Page 128 - ELT_15th July 2020_Vol 373_Part 2

E38 EXCISE LAW TIMES [ Vol. 373

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a. Ball bearings and solid and having both ‘rings’
roller bearings, having and ‘rolling elements’,
all tolerances specified made from monel or be-
by the manufacturer in ryllium;
accordance with ISO Note : 8A201.a does not
492 Tolerance Class 4 , apply to tapered roller
or better, and having bearings.
both ‘rings’ and ‘rolling Technical Notes
elements’ (ISO 5593), 1. ‘Ring’ - annular part
made from monel or be- of a radial rolling
ryllium; bearing incorporat-
Note 8A201.a does not ing one or more
apply to tapered roller raceways (ISO
bearings. 5593:1997).
Technical Notes 2. ‘Rolling element’-
1. ‘Ring’ - annular ball or roller which
part of a radial rolls between race-
rolling bearing ways (ISO
incorporating one 5593:1997).
or more raceways b. (Reserved)
(ISO 5593:1997). c. Active magnetic bearing
2. ‘Rolling element’- systems using any of the
ball or roller following, and specially
which rolls be- designed components
tween raceways therefor :
(ISO 5593:1997). 1. Materials with flux
b. (Reserved) densities of 2.0 T
c. Active magnetic bear- or greater and
ing systems using yield strengths
any of the following : greater than 414
1. Materials with MPa;
flux densities of 2. All-
2.0 T or greater electromagnetic 3D
and yield homopolar bias
strengths great- designs for actua-
er than 414 tors; or
MPa; 3. High temperature
2. All- (450 K (177°C) and
electromagnetic above) position
3D homopolar sensors.
bias designs for
actuators; or
3. High tempera-
ture (450 K
(177°C) and
above) position
sensors.
25. Change in 8A201.c Active magnetic bear- 8A201.c Active magnetic bearing
entry at ing systems using any of the systems using any of the following,
8A201.c. following : and specially designed compo-
nents therefor :
EXCISE LAW TIMES  15th July 2020  128