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PartsTable / COMPONENT / R3ZZQ5A7MILG3278
R3ZZQ5A7MILG3278 ✓ 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: RUBBER SYNTHETIC SEAL, bore_shape: STRAIGHT, bore_diameter: 0.1875 INCHES NOMINAL IN, overall_width: 0.1970 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 3110-00-198-2741, 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
R3ZZQ5A7MILG3278
NSN: 3110-00-198-2741
FSC: 3110
CAGE: 38443 — SKF USA INC. (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEAL
bore_shapeSTRAIGHT
bore_diameter0.1875 INCHES NOMINAL IN
overall_width0.1970 INCHES NOMINAL IN
seal_quantity2
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeCONTACT
lubrication_materialGREASE
overall_outside_diameter0.5000 INCHES NOMINAL IN
internal_fit-up_designationSTANDARD
NSN3110-00-198-2741
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: R3ZZQ5A7MILG3278 · 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
•
LOAD DIRECTION: RADIAL
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
BEARING SEAL TYPE: CONTACT
•
RETAINER FABRICATION METHOD: PRESSED
•
SEAL QUANTITY: 2
•
SURFACE FINISH: GROUND
•
LUBRICATION MATERIAL: GREASE
TECHNICAL CHARACTERISTICS (FLIS)
LOAD DIRECTIONRADIAL
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
BEARING SEAL TYPECONTACT
RETAINER FABRICATION METHODPRESSED
SEAL QUANTITY2
SURFACE FINISHGROUND
LOAD DIRECTIONRADIAL
LUBRICATION MATERIALGREASE
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
BORE SHAPESTRAIGHT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 34
R2SXA7YInterchangeable
interchangeable cross-reference
interchangeable
R2MR3Interchangeable
interchangeable cross-reference
interchangeable
FF-B-2844/02Interchangeable
interchangeable cross-reference
interchangeable
77R12LR1CJInterchangeable
interchangeable cross-reference
interchangeable
AA59644-117ECHCInterchangeable
interchangeable cross-reference
interchangeable
R12.2ZRL15Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is R3ZZQ5A7MILG3278?
R3ZZQ5A7MILG3278 is a BEARING,BALL,ANNULAR.
What parts can replace R3ZZQ5A7MILG3278?
There are 34 known substitutes for R3ZZQ5A7MILG3278: R2SXA7Y, R2MR3, FF-B-2844/02 and 31 more. Substitute compatibility should be verified for your specific system.
What is the NSN for R3ZZQ5A7MILG3278?
R3ZZQ5A7MILG3278 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-198-2741. 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