Lampholders – Margin Services Help Centre https://help.marginservices.co.uk Fri, 17 May 2024 10:19:23 +0000 en-GB hourly 1 https://wordpress.org/?v=6.7.1 What does 10mm or 1/2″ entry mean? https://help.marginservices.co.uk/knowledge-base/what-does-10mm-or-1-2-entry-mean/ Fri, 17 May 2024 10:07:16 +0000 https://help.marginservices.co.uk/?post_type=epkb_post_type_1&p=553

There are 2 more common thread sizes in the world of lighting, 10mm and 1/2″ (12.7mm) approx. To find out what one you need is simple, there should be a thread that’s sticking out of your lamp fitting where the lampholder screws onto, you simply need to measure the outside diameter of that thread, After removing the lampholder.

10mm is generally used on modern lights and would be used if creating a new light fitting, whereas 1/2″ is found on older units such as floor standing and table lamps.

  • 10mm Pitch is 1mm (Fine Thread)
  • 1/2″ Pitch is 26 TPI (Turns per Inch)

If you cannot gain access to the male thread sticking out, and you only have the thread on the lampholder to measure, then the sizes will be as follows:

  • 10mm Thread – 8.8mm Approx.
  • 1/2″ Thread – 12mm Approx.

There are many other threads on the market depending on the origin of the lamp maker.

In Metric, there is:

  • 8mm
  • 13mm – (not to be confused with 1/2″ which is 12.7mm) They will kind of screw together, but due to pitches being different they will bind eventually.

And Imperial, there are a whole host of other size:

  • 5/8″
  • 5/16″
  • 3/8″
  • 1/4″ IP (American Thread)
  • 1/8″ IP (American Thread)

We have a range of reucders/enlargers hat cover the more common sizes mentioned above, view our range here

]]> Help With Replacement Lampholder on Metal Stem https://help.marginservices.co.uk/knowledge-base/help-with-replacement-lampholder-on-metal-stem/ Fri, 17 May 2024 10:00:08 +0000 https://help.marginservices.co.uk/?post_type=epkb_post_type_1&p=542

We often get asked to help with a replacement lampholder on a metal stem.

Before we can help with the replacement lampholder there is one piece of information we need and that is the thread diameter that the lampholder is fixed too.

Lampholders are designed to thread onto a male thread, the problem is sometimes manufacturers glue these into position, which can make disassembly a bit tricky.

Below is an example of the most standard scenario of a lampholder on a metal stem.

 

As you can see just below the lampholder is a nut, this is not always there, but you can leave it if you wish.

First step is to unwire the lampholder and remove the cable or leave it sticking out the top of the lampholder.

Take the bottom section of the lampholder and untwist it from the metal stem, as mentioned above this part could be glued into position so could be a bit tricky.

Using grips or pliers on the lampholder can help, or use a piece of rubber like a couple of elastic bands to help with grip.

Once the lampholder has been removed, you may need to clean the thread as it may have a piece of dried glue in the threads.

After the lampholder has been removed then you will need to measure the diameter of the thread as seen below this example is 10mm (1cm)

There are 2 common thread sizes 10mm and 1/2″ (12.7mm) this is important to know this size.

 

Here are a couple of links to our lampholders.

]]>