PartsTable
Technical Data Sheet
251-81 ✓ 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, special_features: PLASTIC HANDLE; 5-1/4 IN. HANDLE LG IN, features_provided: FOLD-UP TYPE, surface_treatment: OXIDE, key_characteristic: CONTAINS HEX KEYS SIZE 2, 2.5, 3, 4, 5, 6, 7 AND 8MM MM, specification/standard_data: 05047-ASME B18.3.2M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-3575, 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
251-81
NSN: 3110-00-156-3575
FSC: 3110
CAGE: 81128 — WHIRLWIND INC (USA)
SPECIFICATIONS
materialSTEEL
key_quantity8
special_featuresPLASTIC HANDLE; 5-1/4 IN. HANDLE LG IN
features_providedFOLD-UP TYPE
surface_treatmentOXIDE
key_characteristicCONTAINS HEX KEYS SIZE 2, 2.5, 3, 4, 5, 6, 7 AND 8MM MM
specification/standard_data05047-ASME B18.3.2M PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
NSN3110-00-156-3575
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 251-81 · 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
NONDEFINITIVE SPEC/STD DATA: 117 TYPE AND 1 CLASS
LUBRICATION MATERIAL: GREASE
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY SHIELD QUANTITY
LOAD DIRECTION: RADIAL
INTERNAL FIT-UP DESIGNATION: STANDARD
BEARING SEAL TYPE: CONTACT
SHIELD QUANTITY: 1
INNER RING WIDTH: 0.7870 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
NONDEFINITIVE SPEC/STD DATA117 TYPE AND 1 CLASS
LUBRICATION MATERIALGREASE
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY SHIELD QUANTITY
LOAD DIRECTIONRADIAL
INTERNAL FIT-UP DESIGNATIONSTANDARD
BEARING SEAL TYPECONTACT
SHIELD QUANTITY1
INNER RING WIDTH0.7870 INCHES NOMINAL IN
SURFACE FINISHGROUND
RETAINER FABRICATION METHODPRESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
110 1-17/64Interchangeable
interchangeable cross-reference
interchangeable
C12281Interchangeable
interchangeable cross-reference
interchangeable
1302Interchangeable
interchangeable cross-reference
interchangeable
A7507Interchangeable
interchangeable cross-reference
interchangeable
207LDInterchangeable
interchangeable cross-reference
interchangeable
25181Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 251-81?
251-81 is a BEARING,BALL,ANNULAR.
What parts can replace 251-81?
There are 16 known substitutes for 251-81: 110 1-17/64, C12281, 1302 and 13 more. Substitute compatibility should be verified for your specific system.
Is 251-81 still available?
251-81 is currently cancelled.
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