Ceramic basin tap hole needs enlarging

[teddyman5]

I am going to fit a monobloc mixer to one hole in the basin to replace the two existing taps. Online supplier told me the new tap would fit a standard hole, however my holes look to be 30mm and I estimate I need it to be 40mm. I can't return the tap so I need any advice on how to safely enlarge the hole?

Thanks in advance.

 

[denso13]

No chance of making bigger holes in a ceramic basin. sorry.

 

[teddyman5]

What about a file? Is there a rotary one that's suitable perhaps?

 

[denso13]

There are hole cutters which will do it but probably cheaper buying a new tap, or basin. The basin might not be up to it so you might end up buying a specialist hole cutter and a new basin

 

[muggles]

Pffft slim to no chance of that working, you could possibly do it with a diamond core drill, but I'd give you a 50:50 chance of slipping and damaging the basin in the process