Abrasive "sticks" needed...

[vx220]

Literally no idea where to put this, so I'll leave it here and trust in the mods to direct towards people who know...

I need a tapered abrasive stick, kind of like a fully round file, but with emery/wet and dry/sandpaper instead?

The idea is I have some holes to enlarge in some plastic parts, and the hole will need to be a fairly tight push fit on the new part that will be going in (a tweeter)

Normally I'd get a holesaw of the right size, but as there is a hole already there, I have no centre to line up to. What I have done previously is to enlarge the holes using a round, tapered whetstone, a little at a time until the holes were the right size, but I need to go almost up to 2" diameter, so the whetstone I have is too small

A file won't work, as it cuts in the fore-aft plane. It needs to be tapered along its length so I can push it in from behind, give it a twist and then check the fit.

Any ideas gratefully received! Thank you

[vx220]

Either of them would definitely do, just it's quite soft plastic, so I don't want anything too aggressive for my clumsy oafish hands to go too far!

Got me wondering about dremel bits, I could use it by hand?

[vx220]

steveo3002 said:

fashion a stick to what you need then glue on some wet n dry

It may come to this! Thanks for all replies

[vx220]

saaby93 said:

Do we need a forum for tools?

Mate, that's a bit harsh! I'm not a... oh, I see what you mean

[vx220]

Funnily enough, when I use to cut out the searches for my RC cars I used wet and dry wrapped around something to smooth them out, so I may just be able to wrap the wet and dry around the tapered whetstone I already have.

Thanks for all the ideas, anymore gratefully received

[vx220]

woodypup59 said:

Clamp the job to a piece of plywood and use an ordinary hole saw (the pilot drill goes in the wood).

It's an angled truncated cone, if it was flat I could have done this.

Thanks for all the suggestions, great to have so much help

[vx220]

Simpo Two said:

You need a reamer:

Used to use these in RC as well, and to do a similar thing, start small and enlarge until exact. I wonder if I can get one of large enough diameter?

[vx220]

vx220 said:

steveo3002 said:

fashion a stick to what you need then glue on some wet n dry

It may come to this! Thanks for all replies

Small update. I found a suitably sized and tapered adaptor for a vacuum cleaner, wrapped various grades of sandpaper around it and it worked brilliantly! Did the first side in an hour or so...

Then today, queuing in the chemists, I find a round, tapered abrasive block for taking dead skin off ladies feet! So the second one will be easier, I think...