2B201 Category 2B

Machine tools, and any combination thereof, other than those controlled by 2B001, for removing or cutting metals, ceramics or “composites,” which, according to manufacturer's technical specifications, can be equipped with electronic devices for simultaneous “contouring control” in two or more axes.

Category 2: Materials Processing

Reasons for control

• NP: Nuclear nonproliferation
• AT: Anti-terrorism

Country chart

List-based license exceptions

Items

1. a. Machine tools for turning, that have positioning accuracies according to ISO 230/2 (2006) with all compensations available better (less) than 4.5 µm along any linear axis (overall positioning) for machines capable of machining diameters greater than 35 mm;
2. b. Machine tools for milling, having any of the following characteristics:
3. b.1. Positioning accuracies according to ISO 230/2 (2006) with “all compensations available” equal to or less (better) than 4.5 µm along any linear axis (overall positioning);
4. b.2. Two or more contouring rotary axes; or
5. b.3. Five or more axes which can be coordinated simultaneously for “contouring control.”
6. c. Machine tools for grinding, having any of the following characteristics:
7. c.1. Positioning accuracies according to ISO 230/2 (2006) with “all compensations available” equal to or less (better) than 3 µm along any linear axis (overall positioning);
8. c.2. Two or more contouring rotary axes; or
9. c.3. Five or more axes which can be coordinated simultaneously for “contouring control.”

Related controls

(1) See ECCNs 2D002 and 2D202 for “software” for items controlled by this entry. “Numerical control” units are controlled by their associated “software”. (2) See ECCNs 2E001 (“development”), 2E002 (“production”), and 2E201 (“use”) for technology for items controlled under this entry. (3) Also see ECCNs 2B001 and 2B991.

Notes

Note: 2B201 does not control special purpose machine tools limited to the manufacture of any of the following parts: a. Gears; b. Crank shafts or cam shafts; c. Tools or cutters; d. Extruder worms;

Technical Note: The identified positioning accuracy values in this entry are based on ISO 230/2 (2006), which equates to the values based on ISO 230/2 (1988) that are used by the Nuclear Supplier's Group (NSG). In 2B201.a and .b.1, this results in a change from 6 µm to 4.5 µm. In paragraph .b of the Note to 2B201.b, the resulting change is from 30 µm to 22.5 µm, In 2B201.c, the resulting change is from 4 µm to 3 µm.

Note to 2B201.a: 2B201.a does not control 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 and/or milling capabilities for machining parts with diameters less than 42 mm.

Note to 2B201.b: 2B201.b does not control milling machines having the following characteristics: a. X-axis travel greater than 2 m; and b. Overall positioning accuracy according to ISO 230/2 (2006) on the x-axis more (worse) than 22.5 µm.

Note to 2B201.c: 2B201.c does not control 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 3 microns. Positioning accuracy is according to ISO 230/2 (2006).

Technical Note: 2B201.b.3 and c.3 include machines based on a parallel linear kinematic design (e.g. hexapods) that have 5 or more axes none of which are rotary axes.

Source: eCFR, version 2026-08-01, retrieved 2026-08-20T04:04:59+00:00.