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PartsTable / COMPONENT / A521-2
A521-2 ✓ 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 RING,BEARING,INNER is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-190-9312, 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
A521-2
NSN: 3110-00-190-9312
FSC: 3110
CAGE: 09136 — BAY CITY SHOVELS, INC (USA)
SPECIFICATIONS
general_characteristics_item_description6 IN. WIDE BY 50 YARD ROLL; STRETCHABLE LATEX RUBBER; COLOR CODED FOR THICKNESS; RED MEDIUM; FOR PROGESSIVE EXERCISING OF UPPER AND LOWER EXTREMITIES IN
NSN3110-00-190-9312
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A521-2 · 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
•
BORE SHAPE: STRAIGHT
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: INNER RING, ROLLER, CYLINDRICAL
•
SURFACE FINISH: GROUND
•
OVERALL OUTSIDE DIAMETER: 2.8500 INCHES NOMINAL IN
•
BORE DIAMETER: 2.3622 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.1
TECHNICAL CHARACTERISTICS (FLIS)
BORE SHAPESTRAIGHT
MATERIALSTEEL OVERALL
STYLE DESIGNATORINNER RING, ROLLER, CYLINDRICAL
SURFACE FINISHGROUND
OVERALL OUTSIDE DIAMETER2.8500 INCHES NOMINAL IN
OVERALL WIDTH1.4375 INCHES NOMINAL IN
BORE DIAMETER2.3622 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONRBEC NO.1
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
AA521-2Interchangeable
interchangeable cross-reference
interchangeable
SL371-14Interchangeable
interchangeable cross-reference
interchangeable
YE628Interchangeable
interchangeable cross-reference
interchangeable
20130Interchangeable
interchangeable cross-reference
interchangeable
98-0248Interchangeable
interchangeable cross-reference
interchangeable
716802Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A521-2?
A521-2 is a RING,BEARING,INNER.
What parts can replace A521-2?
There are 6 known substitutes for A521-2: AA521-2, SL371-14, YE628 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A521-2?
A521-2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-190-9312. 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