anx_III__table__128

X.A.X.003 | Bearings and bearing systems not controlled by 2A001 (see List of Items Controlled): a. Ball bearings or Solid ball bearings, having tolerances specified by the manufacturer in accordance with ABEC 7, ABEC 7P, or ABEC 7T or ISO Standard Class 4 or better (or equivalents) and having any of the following characteristics; 1. Manufactured for use at operating temperatures above 573 K (300 oC) either by using special materials or by special heat treatment; or 2. With lubricating elements or component modifications that, according to the manufacturer's specifications, are specially designed to enable the bearings to operate at speeds exceeding 2,3 million “DN”; b. Solid tapered roller bearings, having tolerances specified by the manufacturer in accordance with ANSI/AFBMA Class 00 (inch) or Class A (metric) or better (or equivalents) and having either of the following characteristics: 1. With lubricating elements or component modifications that, according to the manufacturer's specifications, are specially designed to enable the bearings to operate at speeds exceeding 2,3 million “DN”; or 2. Manufactured for use at operating temperatures below 219 K (-54 oC) or above 423 K (150 oC); c. Gas-lubricated foil bearing manufactured for use at operating temperatures of 561 K (288 oC) or higher and a unit load capacity exceeding 1 MPa; d. Active magnetic bearing systems; e. Fabric-lined self-aligning or fabric-lined journal sliding bearings manufactured for use at operating temperatures below 219 K (-54 oC) or above 423 K (150 oC). Technical Notes: 1. “DN” is the product of the bearing bore diameter in mm and the bearing rotational velocity in rpm. 2. Operating temperatures include those temperatures obtained when a gas turbine engine has stopped after operation.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-15 · Text as adopted (Official Journal); later amendments are not incorporated in this text.