Measuring the spindle length on a window handle is a straightforward process. The spindle length is the distance from end to end of the spindle that slots into the locking mechanism.
To accurately measure the spindle length of your window handle, follow these simple steps:
- Remove the Window Handle: If the handle is attached, you'll typically need to unscrew it from the window frame or sash to expose the full length of the spindle. There are usually two screws holding the handle in place.
- Identify the Spindle: The spindle is the square or sometimes rectangular metal bar that protrudes from the handle base. It's the part that inserts into the window's gearbox or locking mechanism, allowing you to operate the lock.
- Measure the Length: Using a tape measure or a ruler, measure the length of the spindle from one end to the other. Ensure you measure the entire length of the spindle, including the part that was inserted into the window mechanism and the part that was within the handle base (if measuring a detached spindle).
- Note the Measurement: Record the measurement in millimeters (mm), as this is the standard unit used for spindle lengths in window hardware. Common spindle lengths include 10mm, 15mm, 30mm, 40mm, 43mm, and more, though custom sizes exist.
Here's a quick summary:
| Measurement Point | Description |
|---|---|
| Start | End of the spindle |
| End | Opposite end of the spindle |
| Measurement | Total distance between these two ends |
Why is Spindle Length Important?
The spindle length is a critical measurement when replacing a window handle. An incorrect spindle length means the handle will not engage properly with the window's locking mechanism, rendering it inoperable.
- Too Short: The spindle won't reach or fully engage the gearbox.
- Too Long: The handle might not sit flush against the window frame, or the spindle might bottom out in the gearbox, preventing smooth operation.
Other Key Window Handle Measurements
While spindle length is vital, you may also need other measurements when choosing a replacement handle. These often include:
- Fixing Centres: The distance between the screw holes that attach the handle base to the window frame. This is usually measured from the centre of one screw hole to the centre of the other. Standard UPVC window handle fixing centres are often 43mm.
- Backplate Width: The width of the handle base that sits against the window frame.
- Backplate Height: The height of the handle base.
Understanding these measurements helps ensure a perfect fit for your new window handle. Once you have these measurements, you can easily find a compatible replacement.
