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How To Identify Your Window Lock

How To Identify Your Window Lock

How do I know which Espag Lock to choose?

 

Lets look at the things that matter; 

 

A - Rail length - this is the total length of the rod from end to end.

B - The distance between screw hole centres. 43mm is the industry standard for almost all Espagnolette rods.

C - Cam Height - this is the height of the projecting locking part on the rod. Today this is often called a mushroom cam due to its shape. Mushroom cams can be used to replace roller cams without problem.

D - The backset - this is the horizontal distance from the face of the lock to the centre line of the handle screw fixing holes.

E -  Rail width - this is the width of the rod from side to side and almost always 16mm.


Please look at the pictures below to help determine where these parts are to get the correct measurements:

Inline Espagnolette for Upvc Windows

All espagnolette multipoint locks are interchangeable regardless of make but it is essential that the measurements outlined above are correct. If a different make is substituted it is possible that the existing keeps will need to be adjusted to accommodate a slight difference in position of the new cams.


Mushroom cams or rollers?

 

Mushroom Cams are standard on all our Espag locks, these can be used to replace roller cams without problem. 

window Espag mushroom cams

 

Offset or Inline?


Now you must determine if you require an 'inline' or 'offset' lock. Again use the picture below to help. An inline lock holds the gearbox in the centre of the rail whereas the offset lock is set to one side. These are listed separately on our categories page.

Offset and Inline Espags

Rail Width

 

Rail width - this is the width of the rod from side to side and almost always 16mm, but please check as you may need a slim 14mm rail offset Espag.


Offset and Inline Espags rail width

 

The new locks will have adjustable mushroom cams that can be moved using an Allen key. If the handle is loose and slips into the closed position too easily you may need to increase compression by adjusting the cams and likewise if the handle is difficult to close compression may need to be decreased.

We advise regular care of your locks with the use of a maintenance spray to prolong life and maintain smooth action.