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Technical Data Sheet
PartsTable / COMPONENT / MJ-12121-OH
MJ-12121-OH ✓ 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, bore_diameter: 0.7500 INCHES NOMINAL IN, overall_width: 0.7500 INCHES NOMINAL IN, alignment_type: RIGID, surface_finish: GROUND, special_features: OIL HOLE IN OUTER RACE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-395-4818, 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
MJ-12121-OH
NSN: 3110-00-395-4818
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.7500 INCHES NOMINAL IN
overall_width0.7500 INCHES NOMINAL IN
alignment_typeRIGID
surface_finishGROUND
special_featuresOIL HOLE IN OUTER RACE
style_designatorNON-SEPARABLE, WITH ROLLER RETAINER, CLOSED END, DRAWN SHELL
overall_outside_diameter1.0000 INCHES NOMINAL IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-395-4818
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MJ-12121-OH · 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
•
SURFACE FINISH: GROUND
•
ALIGNMENT TYPE: RIGID
•
OVERALL OUTSIDE DIAMETER: 1.0000 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
STYLE DESIGNATOR: NON-SEPARABLE, WITH ROLLER RETAINER, CLOSED END, DRAWN SHELL
•
MATERIAL: STEEL OVERALL
•
RETAINER FABRICATION METHOD: PRESSED
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISHGROUND
ALIGNMENT TYPERIGID
OVERALL OUTSIDE DIAMETER1.0000 INCHES NOMINAL IN
OVERALL WIDTH0.7500 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
STYLE DESIGNATORNON-SEPARABLE, WITH ROLLER RETAINER, CLOSED END, DRAWN SHELL
MATERIALSTEEL OVERALL
RETAINER FABRICATION METHODPRESSED
BORE DIAMETER0.7500 INCHES NOMINAL IN
SPECIAL FEATURESOIL HOLE IN OUTER RACE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
9272Interchangeable
interchangeable cross-reference
interchangeable
H9272Interchangeable
interchangeable cross-reference
interchangeable
126402R1Interchangeable
interchangeable cross-reference
interchangeable
11A6692Interchangeable
interchangeable cross-reference
interchangeable
4820-24Interchangeable
interchangeable cross-reference
interchangeable
3204-5006-03Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MJ-12121-OH?
MJ-12121-OH is a BEARING,ROLLER,NEEDLE.
What parts can replace MJ-12121-OH?
There are 16 known substitutes for MJ-12121-OH: 9272, H9272, 126402R1 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for MJ-12121-OH?
MJ-12121-OH is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-395-4818. 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