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MR1309 — RING,BEARING,INNER

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

MR1309: RING,BEARING,INNER.

The RING,BEARING,INNER is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, bore_shape: STRAIGHT, bore_diameter: 45.0 MILLIMETERS NOMINAL MM, overall_width: 25.0 MILLIMETERS NOMINAL MM, surface_finish: GROUND, style_designator: INNER RING, ROLLER, SINGLE LIP. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-933-2733, 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
MR1309
NSN: 3110-00-933-2733
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 01212 — FEDERAL-MOGUL CORP GOVERNMENT SALES DEPT (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter45.0 MILLIMETERS NOMINAL MM
overall_width25.0 MILLIMETERS NOMINAL MM
surface_finishGROUND
style_designatorINNER RING, ROLLER, SINGLE LIP
smallest_outside_diameter2.3371 INCHES NOMINAL IN
standard_tolerance_designationRBEC NO.1
NSN3110-00-933-2733
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MR1309 · 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
•
STYLE DESIGNATOR: INNER RING, ROLLER, SINGLE LIP
•
BORE SHAPE: STRAIGHT
•
SMALLEST OUTSIDE DIAMETER: 2.3371 INCHES NOMINAL IN
•
STANDARD TOLERANCE DESIGNATION: RBEC NO.1
•
BORE DIAMETER: 45.0 MILLIMETERS NOMINAL MM
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
SURFACE FINISHGROUND
STYLE DESIGNATORINNER RING, ROLLER, SINGLE LIP
OVERALL WIDTH25.0 MILLIMETERS NOMINAL MM
BORE SHAPESTRAIGHT
SMALLEST OUTSIDE DIAMETER2.3371 INCHES NOMINAL IN
STANDARD TOLERANCE DESIGNATIONRBEC NO.1
BORE DIAMETER45.0 MILLIMETERS NOMINAL MM
MATERIALSTEEL OVERALL
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MR1309?
MR1309 is a RING,BEARING,INNER.
What is the NSN for MR1309?
MR1309 is cataloged in the U.S. Government catalog under NSN 3110-00-933-2733. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.