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GU Old Style Replacement Door Lock Gearbox Centre Case 35mm Reviews

4.6 Rating 65 Reviews
Read GB DIY Store Reviews

GU Old Style Gearbox 35mm
A replacement centre case gearbox for the GU old style multipoint door lock mechanism. If you're having problems with your door lock, the gearbox is almost always the problem and changing it to a GU Old Style Gearbox is as simple as removing a few screws.
GU Old Style Gearbox Information
Important Measurements: 35mm Backset / 92pz Centres
This is the mechanism inside the door that is operated by the handle.
Most likely to be the problem when a lock fails.
Reversible latch for left or right-handed doors
Fitting Advice
The gearbox is easily reattached to the locking strip via three-star head screws. 
Technical
A full technical diagram is included in the image gallery.

About GB DIY Store:

GB DIY Store is a family run, UK based company, which offers an extensive range of uPVC hardware which includes window handles and door handles, repair parts, tools and fitting supplies.

The team here has over 25 years experience in this industry, we have literally done it all. We started out manufacturing and installing windows and doors and slowly progressed in to repairs. Now, we offer a very extensive range of repair parts for windows and doors.

With our knowledge and wide range of repair parts, we can solve any problems you may have with your uPVC windows and doors. Whether its a repair, upgrade or just some good old fashioned advice, we've got it.

Our team is always happy to help, so please do not hesitate to contact us.

Visit Product Page

Phone:

01623622205

Email:

nathan@gbdiy.co.uk

Location:

Unit 1, Fox Covert Way,
Mansfield
Nottinghamshire
NG19 0FR

Perfect replacement and straightforward to install
Helpful Report
Posted 3 months ago
Still haven't received the second lock that I bought
Helpful Report
Posted 3 months ago
Duncan Neville
Verified Reviewer
excellent, exact match for the old unit
Helpful Report
Posted 4 months ago
MARGARET PAXTON
Verified Reviewer
we needed it for a replacement on a wooden door so should have ordered 45 instead of 35 for our door
Helpful Report
Posted 4 months ago
Mandi Russell
Verified Reviewer
Exactly what I needed, easy to order and fast delivery, highly recommended.
Helpful Report
Posted 4 months ago
John MacPherson
Verified Reviewer
Have an older house with very good plastic double-glazed patio doors but the lock had worn out and failed. Local locksmith assured me I was wasting my time trying to find a replacement part. But I persevered and found several, one here on GB DIY, which was also the cheapest. I orderd it, it came promptly & well-packaged. I fitted it in an hour (I have lock/door experience) and once 'fettled' it works perfectly. BIG plus point for GB DIY not penalising people like me in the north with ridiculous postage charges - Post Office universal delivery cost was used so I didn't get robbed. Absolutely recommend this lock and GB DIY!
Helpful Report
Posted 4 months ago
Mandi Russell
Verified Reviewer
Easy to find and order the product that I needed, and fast delivery, highly recommended.
Helpful Report
Posted 5 months ago
Author didn't leave any comments.
Helpful Report
Posted 5 months ago