Increasing aperture size in fixed worktop.

[Tristar]

I am replacing an inset hob with a slightly larger one. Any advice on using a router to increase the length of the aperture. It is not possible to get a standard jig in position or to remove the worktop without damaging it.

 

[johnny2007]

Use a spirit level or 2 stuck with double sided carpet tape.
Then carefully, a layer at the time route the hole.

 

[Tristar]

Thanks, I had in mind something like that. I am only a DIYer with a 1/4” router, any bit recommendations?

 

[johnny2007]

Thanks, I had in mind something like that. I am only a DIYer with a 1/4” router, any bit recommendations?

Standard straight bit.
A 12mm will be quicker, but in reality you're gonna take it easy, so no difference.
Just don't use a very small one.

 

[foxhole]

Jigsaw would also do it .

 

[EddieM]

1/4" router may struggle.

 

[johnny2007]

Jigsaw would also do it .

Unless there's less than 75mm from wall, but then the last bit cod be done by hand.
Router gives a cleaner cut.

 

[johnny2007]

1/4" router may struggle.

Not if it's done in 3or 4 mm stages.
In fact, i would go 2mm for the first pass as the laminate worktop is harder, then 4 or 5mm for the rest which is usually chipboard.

 

[Tristar]

Yes, I intended to do it in very small cuts 2 or 3 mil per pass, 15mm off each end. I am particularly concerned at getting the corners right, have been advised to use a straight flute.

 

[HERTS P&D]

Multi tool!

Andy

 

[Tristar]

Cancel all that. The hob has just arrived and has chamfered edges! So will not be recessed. I will have to build the front and rear steps up to support the front and rear edges of the hob.