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Requirements
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Bearing, Ball, Annular, for Instruments and Precision Rotating Components
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Table I. Boundary Dimensions (Inches)



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MIL-B-81793/25
Part number.  The part number consists of the following:
11.
prefix letter M; general specification number; number of this
specification sheet; dash number; and characters for retainer,
closures, radial internal clearance or contact angle, calibration,
performance test, lubricant, and lubricant amount.
Lubricant amount
Lubricant
Performance test
Calibration
Radial internal clearance
closures
Retainer
Dash number
Specification sheet number
M81793/25-BA7N4N2F1 indicates - Bore 0.0469"; outside diameter
0.1562"; width 0.0625"; radius
0.003"; retainer, phenolic laminate;
closures , none; contact angle,
greater than 14 but less than 20;
no calibration; performance test,
starting torque - Grade A;
lubricant, MIL-L-81322; lubricant
amount, manufacturer's standard.
3

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