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Technical Help

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How to measure a door lock

How to identify a door lock

How to measure the backset:
of a door lock
of a cockspur handle

How to measure the PZ:
of a door lock
of a door handle

How to measure a cylinder

How to measure a thumbturn cylinder

How to measure a drive gear

How to measure an espag rod

How to identify the hand:
of a door handle
of a window handle

Measurements Of Friction Stays & Window Types

Hinges Types & Upstand

Measurements required for Sash Balances


How to measure a door lock:





How to identify a door lock:

What make is the lock? Is there a logo on it?

Is there a code or any markings on the strip?

What mechanisms are on the lock:

How to identify a door lock

How many of each mechanism are there?

Email a picture of the lock, showing any mechanisms and/or logos to info@northwesthardware.co.uk


How to measure the backset of a door lock:

This is the measurement from the faceplate to the centre of the spindle.


How to measure the backset of a cockspur handle:

To determine the backset of a cockspur handle, you need to measure from your window frame, to the underside of the arm.


How to measure the PZ of a door lock:

This is the measurement from the centre of the cylinder to the centre of the spindle.


How to measure a door handle:

These are the various measurements that you can find on a door handle.




How to measure a cylinder:

Measurement from one side to the centre, and then from the other side to the centre, e.g. 30/40.


How to measure a thumbturn cylinder:

Always give the measurement of the thumbturn side first. Measurement from the thumbturn side to the centre, and then from the other side to the centre, e.g. 40/40.


How to measure a drive gear:

Internal Only

As well as the measurements below, please take note of any names and markings on the strip, and whether it has any rollers or mushrooms.

1
Overall Length
2
Width
3
front of faceplate to centre of spindle

Internal / External

As well as the measurements below, please take note of any names and markings on the strip, and whether it has any rollers or mushrooms.

1
Overall length
2
Width
3
Backset - front of faceplate to centre of spindle
4
PZ - he measurement from the centre of the cylinder to the centre of the spindle


How to measure an espag rod:



How to identify the hand of a door handle:

The hand of a door handle is determined by the direction in which the handle points.

This is a right handed door handle: -


How to identify the hand of a window handle:

The hand of a window handle is determined by the direction in which the handle points when turned.

This is a left handed window handle: -


Measurements of Friction Stays & Window Types




Hinges Types & Upstand



Sash Balances