2B228 Category 2B
Rotor fabrication and assembly equipment, rotor straightening equipment, bellows-forming mandrels and dies, as follows (see List of Items Controlled).
Category 2: Materials Processing
Reasons for control
- NP: Nuclear nonproliferation
- AT: Anti-terrorism
Country chart
List-based license exceptions
Items
- a. Rotor assembly equipment for assembly of gas centrifuge rotor tube sections, baffles, and end-caps;
- b. Rotor straightening equipment for alignment of gas centrifuge rotor tube sections to a common axis;
- c. Bellows-forming mandrels and dies for producing single-convolution bellows.
Related controls
See ECCNs 2E001 (“development”), 2E002 (“production”), and 2E201 (“use”) for technology for items controlled under this entry.
Notes
Note: 2B228.a includes precision mandrels, clamps, and shrink fit machines.
Technical Note: The rotor straightening equipment in 2B228.b normally consists of precision measuring probes linked to a computer that subsequently controls the action of, for example, pneumatic rams used for aligning the rotor tube sections.
Technical Note: In 2B228.c, the bellows have all of the following characteristics: 1. Inside diameter between 75 mm and 650 mm; 2. Length equal to or greater than 12.7 mm; 3. Single convolution depth greater than 2 mm; and 4. Made of high-strength aluminum alloys, maraging steel or high strength “fibrous or filamentary materials”.
Source: eCFR, version
2026-08-01, retrieved
2026-08-20T04:04:59+00:00.