ECCN
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2B992
2B992 Non-“numerically controlled” machine tools for generating optical quality surfaces, (see List of Items Controlled) and “specially designed” “parts” and “components” therefor.
- Category
- Category 2—Materials Processing
- Product group
- B. “Test”, “Inspection” and “Production Equipment”
Reason for Control
- AT
Official text
License Requirements
Reason for Control:
AT
Control(s) Country Chart (See Supp. No. 1 to part 738) AT applies to entire entry AT Column 1
List Based License Exceptions (See Part 740 for a description of all license exceptions)
LVS: N/A
GBS: N/A
List of Items Controlled
Related Controls: N/A
Related Definitions: N/A
Items: a. Turning machines using a single point cutting tool and having all of the following characteristics:
a.1. Slide positioning accuracy less (better) than 0.0005 mm per 300 mm of travel;
a.2. Bidirectional slide positioning repeatability less (better) than 0.00025 mm per 300 mm of travel;
a.3. Spindle “run out” and “camming” less (better) than 0.0004 mm total indicator reading (TIR);
a.4. Angular deviation of the slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel; and
a.5. Slide perpendicularity less (better) than 0.001 mm per 300 mm of travel;
Technical Note:
The bidirectional slide positioning repeatability (R) of an axis is the maximum value of the repeatability of positioning at any position along or around the axis determined using the procedure and under the conditions specified in part 2.11 of ISO 230/2: 1988.
b. Fly cutting machines having all of the following characteristics:
b.1. Spindle “run out” and “camming” less (better) than 0.0004 mm TIR; and
b.2. Angular deviation of slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel.
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
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