Here is a new box for noise limitation and safety !
Build with 10 mm and 18 mm medium.
The machine stands on a plate of rubber like material designed for washing machine vibration isolation.
The blue tube is the connection to the external air compressor.

The mill in cooled and lubricated with a home-made microlub.

The oil/air mixer is based on a standard lubricating system. There is a by-pass if only air  flow is required. Currently running with 3.5 bars and a oil flow of 10 drops/min.

The nozzle is based on a Locline modified according to http://www.usinages.com/supports-lubrification-eclairage-entretien/realisation-artisanale-systemes-microlubrification-t9118-60.html

The nozzle hole is 1 mm diameter. With 3.5 bars, the air flow is around 30 liters/min.