Grinding small areas of laminate

[Durcott]

Hi Folks, two questions today - I've divided them up into two related issues ...

I want to grind away small areas of grp, limiting the amount of material removed, while getting rid of the waste quickly.

I've tried my little Dremel type tool, but it is getting through grinding bits quicker than the grp is being removed.

So - the context is getting to blind nuts that have been laminated into the deck which I need to fish out. (Don't get me started on why )
What would you use?

Kind regards

Jeff

 

[nigelmercier]

Dremel with a carbide cutter, like this.

 

[Durcott]

Hmmm - I had some of those with the 'Dremel' like tool. They lasted about 10 seconds, but I reckon there's no way they would be of a good quality.

OK - I'll see if I can get some better versions, like these ones - they do look the sort of thing I was after.

 

[captainboo]

Dremel with a carbide cutter, like this.

I've used these especially the straight and pointed tip one (http://www.dremeleurope.com/gb/en/o...s/tungsten-carbide-cutter-pointed-tip-3,2-mm/) on fibreglass/steel and even for enlarging holes in stainless steel and they are still sharp! Just make sure you get genuine ones and not aftermarket versions.

 

[gjgm]

Hi Folks, two questions today - I've divided them up into two related issues ...

I want to grind away small areas of grp, limiting the amount of material removed, while getting rid of the waste quickly.

I've tried my little Dremel type tool, but it is getting through grinding bits quicker than the grp is being removed.

So - the context is getting to blind nuts that have been laminated into the deck which I need to fish out. (Don't get me started on why )
What would you use?

Kind regards

Jeff

The black and decker file sander will sand through grp fast. Just be careful it isnt too fast.
The blind nuts? I'd go full assault and repair after. Have a read on West System on the internet.. grp is damn repairable !

 

[Topcat47]

I'd us a Fein like tool with a metal cutting blade so it won't get blunted too easily if you meet the nut.

I've had a lot of problems with my Dremel, which was a state-of-the-art one with a digital speed control. The Dremel carbide cutters are good (unlike the Lidl version) but they take an age.

I'd be tempted to have a go with a cutting disc in my angle grinder before going the Dremel route unless access is severely limited.

 

[Poignard]

I'd us a Fein like tool with a metal cutting blade so it won't get blunted too easily if you meet the nut.

Or one of these fein attachments might do the job

http://www.axminster.co.uk/fein-fein-multimaster-carbide-rasps-prod19588/

 

[fergie_mac66]

diamond discs

you can get diamond cutting/grinding discs about 1 1/2 inch dia dremmel type tools

http://www.toolspot.co.uk/product/6pc-diamond-cutting-disc-set

http://www.dremeleurope.com/gb/en/o.../dremel®-ez-speedclic™:-diamond-cutting-wheel.

http://www.amazon.co.uk/Diamond-cutting-disc-545-Dremel/dp/B0002SMN9G

Dont get cheap they dont last, the dearer typ last quit a while

 

[Chalker]

Use a small holesaw without the centre drill bit. The juddering stops quickly and then just cuts a rubg around the nut. Fairly fast speed and gentle pressure at first.
Works well on Westerly dek to hull joints that are glassed over.

 

[Boathook]

I have used a 'dremel' with dremel reinforced 'grinding' discs for cutting grp. Last a long time as far as wear goes but are easy to snap like any small disc. The other option is the round sanding tubes. Very good for remving crackd gel coat prior to refilling.

 

[oldsaltoz]

You do not need any power tools for this, just a small chisel and perhaps a small hammer, should take a minute or two to expose the offending nut.

Less mess as no clouds of dust.

Good luck and fair winds.

 

[Durcott]

Hi OldSaltOz

Errr - a chisel - really!!!! Do you literally mean a woodworking chisel? I would have assumed that is 'abuse' but if it works - then that is genius.

Do you find the chisels get blunted quickly, or do they work just fine?

It's the very last tool in the box I'd have tried, in which case - I've really learn't something

Cheers

Jeff

 

[Vara]

I keep an old cheap chisel which I sharpen with a file for exactly that sort of job, very useful... but nobody has ever accused me of craftsmanship.

 

[oldsaltoz]

Hi OldSaltOz

Errr - a chisel - really!!!! Do you literally mean a woodworking chisel? I would have assumed that is 'abuse' but if it works - then that is genius.

Do you find the chisels get blunted quickly, or do they work just fine?

It's the very last tool in the box I'd have tried, in which case - I've really learn't something

Cheers

Jeff

G'day Jeff,

For this application it's almost the perfect tool, look a chisel just a little wider than the flats on the nut, it will be fully exposed in no time if you work on one flat first then the the flat on the other side, go for about half the depth of the nut on the first trip round.

no dust, rapid progress.

Good luck and fair winds.

 

[Topcat47]

As long as you have enough room to swing the hammer.....

 

[30boat]

You do not need any power tools for this, just a small chisel and perhaps a small hammer, should take a minute or two to expose the offending nut.

Less mess as no clouds of dust.

Good luck and fair winds.

Another one for the chisel.That's what I always use with the added benefit that there's no dust.

 

[BERT T]

cutting and grinding GRP.

One of these will do your job very nicely.
Dremel Wall Tile Cutting Bit for Rotary Power Tools 562

 

[oldsaltoz]

As long as you have enough room to swing the hammer.....

That bit of pipe I spoke of ran all the way to the saloon.