AIA NAS911

The machines covered by the specification are intended to perform all of the milling operations on wing skins, integral panels, complex forgings, extrusions, etc., of ferrous and/or non-ferrous materials for the Aerospace Industry.

Purpose

This specification provides a standard for the manufacture, performance, inspection and procurement of a series of numerically controlled, wide bed, vertical spindle, milling machines. These machines will have skin or profile milling capability or both. This standard lists minimum requirements and is not to limit design advances. This specification, as written, depicts a traveling gantry machine but does not preclude a traveling table machine.

Classification

These machines shall be of the following types, sizes, classes and number of axes.

Type

I. Two independent spindles

II. Two fixed spindles

III. Three fixed spindles

IV. Four fixed spindles

V. One Gantry

VI. Two Gantries

Note: Customer may specify two spindle carriers, each carrier having multiple spindles.

Size

I. Small, 96″ wide

II. Medium, 120″ wide

III. Large, 144″ wide

IV. Extra large, 168″ wide

Class

I. High speed spindle, non-ferrous

II. Wide range spindle ferrous and non-ferrous

Number of Axes

I. Three axes

II. Four axes

III. Five axes