3110-01-287-2970 BEARING,BALL,DUPLEX Index 3110-01-287-2972 BEARING,BALL,DUPLEX

National Stock Number:
3110-01-287-2971

Federal Supply Class:
3110

National Item Identification Number:
012872971

Description:
BEARING,BALL,DUPLEX

Detail:
Two single row annular ball bearings selected dimensionally to be a matched pair or set. The ring faces have been specially ground to specified offsets that will produce predetermined preload when mounted. May include a single row angular contact bearing with faces specially ground for duplex mounting.


Manufacturer Information:
717801718-00104939LOCKHEED MARTIN CORPORATION
H56140920MPB CORP


Techincal Specification:
MATERIALSTEEL COMP 440C BALL
STEEL COMP 440C INNER RING
STEEL COMP 440C OUTER RING
STEEL COMP 305 RETAINER
STEEL COMP 302 OR
STEEL COMP 301 SHIELD
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE BALL
QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE INNER RING
QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OUTER RING
AMS 5514,COND A ASSN STD SINGLE MATERIAL RESPONSE RETAINER
AMS 5516,COND A ASSN STD 1ST MATERIAL RESPONSE OR
AMS 5517 ASSN STD 2ND MATERIAL RESPONSE SHIELD
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE, TANDEM MOUNTING
OVERALL WIDTH0.2500 INCHES NOMINAL
BORE DIAMETER0.1875 INCHES NOMINAL
OVERALL OUTSIDE DIAMETER0.3750 INCHES NOMINAL
LUBRICATION MATERIALOIL
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONBRAYCO 815Z,CAGEC 04939 MFR REF SINGLE MATERIAL RESPONSE
STANDARD TOLERANCE DESIGNATIONABEC NO. 5P
SURFACE FINISHGROUND
RETAINER FABRICATION METHODPRESSED
SHIELD QUANTITY4
LOAD DIRECTIONRADIAL
BEARING PRELOAD RATING1.75 POUNDS MINIMUM AND
2.25 POUNDS MAXIMUM
SPECIAL FEATURESEACH BEARING LUBRICATED WITH ONE DROP FROM NO. 26 HYPODERMIC NEEDLE WITH SPECIFIED LUBE


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