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Technical Data Sheet
PartsTable / COMPONENT / H491
H491 ✓ 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, temp_rating: 500.0 FAHRENHEIT MINIMUM AND 750.0 FAHRENHEIT MAXIMUM DEGF, bore_diameter: 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN, overall_width: 1.2550 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN, alignment_type: RIGID, 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 3110-00-227-3210, 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
H491
NSN: 3110-00-227-3210
FSC: 3110
CAGE: 08302 — PACCAR WINCH INC DBA PACCAR WINCH DIVISION (USA)
SPECIFICATIONS
materialSTEEL OVERALL
temp_rating500.0 FAHRENHEIT MINIMUM AND 750.0 FAHRENHEIT MAXIMUM DEGF
bore_diameter0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
overall_width1.2550 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
alignment_typeRIGID
surface_finishGROUND
heating_elementINCLUDED
switch_quantity1
special_featuresOIL HOLE AND OIL GROOVE IN OUTER RING,OIL HOLE AND OIL GROOVE IN INNER RING,MFR STD RETAINER
style_designatorSEPARABLE INNER RACE, WITH ROLLER RETAINER, HARDENED AND GROUND
end_item_identification2350-01-458-7318;ASSAULT VEHICLE,FULL TANKED, AMPHIBIOUS
overall_outside_diameter1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
NSN3110-00-227-3210
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: H491 · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
SURFACE FINISH: GROUND
•
OVERALL OUTSIDE DIAMETER: 1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
•
BORE DIAMETER: 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SEPARABLE INNER RACE, WITH ROLLER RETAINER, HARDENED AND GROUND
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
SPECIAL FEATURESOIL HOLE AND OIL GROOVE IN OUTER RING,OIL HOLE AND OIL GROOVE IN INNER RING,MFR STD RETAINER
RETAINER FABRICATION METHODPRESSED
SURFACE FINISHGROUND
OVERALL OUTSIDE DIAMETER1.7495 INCHES MINIMUM AND 1.7500 INCHES MAXIMUM IN
BORE DIAMETER0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
STYLE DESIGNATORSEPARABLE INNER RACE, WITH ROLLER RETAINER, HARDENED AND GROUND
MATERIALSTEEL OVERALL
OVERALL WIDTH1.2550 INCHES MINIMUM AND 1.2600 INCHES MAXIMUM IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
ALIGNMENT TYPERIGID
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
509110Interchangeable
interchangeable cross-reference
interchangeable
5905001048363Interchangeable
interchangeable cross-reference
interchangeable
R25820JInterchangeable
interchangeable cross-reference
interchangeable
20-2820Interchangeable
interchangeable cross-reference
interchangeable
7235Interchangeable
interchangeable cross-reference
interchangeable
NB1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is H491?
H491 is a BEARING,ROLLER,NEEDLE.
What parts can replace H491?
There are 25 known substitutes for H491: 509110, 5905001048363, R25820J and 22 more. Substitute compatibility should be verified for your specific system.
What is the NSN for H491?
H491 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-3210. 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