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PartsTable / COMPONENT / RI-2258Q4RA1P18LG38KB
RI-2258Q4RA1P18LG38KB ✓ 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 BALL, bore_shape: STRAIGHT, bore_diameter: 0.6250 INCHES NOMINAL IN, overall_width: 0.3438 INCHES NOMINAL IN, load_direction: RADIAL, surface_finish: GROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-107-6449, 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
RI-2258Q4RA1P18LG38KB
NSN: 3110-00-107-6449
FSC: 3110
CAGE: 83086 — NEW HAMPSHIRE BALL BEARINGS INC DIV HITECH DIVISION (USA)
SPECIFICATIONS
materialSTEEL BALL
bore_shapeSTRAIGHT
bore_diameter0.6250 INCHES NOMINAL IN
overall_width0.3438 INCHES NOMINAL IN
seal_quantity1
load_directionRADIAL
surface_finishGROUND
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
bearing_seal_typeCONTACT
overall_outside_diameter1.3750 INCHES NOMINAL IN
internal_fit-up_designationSTANDARD
standard_tolerance_designationABEC NO.1
NSN3110-00-107-6449
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: RI-2258Q4RA1P18LG38KB · 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
•
MATERIAL: RUBBER SYNTHETIC SEAL
•
LOAD DIRECTION: RADIAL
•
SEAL QUANTITY: 1
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALRUBBER SYNTHETIC SEAL
MATERIALSTEEL RETAINER
MATERIALSTEEL INNER RING
MATERIALSTEEL BALL
LOAD DIRECTIONRADIAL
OVERALL WIDTH0.3438 INCHES NOMINAL IN
SEAL QUANTITY1
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
STANDARD TOLERANCE DESIGNATIONABEC NO.1
INTERNAL FIT-UP DESIGNATIONSTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
NASM91531Interchangeable
interchangeable cross-reference
interchangeable
180-356Interchangeable
interchangeable cross-reference
interchangeable
856829Interchangeable
interchangeable cross-reference
interchangeable
24S88Interchangeable
interchangeable cross-reference
interchangeable
24588Interchangeable
interchangeable cross-reference
interchangeable
F40CWX/SSInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is RI-2258Q4RA1P18LG38KB?
RI-2258Q4RA1P18LG38KB is a BEARING,BALL,ANNULAR.
What parts can replace RI-2258Q4RA1P18LG38KB?
There are 11 known substitutes for RI-2258Q4RA1P18LG38KB: NASM91531, 180-356, 856829 and 8 more. Substitute compatibility should be verified for your specific system.
Is RI-2258Q4RA1P18LG38KB still available?
RI-2258Q4RA1P18LG38KB is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026