PartsTable
Technical Data Sheet
3789MILG3278A ✓ 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, alignment_type: RIGID, inner_ring_width: 1.0000 INCHES NOMINAL IN, outer_ring_width: 0.8750 INCHES NOMINAL IN, style_designator: AIRFRAME, HARDENED AND GROUND, NON-SEPARABLE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-0628, 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
3789MILG3278A
NSN: 3110-00-157-0628
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_diameter0.7500 INCHES NOMINAL IN
alignment_typeRIGID
inner_ring_width1.0000 INCHES NOMINAL IN
outer_ring_width0.8750 INCHES NOMINAL IN
style_designatorAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
surface_treatmentCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
lubrication_materialGREASE
overall_outside_diameter1.5000 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-157-0628
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 3789MILG3278A · 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
LUBRICATION MATERIAL: GREASE
INNER RING WIDTH: 1.0000 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
OUTER RING WIDTH: 0.8750 INCHES NOMINAL IN
ALIGNMENT TYPE: RIGID
STYLE DESIGNATOR: AIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
SURFACE TREATMENT: CADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
LUBRICATION MATERIALGREASE
INNER RING WIDTH1.0000 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
OUTER RING WIDTH0.8750 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
STYLE DESIGNATORAIRFRAME, HARDENED AND GROUND, NON-SEPARABLE
SURFACE TREATMENTCADMIUM ALL EXTERNAL/EXPOSED METAL SURFACES
MATERIALSTEEL OVERALL
OVERALL OUTSIDE DIAMETER1.5000 INCHES NOMINAL IN
BORE DIAMETER0.7500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
77-556AInterchangeable
interchangeable cross-reference
interchangeable
556AInterchangeable
interchangeable cross-reference
interchangeable
077-55600Interchangeable
interchangeable cross-reference
interchangeable
390679C91Interchangeable
interchangeable cross-reference
interchangeable
FD71800Interchangeable
interchangeable cross-reference
interchangeable
5469007Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 3789MILG3278A?
3789MILG3278A is a BEARING,ROLLER,NEEDLE.
What parts can replace 3789MILG3278A?
There are 16 known substitutes for 3789MILG3278A: 77-556A, 556A, 077-55600 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3789MILG3278A?
3789MILG3278A is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-0628. This indicates validated use in U.S. government and defense supply chains.
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