Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p109
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 306770–309645

linear axis (overall positioning) for machines capable of machining diameters greater than 35 mm;
Note: 2B201.a. does not apply to bar machines (Swissturn), limited to machining only bar feed thru, if maximum bar diameter is equal to or less than 42 mm and there is no capability of mounting chucks. Machines may have drilling or milling capabilities for machining parts with diameters less than 42 mm.
2. B. 201. b. Machine tools for milling, having any of the following characteristics:
2. B. 201. b. 1. Positioning accuracies with "all compensations available" equal to or less (better) than 6 µm according to ISO 230/2:2014 or national equivalents along any linear axis; or
2. B. 201. b. 2. Two or more contouring rotary axes;
Note: 2B201.b. does not apply to milling machines having the following characteristics:
                   a. X‑axis travel greater than 2 m; and
                   b. Overall positioning accuracy on the x‑axis more (worse) than 30 µm.
2. B. 201. c. Machine tools for grinding, having any of the following characteristics:
1. Positioning accuracies with "all compensations available" equal to or less (better) than 4 µm according to ISO 230/2:2014 or national equivalents along any linear axis; or
2. Two or more contouring rotary axes.
Note: 2B201.c. does not apply to the following grinding machines:
                   a. Cylindrical external, internal, and external‑internal grinding machines having all of the following characteristics:
                       1. Limited to a maximum workpiece capacity of 150 mm outside diameter or length; and
                       2. Axes limited to x, z and c;
                   b. Jig grinders that do not have a z‑axis or a w‑axis with an overall "positioning accuracy" less (better) than 4 µm according to ISO 230/2:2014 or national equivalents.
Note 1: 2B201 does not apply to special purpose machine tools limited to the manufacture of any of the following parts:
a. Gears;
b. Crankshafts or camshafts;
c. Tools or cutters;
d. Extruder worms.
Note 2: A machine tool having at least two of the three turning, milling or grinding capabilities (e.g., a turning machine with milling capability), must be evaluated against each applicable entry 2B001.a. or 2B201.a., b or c.
2. B. 204. "Isostatic presses", other than those specified by 2B004 or 2B104, and related equipment, as follows:
a. "Isostatic presses" having both of the following characteristics:
1. Capable of achieving a maximum working pressure of 69 MPa or greater; and
2. A chamber cavity with an inside diameter in excess of 152 mm;
b. Dies, moulds and controls, specially designed for "isostatic presses" specified by 2B204.a.
Technical Note:
In 2B204 the inside chamber dimension is that of the chamber in which both the working temperature and the working pressure are achieved and does not include fixtures. That dimension will be