Technical Help - Text your pictures to 07866 068177 & then call us
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 thumbturn cylinder
How to identify the hand:
of a door handle
of a window handle
Changing the hand of a split spindle
How to measure a door lock:
| 1 |
Backset |
| 2 |
PZ |
| 3 |
Outer mechanism to outer mechanism |
| 4 |
Overall length |
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 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 the PZ of a door handle:
This is the measurement from the centre of the cylinder to the centre of the spindle.
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:
| 1 |
Overall Length |
| 2 |
Width |
| 3 |
Backset – front of faceplate to centre of spindle |
| 4 |
Inline or Offset – Inline is when the gearbox is in the centre of the rail. Offset is when the gearbox is set to one side of the rail. |
Alternatively, you could buy our 'Espag in a Bag' retrofit espag rod, which replaces inline & offset espag rods, ranging from 400mm – 1000mm & is available in a 21mm & 25mm backset.
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: -
Changing the hand of a split spindle
