25mm Knockout Metal Clad Boxes.

[RDB85]

I’m looking for some metal clad sockets. But I need 25mm knockouts. Does anyone know any surface mounted metal clad sockets that have them? MK do some nice ones but they are only 20mm knockouts.

 

[davesparks]

Sorry

I should have said in a domestic application

Ah right, in that case steel conduit is pretty rare full stop.
I've only used it in domestic a couple of times and they were in rather well equipped shed/workshop buildings and a stable block in a garden.

 

[ipf]

Ah right, in that case steel conduit is pretty rare full stop.
I've only used it in domestic a couple of times and they were in rather well equipped shed/workshop buildings and a stable block in a garden.

Very rare. A couple of boiler houses in very large premises....with 3 phase supplies, for me.
Although, I have a couple of foot of it in my garage...…...intruders in mind.

 

[GBDamo]

Your wholesaler will likely have step drills on the shelf

The best one ive used was a Rexel (£70-80 if memory serves me) own brand, they're great for stepping up existing holes in metal or new holes on plastic but they do suffer from losing their edge if you try to start a fresh hole in metals.

 

[Bellendian]

Trouble is all these cone/step drills will make the hole bigger concentrically, and that won't work if you're trying to enlarge the 20mm knockout on a metalclad socket.

 

[rsgaz]

A sheet metal punch will do an offset centred hole. Just make sure all three pointy bits are biting into metal and you haven't aligned one of the points inside the existing hole.

 

[David Prosser]

You could try drilling a pilot hole then using a sheet metal punch if there a spot without a knock out that's convenient.

rsgaz beet me to it

 

[RDB85]

Do you mean something like: Q.Max Sheet Metal Punch - 25mm QMA25M: Amazon.co.uk: DIY & Tools - https://www.amazon.co.uk/Q-Max-Sheet-Metal-Punch-QMA25M/dp/B0055KJHLS/ref=pd_lpo_sbs_60_t_0?_encoding=UTF8&psc=1&refRID=YAHYKY81R3YJJ2MEYVPE

 

[rsgaz]

Yes, they let you enlarge a hole like this...

 

[RDB85]

Yes, they let you enlarge a hole like this...

Thanks, I might order one, as they look like they could do the job quite easily, not much mess either.

 

[Pete999]

I’m looking for some metal clad sockets. But I need 25mm knockouts. Does anyone know any surface mounted metal clad sockets that have them? MK do some nice ones but they are only 20mm knockouts.

You could enlarge the 20mm with a cone cutter, might work for you

 

[Silly Sausage]

You could enlarge the 20mm with a cone cutter

Yo, he's back!

 

[Dustydazzler]

You could enlarge the 20mm with a cone cutter

Welcome back

 

[Pete999]

Welcome back

Thanks D2

 

[Spoon]

You could enlarge the 20mm with a cone cutter, might work for you

I missed you...

 

[Pete999]

I missed you...

Not been back 5seconds and you're trying it on again lol