Document ID: chunk:federal_register_of_legislation:F2024L01024:front:0:p107
Version: federal_register_of_legislation:F2024L01024
Segment Type: other
Provision Reference: 
Character Range: 301537–304478

coordinated simultaneously for "contouring control";
b. Specially designed components for flow‑forming machines specified by 2B009 or 2B109.a.
Note: 2B109 does not apply to machines that are not usable in the production of propulsion components and equipment (e.g. motor cases and interstages) for systems specified by 9A005, 9A007.a. or 9A105.a.
Technical Note:
Machines combining the function of spin‑forming and flow‑forming are for the purpose of 2B109 regarded as flow‑forming machines.
2. B. 116. Vibration test systems, equipment and components therefor, as follows:
a. Vibration test systems employing feedback or closed loop techniques and incorporating a digital controller, capable of vibrating a system at an acceleration equal to or greater than 10 g rms between 20 Hz and 2 kHz while imparting forces equal to or greater than 50 kN, measured 'bare table';
2. B. 116. b. Digital controllers, combined with specially designed vibration test software, with a 'real‑time control bandwidth' greater than 5 kHz designed for use with vibration test systems specified by 2B116.a.;
Technical Note:
In 2B116.b., 'real‑time control bandwidth' means the maximum rate at which a controller can execute complete cycles of sampling, processing data and transmitting control signals.
c. Vibration thrusters (shaker units), with or without associated amplifiers, capable of imparting a force equal to or greater than 50 kN, measured 'bare table', and usable in vibration test systems specified by 2B116.a.;
d. Test piece support structures and electronic units designed to combine multiple shaker units in a system capable of providing an effective combined force equal to or greater than 50 kN, measured 'bare table', and usable in vibration systems specified by 2B116.a.
Technical Note:
In 2B116, 'bare table' means a flat table, or surface, with no fixture or fittings.
2. B. 117. Equipment and process controls, other than those specified by 2B004, 2B005.a., 2B104 or 2B105, designed or modified for densification and pyrolysis of structural composite rocket nozzles and re-entry vehicle nose tips.
2. B. 119. Balancing machines and related equipment, as follows:
N.B.: SEE ALSO 2B219.
a. Balancing machines having all the following characteristics:
1. Not capable of balancing rotors/assemblies having a mass greater than 3 kg;
2. Capable of balancing rotors/assemblies at speeds greater than 12,500 rpm;
3. Capable of correcting unbalance in two planes or more; and
4. Capable of balancing to a residual specific unbalance of 0.2 g mm per kg of rotor mass;
Note: 2B119.a. does not apply to balancing machines designed or modified for dental or other medical equipment.
b. Indicator heads designed or modified for use with machines specified by 2B119.a.
Technical Note:
Indicator heads are sometimes known as balancing instrumentation.
2. B. 120. Motion simulators or rate tables having all of the following characteristics:
a. Two axes or