the gearing part located on the inside of a window that's driven by the handle you turn to open and shut your windows.

If you look at our range of mechanisms, you can click on the name of each one for more details on the type of lock, the sizes and what windows each locking mechanism will fit. There’s also a helpful diagram to show the measurements for each part of the mechanism, which may help you in selecting the right one for your windows.

And if you get stuck, when choosing what lock mechanism you need, you can always give our experts a call, chat to us on WhatsApp or send us an email. We’re always happy to help!

View our range of uPVC window mechanisms below. We offer great prices for domestic customers and trade customers, with discounts for bulk buying and free delivery if you spend over £75.00.


Buy uPVC Window Mechanisms

We have a great range of window mechanisms from some of the best manufacturers in the business, including Kenrick, Siegenia and Maco. We only stock high-quality items from the best of the best, ensuring your peace of mind no matter what you buy from us, and we take particular care with our security items such as these window locking mechanisms. We aim to provide our customers with everything they need for their windows at an excellent price.

Pricing for our window mechanisms start at only £4.80, including VAT, and the price we list is the price you pay. We don’t like to show prices without VAT and then spring the addition of VAT on you later at checkout. We don’t think that’s a fair way to list our prices and aim to be as clear and transparent as we can regarding the cost of all items on our site. We can also provide a bulk-buy discount whether you’re doing a one-off large order or you’re a regular trade customer, and we’re delighted to offer free delivery if you spend £75.00 or over.

We have a range of backset sizes (20mm, 22mm, and 25mm,) and lengths from 250mm right up to 1000mm, and we’re sure you can find what you need in our online store.

Some of our window locking mechanisms can also be used on aluminium and timber windows, as well as uPVC windows, so do check our range no matter what type of windows you have.


Types of Replacement uPVC Window Lock Mechanisms: 

We have a good range of window lock mechanisms in different sizes, all in stock and ready and waiting for your order.

Browse below for all you could want to fix your windows and get the locks working again.

You’ll find:

Drive Gear Replacement Gearboxes

Window Locking Mechanism Gearboxes

Window Lock Espag Gearbox Drive Gear Mechanisms

Offset Espag Rod U Rail Window Locking Mechanisms and more


We’re a family-run company and we take great pride in excellent customer service, with quick delivery, quality products and great levels of stock so you can always find what you need.

Browse our full range of window locking mechanisms below.

Avocet Inline Espag Rod Window Locking Mechanism

Avocet Inline Espag Rod Window Locking Mechanism

Inline Espagnolette Window Lock A standard espag locking mechanism manufactured by Avocet. This..

£4.79 Incl VAT

Details
Avocet Offset Espag Rod U Rail Window Locking Mechanism

Avocet Offset Espag Rod U Rail Window Locking Mechanism

Avocet Offset Espag Rod U RailA standard offset U Rail espag locking mechanism manufactured by Avoce..

£4.79 Incl VAT

Details
Kenrick Centurion Window Locking Mechanism Gearbox 20mm Backset

Kenrick Centurion Window Locking Mechanism Gearbox 20mm Backset

Kenrick Centurion Espag Rod Gearbox 20mm BacksetInformationReplacement gearbox for Kenrick Centurion..

£5.99 Incl VAT

Details
Kenrick Sabrelock Window Locking Mechanism Gearbox

Kenrick Sabrelock Window Locking Mechanism Gearbox

Kenrick SabrelockKenrick Sabrelock Espag Rod Gearbox Information Replacement gearbox for Kenric..

£25.79 Incl VAT

Details
Kenrick Sentrilock Window Locking Mechanism Gearbox

Kenrick Sentrilock Window Locking Mechanism Gearbox

Kenrick Sentrilock Espag Rod GearboxInformationReplacement gearbox for Kenrick Sentrilock espag rods..

£13.49 Incl VAT

Details
Trojan Stallion Replacement Window Gearbox Lock

Trojan Stallion Replacement Window Gearbox Lock

Trojan Stallion Gearbox A replacement gearbox for the Trojan Stallion window lock mechanism. Th..

£14.99 Incl VAT

Details
uPVC Window Lock Kenrick Excalibur Espag Rod Gear Box Double Glazing Windows PVC

uPVC Window Lock Kenrick Excalibur Espag Rod Gear Box Double Glazing Windows PVC

Kenrick ExcaliburKenrick Excalibur Espag Rod Gearbox Information Replacement gearbox for ..

£8.99 Incl VAT

Details
Maco MK1 uPVC Window Lock Espag Gearbox Drive Gear Mechanism

Maco MK1 uPVC Window Lock Espag Gearbox Drive Gear Mechanism

Maco MK1 GearboxA genuine replacement Maco MK1 uPVC window espag gearbox. The Maco MK1 Gearbox is de..

£7.19 Incl VAT

Details
Maco MK2 uPVC Window Lock Espag Gearbox Drive Gear Mechanism 280mm

Maco MK2 uPVC Window Lock Espag Gearbox Drive Gear Mechanism 280mm

Maco GearboxA genuine replacement Maco MK2 uPVC window espag gearbox. The Maco Gearbox is desig..

£8.99 Incl VAT

Details
Maco MK2 uPVC Window Lock Espag Gearbox Drive Gear Mechanism 380mm

Maco MK2 uPVC Window Lock Espag Gearbox Drive Gear Mechanism 380mm

Maco MK2 Window LockA genuine replacement Maco MK2 uPVC window espag gearbox. This Maco Window Lock ..

£9.29 Incl VAT

Details
Maco Tilt and Turn Drive Gear Replacement Gearbox

Maco Tilt and Turn Drive Gear Replacement Gearbox

Maco Drive Gear Replacement GearboxThis part is designed to replace the broken gearbox on your Maco ..

£22.99 Incl VAT

Details
Roto Centro Tilt and Turn Drive Gear Replacement Gearbox

Roto Centro Tilt and Turn Drive Gear Replacement Gearbox

Roto Centro Drive Gear Replacement GearboxThis part is designed to replace the broken gearbox on you..

£22.99 Incl VAT

Details
Roto NT Tilt and Turn Drive Gear Replacement Gearbox

Roto NT Tilt and Turn Drive Gear Replacement Gearbox

Roto NT Drive Gear Replacement GearboxThis part is designed to replace the broken gearbox on your Ro..

£22.99 Incl VAT

Details
SI Siegenia Drive Gear Replacement Gearbox

SI Siegenia Drive Gear Replacement Gearbox

Siegenia Drive Gear Replacement GearboxThis part is designed to replace the broken gearbox on your S..

£22.99 Incl VAT

Details
Winkhaus Tilt and Turn Drive Gear Replacement Gearbox

Winkhaus Tilt and Turn Drive Gear Replacement Gearbox

Winkhaus Drive Gear Replacement GearboxThis part is designed to replace the broken gearbox on your W..

£22.99 Incl VAT

Details