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PartsTable / COMPONENT / RF4012X48A512-20
RF4012X48A512-20 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C INNER RING, bore_shape: STRAIGHT, bore_diameter: 0.1250 INCHES NOMINAL IN, overall_width: 0.1562 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-403-7591, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
RF4012X48A512-20
NSN: 3110-00-403-7591
FSC: 3110
CAGE: 59750 — RMB MINIATURE BEARINGS INC (USA)
SPECIFICATIONS
materialSTEEL COMP 440C INNER RING
bore_shapeSTRAIGHT
bore_diameter0.1250 INCHES NOMINAL IN
overall_width0.1562 INCHES NOMINAL IN
seal_quantity2
load_directionRADIAL
surface_finishGROUND
shield_quantity2
special_featuresAMOUNT OF LUBRICANT 20 MG PORM 20 PER CENT
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeCONTACT
internal_clearance0.0005 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
NSN3110-00-403-7591
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: RF4012X48A512-20 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
LUBRICATION MATERIAL: OIL
•
RETAINER FABRICATION METHOD: PRESSED
•
INTERNAL CLEARANCE: 0.0005 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
•
BORE SHAPE: STRAIGHT
•
LOAD DIRECTION: RADIAL
•
SURFACE FINISH: GROUND
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: DC200,FSCM 71984 MFR REF SINGLE MATERIAL RESPONSE
•
SHIELD QUANTITY: 2
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIALOIL
RETAINER FABRICATION METHODPRESSED
INTERNAL CLEARANCE0.0005 INCHES MINIMUM RADIAL AND 0.0008 INCHES MAXIMUM RADIAL IN
BORE SHAPESTRAIGHT
LOAD DIRECTIONRADIAL
SURFACE FINISHGROUND
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONDC200,FSCM 71984 MFR REF SINGLE MATERIAL RESPONSE
SHIELD QUANTITY2
STANDARD TOLERANCE DESIGNATIONABEC NO.5
MATERIALSTEEL CORROSION RESISTING OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
50504AInterchangeable
interchangeable cross-reference
interchangeable
50504Interchangeable
interchangeable cross-reference
interchangeable
SC-B-69504Interchangeable
interchangeable cross-reference
interchangeable
CYRB285-0-0-05Interchangeable
interchangeable cross-reference
interchangeable
RF4012X48A512-20Interchangeable
interchangeable cross-reference
interchangeable
CYRB285Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RF4012X48A512-20?
RF4012X48A512-20 is a BEARING,BALL,ANNULAR.
What parts can replace RF4012X48A512-20?
There are 11 known substitutes for RF4012X48A512-20: 50504A, 50504, SC-B-69504 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RF4012X48A512-20?
RF4012X48A512-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-403-7591. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026