Ninety degree auto changer spindle mounting assembly

A machining system comprising:

• a spindle;
• a Computer Numerical Control (CNC) machine;
• an auto changer device;
• a gas supply line;
• and
• a mounting assembly including:
• an insertable top portion for inserting into a mounting collar and to be rotatable therein, the insertable top portion formed with an upper disk shape with a first diameter, and the insertable top portion also formed with a lower disk shape with a second diameter, the lower disk shape being adjacent to the upper disk shape, an outer circumference of the upper disk shape having a groove formed therein, and the upper disk shape and the lower disk shape having a passage axially formed therethrough along a longitudinal axis of the insertable top portion;
• and
• a sleeve with an inner sidewall and an outer sidewall, the sleeve being disposed below the insertable top portion, the sleeve defining an opening surrounded by the inner sidewall, which opening has a longitudinal center axis that is perpendicular to the longitudinal axis of the insertable top portion, the opening sized to hold the spindle, the sleeve further defining a port formed in the inner sidewall of the sleeve, the port providing fluid communications with the passage of the insertable top portion, the sleeve further comprising an edge formed next to the opening, the edge defining an arcuate-shaped channel that is concentric with the opening and that extends from the edge by a given depth, an inner sidewall slot formed in the inner sidewall, the arcuate-shaped channel extending from the edge into an interior portion of the sleeve between the inner sidewall and the outer sidewall, and the inner sidewall slot is in fluid communications with the arcuate-shaped channel to allow exhaust air from the spindle to pass from the inner sidewall slot through the arcuate-shaped channel.