Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > Alloy cutting

[desmojen]

Don't use a grinder Tonio, you can't see the sparks with aluminium and you will damage the heat treatment with the heat it produces.
If you don't take Dave G's very good advice then do the following,

Using a scriber, carefully mark out where you want to cut to.
Now use a hacksaw with a fresh blade to cut just outside the line, really close though. Use plenty of lubricant whilst doing this (WD40 or paraffin).
Once it's cut out, clean the lube off and mount it in a vice with some card packing or similar to prevent damage to the surface of the part, and then carefully file down to your scribe lines.
Use progressively finer files and finish off with wet'n'dry sandpaper to remove scratches from your cut lines.
Put a very slight chamfer on your edges and jobs done.
This will take absolutely ages but if you are careful you can create some very nice work