Bloody hell

[oakleyb]

Just found that my 2 new Blakes seacocks require differently sized holes by about1.5 mm, not an easy size to increase. Any ideas on how this is best achieved or should i get someone to do it for me bearing in mind i would need to buy the drill bits etc. Boat currently ashore near Port Solent so any knowledge of good engineers capable of doing this please let me know

ta

 

[BACUS]

Look at a cone cutter

 

[sailorman]

1/2 round course file

 

[Poignard]

http://www.mscdirect.co.uk/BBL-00120J/SEARCH:KEYWORD/product.html

Various sizes available.

You'd need a dust mask as well!

But, as Bacus suggest, a cone cutter would be good if you can get one the right size.

 

[savageseadog]

stick a piece of ply or other wood over the hole using Sikaflex, Evo stick or whatever, drill a pilot hole centred in the existing hole through the wood /ply you've stuck on. Use a hole saw of the correct size for the new fitting centred using the previously drilled pilot hole.

 

[prv]

For less than 2mm difference in diameter, I'd go with the file. The sikaflex will easily take up any slight non-circularity.

Pete

 

[macd]

For less than 2mm difference in diameter, I'd go with the file.

...or a Dremel if you have one. 1.5mm is nowt.

 

[vyv_cox]

Not wishing to start a huge thread where everyone names their favourite tool, but for that job I would use a flap sander. I agree that a file or Dremel will do it but the larger diameter of the flap sander makes it easier to maintain roundness.

 

[Davegriff]

Not wishing to start a huge thread where everyone names their favourite tool, but for that job I would use a flap sander. I agree that a file or Dremel will do it but the larger diameter of the flap sander makes it easier to maintain roundness.

+1

 

[sailorman]

Thnx i had never thought of that but then again i only bought one 2 yrs ago.

Not wishing to start a huge thread where everyone names their favourite tool, but for that job I would use a flap sander. I agree that a file or Dremel will do it but the larger diameter of the flap sander makes it easier to maintain roundness.

 

[Kilter]

Not wishing to start a huge thread where everyone names their favourite tool, but for that job I would use a flap sander. I agree that a file or Dremel will do it but the larger diameter of the flap sander makes it easier to maintain roundness.

That would be my weapon of choice too