ECCN 2B992
ATNon-numerically controlled machine tools for generating optical quality surfaces, and specially designed parts and components therefor.
What This ECCN Covers
ECCN 2B992 covers non-"numerically controlled" machine tools for generating optical quality surfaces, as specified in the entry — the Anti-Terrorism companion for certain optical-finishing machines outside the higher controls. As an AT-only entry, it reaches a limited set of destinations.
Who needs to check this?
Makers and exporters of optical-grinding and polishing machines for lenses, mirrors, and precision optical components.
Compliance tip
Confirm the machine is non-numerically-controlled and generates optical-quality surfaces as described. AT-only control means a license is needed only to a limited destination list; screen all parties against the Entity and SDN lists.
Items Covered
- 1. Slide positioning accuracy less (better) than 0.0005 mm per 300 mm of travel;
- 2. Bidirectional slide positioning repeatability less (better) than 0.00025 mm per 300 mm of travel;
- 3. Spindle "run out" and "camming" less (better) than 0.0004 mm total indicator reading (TIR);
- 4. Angular deviation of the slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel; and
- 5. Slide perpendicularity less (better) than 0.001 mm per 300 mm of travel;
- b.Fly cutting machines having all of the following characteristics:
- 1. Spindle "run out" and "camming" less (better) than 0.0004 mm TIR; and
- 2. Angular deviation of slide movement (yaw, pitch and roll) less (better) than 2 seconds of arc, TIR, over full travel.
Control Reasons
Items controlled for anti-terrorism reasons. Most items on the CCL have AT controls.
Disclaimer
This information is for reference only. For official classifications, consult BIS or a qualified export control professional.