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|  MIL-B-81793/28
Design. All bearings described by this specification sheet
1.
shall be angular contact instrument bearings with an unflanged,
separable and stepped inner ring configuration.
Material. The ball and ring material for these bearings
2.
shall be corrosion resistant steel 440C (UNS S44004) conforming
to QQ-S-763.
Tolerance class. The tolerance class shall be in accordance
3.
with the ABEC 7P 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 I.
Retainer. The retainer shall be as specified by the part
5.
number designator (PN DES) in Table II.
closures . Closures are not available for this type of
6.
bearing. Part number designator N shall be used as shown in
Table III.
-7.
Radial internal clearance or contact angle. Radial internal
clearance or contact angle shall be as specified by the part number
designator in Table IV.
Calibration. Calibration shall be as specified by the part
8.
number designator in Table V.
Performance Test. The performance test shall be as specified
9.
by the part number designator in Table VI.
Lubrication.
10.
10.1. Lubricant. The lubricant shall be in accordance with the
specification indicated 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 mating shall be applied to hearings
as specified by the part number designator in Table VII.
2
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