Hi Guys,
Before I had the cylinder’s bored I turn up a mandrel (it was left in the chuck so running true at all times) to the exact size of the existing bore then mounted each cylinder on it using the tail stock with a pad to clamp the cylinder whilst machining, then faced the base (removing minimum amount to clean and match the cylinders). After this I also machined in an ‘O’ ring groove to help seal the base with out using a gasket.
The base is now true to the bore and can be used as a mounting face for boring.
Cheers Paul
Before I had the cylinder’s bored I turn up a mandrel (it was left in the chuck so running true at all times) to the exact size of the existing bore then mounted each cylinder on it using the tail stock with a pad to clamp the cylinder whilst machining, then faced the base (removing minimum amount to clean and match the cylinders). After this I also machined in an ‘O’ ring groove to help seal the base with out using a gasket.
The base is now true to the bore and can be used as a mounting face for boring.
Cheers Paul