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Technical Data Sheet
PartsTable / COMPONENT / RBC6MILG3278A
RBC6MILG3278A ✓ 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,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_diameter: 0.3750 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, inner_ring_width: 0.5000 INCHES NOMINAL IN, outer_ring_width: 0.3750 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-0613, 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
RBC6MILG3278A
NSN: 3110-00-157-0613
FSC: 3110
CAGE: 51588 — RBC BEARINGS INCORPORATED DIV WEST TRENTON DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.3750 INCHES NOMINAL IN
alignment_typeRIGID
surface_finishGROUND
inner_ring_width0.5000 INCHES NOMINAL IN
outer_ring_width0.3750 INCHES NOMINAL IN
style_designatorAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
overall_outside_diameter0.9375 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-157-0613
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: RBC6MILG3278A · 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 DOCUMENT AND CLASSIFICATION: MIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
•
LUBRICATION MATERIAL: GREASE
•
RETAINER FABRICATION METHOD: PRESSED
•
INNER RING WIDTH: 0.5000 INCHES NOMINAL IN
•
OUTER RING WIDTH: 0.3750 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
SURFACE FINISH: GROUND
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
LUBRICATION MATERIALGREASE
RETAINER FABRICATION METHODPRESSED
INNER RING WIDTH0.5000 INCHES NOMINAL IN
OUTER RING WIDTH0.3750 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
LUBRICATION MATERIALGREASE
SURFACE FINISHGROUND
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
STYLE DESIGNATORAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
633574Interchangeable
interchangeable cross-reference
interchangeable
FF151Interchangeable
interchangeable cross-reference
interchangeable
8-1049-1Interchangeable
interchangeable cross-reference
interchangeable
7531Interchangeable
interchangeable cross-reference
interchangeable
O-C-265Interchangeable
interchangeable cross-reference
interchangeable
A-A-59282Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RBC6MILG3278A?
RBC6MILG3278A is a BEARING,ROLLER,NEEDLE.
What parts can replace RBC6MILG3278A?
There are 16 known substitutes for RBC6MILG3278A: 633574, FF151, 8-1049-1 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for RBC6MILG3278A?
RBC6MILG3278A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-0613. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026