3110-00-345-2241, BEARING,ROLLER,AIRFRAME

3120-00-345-2242 BEARING,PLAIN,SPHERICAL

National Stock Number:
3110-00-345-2241

Federal Supply Class:
3110

National Item Identification Number:
003452241

Description:
BEARING,ROLLER,AIRFRAME

Detail:
A CYLINDRICAL ITEM IN WHICH THE INNER OR OUTER RING TURNS UPON ROW(S) OF HARDENED ROLLER, BEARING WHICH ROLL ON A RACEWAY, THUS MINIMIZING FRICTION. THESE ITEMS ARE CHARACTERIZED BY THEIR NONCORROSIVE QUALITIES, LIGHTNESS OF WEIGHT, INCH DIMENSIONS RATHER THAN METRIC, INNER RINGS GENERALLY PROJECTING BEYOND THE FACES OF THE OUTER RING, OR A VERY NARROW WIDTH INNER RING HAVING AN OUTSIDE DIAMETER SLIGHTLY LARGER THAN THE BORE DIAMETER. DESIGNED PRIMARILY FOR USE IN AIRCRAFT ASSEMBLIES, SUCH AS CONTROL SYSTEMS AND SURFACES OF AIRCRAFT. EXCLUDES BEARING, ROLLER, CYLINDRICAL.

Manufacturer Information:

MS28914-12C

96906

MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M

Techincal Specification:

BEARING SEAL TYPE	CONTACT
BORE DIAMETER	0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM
INNER RING WIDTH	1.8700 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION	MIL-G-81322 MIL SPEC SINGLE MATERIAL RESPONSE
LUBRICATION MATERIAL	GREASE
OUTER RING WIDTH	1.2450 INCHES MINIMUM AND 1.2500 INCHES MAXIMUM
OVERALL OUTSIDE DIAMETER	2.6245 INCHES MINIMUM AND 2.6250 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR QQ-C-390 FED SPEC 2ND MATERIAL RESPONSE RETAINER
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE ROLLER
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE INNER RING
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-S-7420 MIL SPEC SINGLE MATERIAL RESPONSE OUTER RING
MATERIAL	RUBBER SYNTHETIC SEAL
MATERIAL	STEEL COMP 4140 OR COPPER ALLOY RETAINER
MATERIAL	STEEL COMP E52100 INNER RING
MATERIAL	STEEL COMP E52100 OUTER RING
MATERIAL	STEEL COMP E52100 ROLLER
RETAINER FABRICATION METHOD	MACHINED
SEAL QUANTITY	2
SPECIAL FEATURES	0.0002 IN. TO 0.0010 IN. RADIAL CLEARANCE,OIL HOLE AND OIL GROOVE IN OD OF OUTER RING,10 DEG SELF ALINGMENT IN EITHER DIRECTION,0.0007 IN. TO 0.0030 IN. AXIAL PLAY
STYLE DESIGNATOR	CONCAVE ROLLERS, DOUBLE CLOSURE, SELF ALIGNING
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	QQ-P-416,TY 1,CL 2 FED SPEC SINGLE TREATMENT RESPONSE ALL EXTERNAL/EXPOSED METAL SURFACES
SURFACE TREATMENT	CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES

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