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Bearing, Ball, Annular, for Instruments and Precision Rotating Components
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Bearing, Ball, Annular, for Instruments and Precision Rotating Components
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Part Number



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MIL-B-81793/9
REQUIREMENTS
Design.  All bearings described by this specification sheet
1.
shall be deep groove instrument bearings with an unflanged, inner
ring extended configuration.
Material.  The ball and ring material for these bearings shall
2.
be chromium-alloy steel 52100 (UNS G52986) conforming to AMS 6444.
Tolerance class. The tolerance class shall be in accordance
3.
with the ABEC 5P tolerance tables of ANSI/AFBMA Standard 12.2. This
tolerance class shall apply to all bearing sizes listed in Table I
of this specification sheet.
4.  Boundary dimensions.  The boundary dimensions shall be as
specified by the dash number (DASH NO) in Table 1.
Retainer l  The retainer shall be as specified by the part
5.
number designator (PN DES) in Table II.
6. closures.  closures shall be as specified by the part number
designator in Table III.
Radial internal. clearance.  The radial internal clearance
7.
shall be as specified by the part number designator in Table IV.
Calibration.  Calibration shall be as specified by part
8.
number designator in Table V.
9.  Performance Test.  The performance test shall be as specified
by part number designator in Table VI.
10.
Lubrication.
10.1. Lubricant.  The lubricant shall be in accordance with the
specification specified by the part number designator in Table VII.
10.2 Lubricant amount.  The amount of lubricant shall be as
specified by the part number designator in Table VIII.
10.3. Barrier coating.  Barrier coating shall be applied to bearings
as specified by the part number designator in Table VII.
2

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